{"id":6444,"date":"2026-02-04T20:27:07","date_gmt":"2026-02-04T12:27:07","guid":{"rendered":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/"},"modified":"2026-02-04T20:27:07","modified_gmt":"2026-02-04T12:27:07","slug":"navigating-the-three-levels-of-database-design-conceptual-logical-and-physical","status":"publish","type":"post","link":"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/","title":{"rendered":"\u0110i\u1ec1u h\u01b0\u1edbng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: Kh\u00e1i ni\u1ec7m, Logic v\u00e0 V\u1eadt l\u00fd"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p>Trong l\u0129nh v\u1ef1c qu\u1ea3n l\u00fd d\u1eef li\u1ec7u, vi\u1ec7c thi\u1ebft k\u1ebf m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a m\u1ed9t t\u1ed5 ch\u1ee9c l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 \u0111a chi\u1ec1u. N\u00f3 bao g\u1ed3m m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ea9n th\u1eadn di\u1ec5n ra trong ba giai \u0111o\u1ea1n ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. Ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf n\u00e0y \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng ch\u1ec9 n\u1eafm b\u1eaft b\u1ea3n ch\u1ea5t c\u1ee7a d\u1eef li\u1ec7u m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n, hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ea3o m\u1eadt. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd c\u00f9ng kh\u00e1m ph\u00e1 ba c\u1ea5p \u0111\u1ed9 n\u00e0y, t\u00ecm hi\u1ec3u v\u1ec1 \u00fd ngh\u0129a, s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 c\u00e1ch ch\u00fang ph\u1ed1i h\u1ee3p \u0111\u1ec3 h\u00ecnh th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd.<\/p>\n<p id=\"kVSylKT\"><img fetchpriority=\"high\" alt=\"\" class=\"alignnone size-full wp-image-2450\" decoding=\"async\" fetchpriority=\"high\" height=\"512\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/09\/img_6508717e86ef8.png\" width=\"512\"\/><\/p>\n<h2>S\u01a1 \u0111\u1ed3 ERD kh\u00e1i ni\u1ec7m so v\u1edbi logic v\u00e0 v\u1eadt l\u00fd<\/h2>\n<p>C\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin hi\u1ec7n \u0111\u1ea1i, \u0111\u00f3ng vai tr\u00f2 l\u00e0 kho ch\u1ee9a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c v\u00e0 c\u1ea5u tr\u00fac h\u00f3a. Khi thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i tu\u00e2n theo m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u00f3 c\u1ea5u tr\u00fac, bao g\u1ed3m ba c\u1ea5p \u0111\u1ed9 ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. M\u1ed7i c\u1ea5p \u0111\u1ed9 \u0111\u1ec1u c\u00f3 m\u1ee5c \u0111\u00edch ri\u00eang v\u00e0 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd v\u00e0 hi\u1ec7u qu\u1ea3. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u ba c\u1ea5p \u0111\u1ed9 n\u00e0y, ph\u00e2n t\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang v\u00e0 \u0111\u01b0a ra c\u00e1c v\u00ed d\u1ee5 minh h\u1ecda v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a ch\u00fang.<\/p>\n<p><img alt=\"Introduction to Data Modeling with Visual Paradigm: ERD Diagramming, Code Generation, and Reverse Engineering - Visual Paradigm Guides\" decoding=\"async\" src=\"https:\/\/guides.visual-paradigm.com\/wp-content\/uploads\/2023\/03\/from-conceptual-to-logical-to-physical-erd.png\"\/><\/p>\n<ol>\n<li>\n<h3>Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m<\/h3>\n<\/li>\n<\/ol>\n<p>Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m l\u00e0 c\u1ea5p \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng cao nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf t\u1eadp trung v\u00e0o vi\u1ec7c hi\u1ec3u r\u00f5 l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1 v\u00e0 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac t\u1ed5ng th\u1ec3 c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. M\u1ee5c ti\u00eau ch\u00ednh l\u00e0 t\u1ea1o ra m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 to\u00e0n di\u1ec7n v\u1ec1 d\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang.<\/p>\n<p><strong>M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:<\/strong>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc mu\u1ed1n t\u1ea1o m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 qu\u1ea3n l\u00fd th\u00f4ng tin sinh vi\u00ean. Trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m, v\u1ea5n \u0111\u1ec1 ch\u00ednh l\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 c\u1ee7a ch\u00fang trong b\u1ed1i c\u1ea3nh tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc. C\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean, c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean v\u00e0 c\u00e1c khoa. C\u00e1c m\u1ed1i quan h\u1ec7 c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean \u0111\u0103ng k\u00fd c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y c\u00e1c kh\u00f3a h\u1ecdc v\u00e0 c\u00e1c khoa qu\u1ea3n l\u00fd c\u00e1c kh\u00f3a h\u1ecdc.<\/p>\n<p><strong>V\u00ed d\u1ee5:<\/strong><\/p>\n<ul>\n<li>C\u00e1c th\u1ef1c th\u1ec3: Sinh vi\u00ean, Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean, Khoa<\/li>\n<li>C\u00e1c m\u1ed1i quan h\u1ec7: Sinh vi\u00ean \u0111\u0103ng k\u00fd Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y Kh\u00f3a h\u1ecdc, Khoa qu\u1ea3n l\u00fd Kh\u00f3a h\u1ecdc<\/li>\n<\/ul>\n<ol start=\"2\">\n<li>\n<h3>Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic<\/h3>\n<\/li>\n<\/ol>\n<p>Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa c\u1ea5p \u0111\u1ed9 kh\u00e1i ni\u1ec7m v\u00e0 c\u1ea5p \u0111\u1ed9 v\u1eadt l\u00fd. \u1ede \u0111\u00e2y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh kh\u00e1i ni\u1ec7m th\u00e0nh m\u1ed9t bi\u1ec3u di\u1ec5n chi ti\u1ebft h\u01a1n, t\u1eadp trung v\u00e0o c\u1ea5u tr\u00fac d\u1eef li\u1ec7u, c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 r\u00e0ng bu\u1ed9c. Thi\u1ebft k\u1ebf logic \u0111\u1ed9c l\u1eadp v\u1edbi b\u1ea5t k\u1ef3 h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u (DBMS) c\u1ee5 th\u1ec3 n\u00e0o v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng s\u01a1 \u0111\u1ed3 Entiti-Quan h\u1ec7 (ERD) ho\u1eb7c c\u00e1c k\u1ef9 thu\u1eadt m\u00f4 h\u00ecnh h\u00f3a t\u01b0\u01a1ng t\u1ef1.<\/p>\n<p><strong>M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:<\/strong>Ti\u1ebfp t\u1ee5c v\u1edbi v\u00ed d\u1ee5 tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf logic, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh cho m\u1ed7i th\u1ef1c th\u1ec3 v\u00e0 ch\u1ec9 \u0111\u1ecbnh ki\u1ec3u d\u1eef li\u1ec7u, kh\u00f3a ch\u00ednh v\u00e0 kh\u00f3a ngo\u1ea1i. Giai \u0111o\u1ea1n n\u00e0y c\u0169ng bao g\u1ed3m vi\u1ec7c chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u \u0111\u1ec3 lo\u1ea1i b\u1ecf s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u.<\/p>\n<p><strong>V\u00ed d\u1ee5:<\/strong><\/p>\n<ul>\n<li>Th\u1ef1c th\u1ec3 Sinh vi\u00ean:\n<ul>\n<li>Thu\u1ed9c t\u00ednh: MSSV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean, Ng\u00e0y sinh<\/li>\n<\/ul>\n<\/li>\n<li>Th\u1ef1c th\u1ec3 Kh\u00f3a h\u1ecdc:\n<ul>\n<li>Thu\u1ed9c t\u00ednh: Makh\u00f3a h\u1ecdc (Kh\u00f3a ch\u00ednh), T\u00ean kh\u00f3a h\u1ecdc, S\u1ed1 t\u00edn ch\u1ec9<\/li>\n<\/ul>\n<\/li>\n<li>Th\u1ef1c th\u1ec3 Gi\u1ea3ng vi\u00ean:\n<ul>\n<li>Thu\u1ed9c t\u00ednh: MAGV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean<\/li>\n<\/ul>\n<\/li>\n<li>Th\u1ef1c th\u1ec3 Khoa:\n<ul>\n<li>Thu\u1ed9c t\u00ednh: MAKhoa (Kh\u00f3a ch\u00ednh), T\u00ean khoa<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ol start=\"3\">\n<li>\n<h3>Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd<\/h3>\n<\/li>\n<\/ol>\n<p>Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd l\u00e0 c\u1ea5p \u0111\u1ed9 chi ti\u1ebft v\u00e0 k\u1ef9 thu\u1eadt nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh v\u1ec1 c\u00e1ch tri\u1ec3n khai thi\u1ebft k\u1ebf logic tr\u00ean m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t bao g\u1ed3m ch\u1ec9 m\u1ee5c, l\u01b0u tr\u1eef, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt.<\/p>\n<p><strong>M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:<\/strong>\u0110\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf v\u1eadt l\u00fd, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u00e0o s\u1ebd s\u1eed d\u1ee5ng (v\u00ed d\u1ee5: MySQL, Oracle, PostgreSQL) v\u00e0 t\u1ea1o ra s\u01a1 \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u1ef1c t\u1ebf. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac b\u1ea3ng c\u1ee5 th\u1ec3, ki\u1ec3u d\u1eef li\u1ec7u, r\u00e0ng bu\u1ed9c v\u00e0 ch\u1ec9 m\u1ee5c. N\u00f3 c\u0169ng bao g\u1ed3m c\u00e1c quy\u1ebft \u0111\u1ecbnh v\u1ec1 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, ph\u00e2n m\u1ea3nh v\u00e0 ki\u1ec3m so\u00e1t truy c\u1eadp.<\/p>\n<p><strong>V\u00ed d\u1ee5:<\/strong><\/p>\n<ul>\n<li>B\u1ea3ng Sinh vi\u00ean (Ng\u1eef ph\u00e1p MySQL):\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\">sql<button class=\"flex ml-auto gap-2\">Sao ch\u00e9p m\u00e3<\/button><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-sql\"><span class=\"hljs-keyword\">T\u1ea0O<\/span> <span class=\"hljs-keyword\">B\u1ea2NG<\/span> Sinh vi\u00ean (<br \/>\nM\u00e3SinhVi\u00ean <span class=\"hljs-type\">INT<\/span> <span class=\"hljs-keyword\">CH\u00cdNH<\/span> KH\u00d3A,<br \/>\nH\u1ecd <span class=\"hljs-type\">VARCHAR<\/span>(<span class=\"hljs-number\">50<\/span>),<br \/>\nT\u00ean \u0111\u1ec7m <span class=\"hljs-type\">VARCHAR<\/span>(<span class=\"hljs-number\">50<\/span>),<br \/>\nNg\u00e0y sinh <span class=\"hljs-type\">DATE<\/span><br \/>\n);<br \/>\n<\/code><\/div>\n<\/div>\n<\/li>\n<li>B\u1ea3ng Kh\u00f3a h\u1ecdc:\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\">sql<button class=\"flex ml-auto gap-2\">Sao ch\u00e9p m\u00e3<\/button><\/div>\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-sql\"><span class=\"hljs-keyword\">T\u1ea0O<\/span> <span class=\"hljs-keyword\">B\u1ea2NG<\/span> Kh\u00f3a h\u1ecdc (<br \/>\nM\u00e3Kh\u00f3aH\u1ecdc <span class=\"hljs-type\">INT<\/span> <span class=\"hljs-keyword\">CH\u00cdNH<\/span> KH\u00d3A,<br \/>\nT\u00eanKh\u00f3aH\u1ecdc <span class=\"hljs-type\">VARCHAR<\/span>(<span class=\"hljs-number\">100<\/span>),<br \/>\nS\u1ed1T\u00ednCh\u1ec9 <span class=\"hljs-type\">INT<\/span><br \/>\n);<\/code><\/div>\n<\/div>\n<div><\/div>\n<\/li>\n<\/ul>\n<h2>T\u00f3m t\u1eaft c\u00e1c \u0111i\u1ec3m kh\u00e1c bi\u1ec7t<\/h2>\n<p>B\u1ea3ng sau cung c\u1ea5p c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng v\u1ec1 c\u00e1ch ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1c nhau v\u1ec1 m\u1ee5c \u0111\u00edch, tr\u1ecdng t\u00e2m, t\u00ednh \u0111\u1ed9c l\u1eadp v\u1edbi h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3, c\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a, v\u00e0 c\u00e1c v\u00ed d\u1ee5 v\u1ec1 thu\u1ed9c t\u00ednh, m\u1ed1i quan h\u1ec7 v\u00e0 kh\u00f3a \u1edf m\u1ed7i c\u1ea5p \u0111\u1ed9. Vi\u1ec7c hi\u1ec3u r\u00f5 nh\u1eefng kh\u00e1c bi\u1ec7t n\u00e0y l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u su\u1ea5t cao.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3ng cung c\u1ea5p s\u1ef1 \u0111\u1ed1i chi\u1ebfu ng\u1eafn g\u1ecdn gi\u1eefa ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd.<\/p>\n<table>\n<thead>\n<tr>\n<th>Kh\u00eda c\u1ea1nh<\/th>\n<th>Thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m<\/th>\n<th>Thi\u1ebft k\u1ebf logic<\/th>\n<th>Thi\u1ebft k\u1ebf v\u1eadt l\u00fd<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M\u1ee9c \u0111\u1ed9 tr\u1eeb t\u01b0\u1ee3ng<\/td>\n<td>M\u1ee9c \u0111\u1ed9 cao nh\u1ea5t c\u1ee7a<\/td>\n<td>M\u1ee9c \u0111\u1ed9 trung gian<\/td>\n<td>M\u1ee9c \u0111\u1ed9 th\u1ea5p nh\u1ea5t c\u1ee7a<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>tr\u1eeb t\u01b0\u1ee3ng<\/td>\n<td>c\u1ee7a tr\u1eeb t\u01b0\u1ee3ng<\/td>\n<td>tr\u1eeb t\u01b0\u1ee3ng<\/td>\n<\/tr>\n<tr>\n<td>M\u1ee5c \u0111\u00edch<\/td>\n<td>X\u00e1c \u0111\u1ecbnh t\u1ed5ng th\u1ec3<\/td>\n<td>Chuy\u1ec3n \u0111\u1ed5i thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m<\/td>\n<td>Tri\u1ec3n khai c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>c\u1ea5u tr\u00fac, c\u00e1c th\u1ef1c th\u1ec3 v\u00e0<\/td>\n<td>m\u00f4 h\u00ecnh h\u00f3a th\u00e0nh d\u1eef li\u1ec7u chi ti\u1ebft<\/td>\n<td>tr\u00ean m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3,<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>c\u00e1c m\u1ed1i quan h\u1ec7<\/td>\n<td>c\u1ea5u tr\u00fac, thu\u1ed9c t\u00ednh,<\/td>\n<td>bao g\u1ed3m vi\u1ec7c x\u00e1c \u0111\u1ecbnh<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td>v\u00e0 r\u00e0ng bu\u1ed9c<\/td>\n<td>l\u01b0u tr\u1eef v\u00e0 t\u1ed1i \u01b0u h\u00f3a<\/td>\n<\/tr>\n<tr>\n<td>T\u1eadp trung<\/td>\n<td>D\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7<\/td>\n<td>C\u1ea5u tr\u00fac d\u1eef li\u1ec7u,<\/td>\n<td>Chi ti\u1ebft tri\u1ec3n khai<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>\u1edf c\u1ea5p \u0111\u1ed9 cao<\/td>\n<td>thu\u1ed9c t\u00ednh, kh\u00f3a v\u00e0<\/td>\n<td>nh\u01b0 ch\u1ec9 m\u1ee5c h\u00f3a,<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td>c\u00e1c m\u1ed1i quan h\u1ec7<\/td>\n<td>l\u01b0u tr\u1eef v\u00e0 b\u1ea3o m\u1eadt<\/td>\n<\/tr>\n<tr>\n<td>T\u00ednh \u0111\u1ed9c l\u1eadp<\/td>\n<td>\u0110\u1ed9c l\u1eadp v\u1edbi<\/td>\n<td>\u0110\u1ed9c l\u1eadp v\u1edbi c\u1ee5 th\u1ec3<\/td>\n<td>C\u1ee5 th\u1ec3 v\u1edbi m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>b\u1ea5t k\u1ef3 h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u00e0o<\/td>\n<td>H\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/td>\n<td>ph\u1ea7n c\u1ee9ng<\/td>\n<\/tr>\n<tr>\n<td>C\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a<\/td>\n<td>S\u01a1 \u0111\u1ed3 c\u1ea5p cao,<\/td>\n<td>Th\u1ef1c th\u1ec3 &#8211; Quan h\u1ec7<\/td>\n<td>SQL, qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>nh\u01b0 th\u1ef1c th\u1ec3-<\/td>\n<td>S\u01a1 \u0111\u1ed3 (ERD),<\/td>\n<td>c\u00e1c c\u00f4ng c\u1ee5 \u0111\u1eb7c th\u00f9 h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>S\u01a1 \u0111\u1ed3 quan h\u1ec7<\/td>\n<td>C\u00e1c k\u1ef9 thu\u1eadt chu\u1ea9n h\u00f3a<\/td>\n<td>v\u00e0 ti\u1ec7n \u00edch<\/td>\n<\/tr>\n<tr>\n<td>Ki\u1ec3u d\u1eef li\u1ec7u v\u00e0<\/td>\n<td>Kh\u00f4ng quan t\u00e2m \u0111\u1ebfn d\u1eef li\u1ec7u<\/td>\n<td>X\u00e1c \u0111\u1ecbnh ki\u1ec3u d\u1eef li\u1ec7u,<\/td>\n<td>X\u00e1c \u0111\u1ecbnh ki\u1ec3u d\u1eef li\u1ec7u,<\/td>\n<\/tr>\n<tr>\n<td>R\u00e0ng bu\u1ed9c<\/td>\n<td>ki\u1ec3u ho\u1eb7c r\u00e0ng bu\u1ed9c<\/td>\n<td>r\u00e0ng bu\u1ed9c, v\u00e0<\/td>\n<td>r\u00e0ng bu\u1ed9c, v\u00e0<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td>quan h\u1ec7<\/td>\n<td>quan h\u1ec7<\/td>\n<\/tr>\n<tr>\n<td>Thu\u1ed9c t\u00ednh v\u00ed d\u1ee5<\/td>\n<td>T\u00ean sinh vi\u00ean<\/td>\n<td>Ng\u00e0y sinh c\u1ee7a sinh vi\u00ean<\/td>\n<td>Ng\u00e0y sinh c\u1ee7a sinh vi\u00ean<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td>(VARCHAR, DATE)<\/td>\n<\/tr>\n<tr>\n<td>Quan h\u1ec7 v\u00ed d\u1ee5<\/td>\n<td>Sinh vi\u00ean \u0111\u0103ng k\u00fd v\u00e0o<\/td>\n<td>Sinh vi\u00ean \u0111\u0103ng k\u00fd v\u00e0o<\/td>\n<td>Sinh vi\u00ean \u0111\u0103ng k\u00fd v\u00e0o<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td>Kh\u00f3a h\u1ecdc<\/td>\n<td>Kh\u00f3a h\u1ecdc<\/td>\n<td>Kh\u00f3a h\u1ecdc<\/td>\n<\/tr>\n<tr>\n<td>Kh\u00f3a v\u00ed d\u1ee5<\/td>\n<td>Kh\u00f4ng \u00e1p d\u1ee5ng<\/td>\n<td>M\u00e3 sinh vi\u00ean (Kh\u00f3a ch\u00ednh)<\/td>\n<td>M\u00e3 sinh vi\u00ean (Kh\u00f3a ch\u00ednh)<\/td>\n<\/tr>\n<tr>\n<td><\/td>\n<td><\/td>\n<td>M\u00e3 kh\u00f3a h\u1ecdc (Kh\u00f3a ch\u00ednh)<\/td>\n<td>M\u00e3 kh\u00f3a h\u1ecdc (Kh\u00f3a ch\u00ednh)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>T\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: S\u1ef1 l\u1ef1a ch\u1ecdn gi\u1eefa ba c\u1ea5p \u0111\u1ed9<\/h2>\n<p>Vi\u1ec7c c\u00f3 n\u00ean \u0111i qua ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u (kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd) khi ph\u00e1t tri\u1ec3n c\u01a1 s\u1edf d\u1eef li\u1ec7u cho m\u1ed9t h\u1ec7 th\u1ed1ng c\u00f4ng ngh\u1ec7 th\u00f4ng tin ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng nh\u1ecf ho\u1eb7c \u00edt ph\u1ee9c t\u1ea1p h\u01a1n, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u01a1n gi\u1ea3n h\u00f3a c\u00f3 th\u1ec3 hi\u1ec7u qu\u1ea3 h\u01a1n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 c\u1ea7n c\u00e2n nh\u1eafc:<\/p>\n<ol>\n<li><strong>M\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a d\u1ef1 \u00e1n:<\/strong>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng nh\u1ecf \u0111\u1ebfn trung b\u00ecnh v\u1ec1 \u0111\u1ed9 ph\u1ee9c t\u1ea1p, b\u1ea1n c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p ho\u1eb7c \u0111\u01a1n gi\u1ea3n h\u00f3a m\u1ed9t s\u1ed1 c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf n\u00e0y. C\u00e1c d\u1ef1 \u00e1n \u0111\u01a1n gi\u1ea3n c\u00f3 th\u1ec3 kh\u00f4ng c\u1ea7n \u0111\u1ebfn thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m chi ti\u1ebft, v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n nhanh h\u01a1n t\u1eeb thi\u1ebft k\u1ebf logic sang tri\u1ec3n khai v\u1eadt l\u00fd.<\/li>\n<li><strong>Th\u1eddi gian ph\u00e1t tri\u1ec3n:<\/strong>Trong m\u00f4i tr\u01b0\u1eddng ph\u00e1t tri\u1ec3n nhanh v\u00e0 linh ho\u1ea1t, th\u01b0\u1eddng b\u1eaft \u0111\u1ea7u b\u1eb1ng m\u1ed9t thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m c\u1ea5p cao v\u00e0 d\u1ea7n d\u1ea7n ph\u00e1t tri\u1ec3n n\u00f3 theo ti\u1ebfn \u0111\u1ed9 d\u1ef1 \u00e1n. B\u1ea1n c\u00f3 th\u1ec3 kh\u00f4ng c\u1ea7n ph\u1ea3i ho\u00e0n thi\u1ec7n m\u1ecdi chi ti\u1ebft tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n.<\/li>\n<li><strong>H\u1ea1n ch\u1ebf v\u1ec1 ngu\u1ed3n l\u1ef1c:<\/strong>Th\u1eddi gian, ng\u00e2n s\u00e1ch ho\u1eb7c chuy\u00ean m\u00f4n h\u1ea1n ch\u1ebf c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u01a1n gi\u1ea3n h\u00f3a h\u01a1n. C\u00e1c d\u1ef1 \u00e1n nh\u1ecf ho\u1eb7c b\u1ea3n m\u1eabu th\u01b0\u1eddng \u01b0u ti\u00ean t\u1ed1c \u0111\u1ed9 h\u01a1n l\u00e0 c\u00e1c giai \u0111o\u1ea1n thi\u1ebft k\u1ebf chi ti\u1ebft.<\/li>\n<li><strong>C\u00e1c h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u:<\/strong>Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, n\u1ebfu b\u1ea1n \u0111ang l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 khung c\u00f4ng t\u00e1c \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c l\u1eadp v\u1eefng ch\u1eafc, b\u1ea1n c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng c\u00e1c m\u1eabu v\u00e0 c\u1ea5u tr\u00fac hi\u1ec7n c\u00f3, gi\u1ea3m nhu c\u1ea7u v\u1ec1 giai \u0111o\u1ea1n thi\u1ebft k\u1ebf logic v\u00e0 v\u1eadt l\u00fd to\u00e0n di\u1ec7n.<\/li>\n<li><strong>Qu\u1ea3n l\u00fd thay \u0111\u1ed5i:<\/strong>N\u1ebfu y\u00eau c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n th\u01b0\u1eddng xuy\u00ean thay \u0111\u1ed5i ho\u1eb7c ban \u0111\u1ea7u ch\u01b0a \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng, c\u00f3 th\u1ec3 hi\u1ec7u qu\u1ea3 h\u01a1n khi duy tr\u00ec m\u1ed9t thi\u1ebft k\u1ebf linh ho\u1ea1t c\u00f3 th\u1ec3 th\u00edch nghi khi y\u00eau c\u1ea7u thay \u0111\u1ed5i.<\/li>\n<\/ol>\n<p>Tuy nhi\u00ean, \u0111\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u1edbn, quan tr\u1ecdng ho\u1eb7c ph\u1ee9c t\u1ea1p, vi\u1ec7c tu\u00e2n theo c\u1ea3 ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf l\u00e0 r\u1ea5t \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb. C\u00e1c giai \u0111o\u1ea1n n\u00e0y gi\u00fap \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c, t\u00ednh to\u00e0n v\u1eb9n, b\u1ea3o m\u1eadt v\u00e0 hi\u1ec7u su\u1ea5t d\u1eef li\u1ec7u. M\u1ed9t thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m k\u1ef9 l\u01b0\u1ee1ng gi\u00fap c\u00e1c b\u00ean li\u00ean quan hi\u1ec3u r\u00f5 v\u00e0 th\u1ed1ng nh\u1ea5t v\u1ec1 m\u00f4 h\u00ecnh d\u1eef li\u1ec7u. Thi\u1ebft k\u1ebf logic gi\u00fap lo\u1ea1i b\u1ecf s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 l\u00e0m r\u00f5 c\u00e1c m\u1ed1i quan h\u1ec7. Thi\u1ebft k\u1ebf v\u1eadt l\u00fd \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 b\u1ea3o m\u1eadt trong h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 ch\u1ecdn.<\/p>\n<p>Trong nhi\u1ec1u t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf, c\u00e1ch ti\u1ebfp c\u1eadn k\u1ebft h\u1ee3p c\u0169ng c\u00f3 th\u1ec3 hi\u1ec7u qu\u1ea3. B\u1eaft \u0111\u1ea7u b\u1eb1ng thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m c\u1ea5p cao \u0111\u1ec3 n\u1eafm b\u1eaft l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1, sau \u0111\u00f3 \u0111i s\u00e2u v\u00e0o thi\u1ebft k\u1ebf logic \u0111\u1ec3 l\u00e0m r\u00f5 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u v\u00e0 m\u1ed1i quan h\u1ec7. Khi \u0111\u00e3 c\u00f3 m\u00f4 h\u00ecnh logic v\u1eefng ch\u1eafc, h\u00e3y ti\u1ebfn h\u00e0nh thi\u1ebft k\u1ebf v\u1eadt l\u00fd \u0111\u1ec3 tri\u1ec3n khai n\u00f3 trong h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e3 ch\u1ecdn.<\/p>\n<p>M\u1eb7c d\u00f9 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng c\u1ea7n tu\u00e2n theo c\u1ea3 ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u cho m\u1ecdi h\u1ec7 th\u1ed1ng c\u00f4ng ngh\u1ec7 th\u00f4ng tin, nh\u01b0ng s\u1ef1 l\u1ef1a ch\u1ecdn c\u1ea7n d\u1ef1a tr\u00ean y\u00eau c\u1ea7u, \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 gi\u1edbi h\u1ea1n c\u1ee7a d\u1ef1 \u00e1n. M\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u01b0\u1ee3c suy ngh\u0129 k\u1ef9 l\u01b0\u1ee1ng, c\u00e2n b\u1eb1ng gi\u1eefa hi\u1ec7u qu\u1ea3 v\u00e0 t\u00ednh to\u00e0n di\u1ec7n, l\u00e0 ch\u00eca kh\u00f3a cho vi\u1ec7c ph\u00e1t tri\u1ec3n c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u00e0nh c\u00f4ng.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m, thi\u1ebft k\u1ebf logic v\u00e0 thi\u1ebft k\u1ebf v\u1eadt l\u00fd l\u00e0 nh\u1eefng ph\u1ea7n thi\u1ebft y\u1ebfu trong vi\u1ec7c t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd v\u00e0 hi\u1ec7u qu\u1ea3. M\u1ed7i c\u1ea5p \u0111\u1ed9 \u0111\u1ec1u c\u00f3 m\u1ed9t m\u1ee5c \u0111\u00edch ri\u00eang trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u, b\u1eaft \u0111\u1ea7u t\u1eeb vi\u1ec7c hi\u1ec3u r\u00f5 l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1 \u1edf c\u1ea5p \u0111\u1ed9 cao, r\u1ed3i ti\u1ebfn \u0111\u1ebfn chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. B\u1eb1ng c\u00e1ch tu\u00e2n theo c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 c\u1ea5u tr\u00fac n\u00e0y, c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a h\u1ecd \u0111\u00e1p \u1ee9ng nhu c\u1ea7u qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u su\u1ea5t cao.<\/p>\n<p>Vi\u1ec7c t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 \u0111\u00f2i h\u1ecfi c\u00e1ch ti\u1ebfp c\u1eadn ba t\u1ea7ng, b\u1eaft \u0111\u1ea7u t\u1eeb giai \u0111o\u1ea1n kh\u00e1i ni\u1ec7m, n\u01a1i t\u1eadp trung v\u00e0o vi\u1ec7c hi\u1ec3u r\u00f5 l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1 v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 v\u00e0 m\u1ed1i quan h\u1ec7. Chuy\u1ec3n sang c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf logic, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh kh\u00e1i ni\u1ec7m th\u00e0nh m\u1ed9t bi\u1ec3u di\u1ec5n chi ti\u1ebft h\u01a1n, x\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh, kh\u00f3a v\u00e0 m\u1ed1i quan h\u1ec7. Cu\u1ed1i c\u00f9ng, c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf v\u1eadt l\u00fd bi\u1ebfn m\u00f4 h\u00ecnh logic th\u00e0nh m\u1ed9t l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3, \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh v\u1ec1 ki\u1ec3u d\u1eef li\u1ec7u, l\u01b0u tr\u1eef v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt. B\u1eb1ng c\u00e1ch n\u1eafm v\u1eefng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u00e0y, c\u00e1c t\u1ed5 ch\u1ee9c c\u00f3 th\u1ec3 khai th\u00e1c t\u1ed1i \u0111a s\u1ee9c m\u1ea1nh c\u1ee7a d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u lu\u00f4n \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c, d\u1ec5 truy c\u1eadp v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb.<\/p>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1edbi thi\u1ec7u Trong l\u0129nh v\u1ef1c qu\u1ea3n l\u00fd d\u1eef li\u1ec7u, vi\u1ec7c thi\u1ebft k\u1ebf m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a m\u1ed9t t\u1ed5 ch\u1ee9c l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 \u0111a chi\u1ec1u. N\u00f3 bao g\u1ed3m m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ea9n th\u1eadn di\u1ec5n ra trong ba giai \u0111o\u1ea1n ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. Ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf n\u00e0y \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng ch\u1ec9 n\u1eafm b\u1eaft b\u1ea3n ch\u1ea5t c\u1ee7a d\u1eef li\u1ec7u m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n, hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ea3o m\u1eadt. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd c\u00f9ng kh\u00e1m ph\u00e1 ba c\u1ea5p \u0111\u1ed9 n\u00e0y, t\u00ecm hi\u1ec3u v\u1ec1 \u00fd ngh\u0129a, s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 c\u00e1ch ch\u00fang ph\u1ed1i h\u1ee3p \u0111\u1ec3 h\u00ecnh th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd. S\u01a1 \u0111\u1ed3 ERD kh\u00e1i ni\u1ec7m so v\u1edbi logic v\u00e0 v\u1eadt l\u00fd C\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin hi\u1ec7n \u0111\u1ea1i, \u0111\u00f3ng vai tr\u00f2 l\u00e0 kho ch\u1ee9a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c v\u00e0 c\u1ea5u tr\u00fac h\u00f3a. Khi thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i tu\u00e2n theo m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u00f3 c\u1ea5u tr\u00fac, bao g\u1ed3m ba c\u1ea5p \u0111\u1ed9 ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. M\u1ed7i c\u1ea5p \u0111\u1ed9 \u0111\u1ec1u c\u00f3 m\u1ee5c \u0111\u00edch ri\u00eang v\u00e0 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd v\u00e0 hi\u1ec7u qu\u1ea3. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u ba c\u1ea5p \u0111\u1ed9 n\u00e0y, ph\u00e2n t\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang v\u00e0 \u0111\u01b0a ra c\u00e1c v\u00ed d\u1ee5 minh h\u1ecda v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a ch\u00fang. Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m l\u00e0 c\u1ea5p \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng cao nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf t\u1eadp trung v\u00e0o vi\u1ec7c hi\u1ec3u r\u00f5 l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1 v\u00e0 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac t\u1ed5ng th\u1ec3 c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. M\u1ee5c ti\u00eau ch\u00ednh l\u00e0 t\u1ea1o ra m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 to\u00e0n di\u1ec7n v\u1ec1 d\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc mu\u1ed1n t\u1ea1o m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 qu\u1ea3n l\u00fd th\u00f4ng tin sinh vi\u00ean. Trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m, v\u1ea5n \u0111\u1ec1 ch\u00ednh l\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 c\u1ee7a ch\u00fang trong b\u1ed1i c\u1ea3nh tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc. C\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean, c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean v\u00e0 c\u00e1c khoa. C\u00e1c m\u1ed1i quan h\u1ec7 c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean \u0111\u0103ng k\u00fd c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y c\u00e1c kh\u00f3a h\u1ecdc v\u00e0 c\u00e1c khoa qu\u1ea3n l\u00fd c\u00e1c kh\u00f3a h\u1ecdc. V\u00ed d\u1ee5: C\u00e1c th\u1ef1c th\u1ec3: Sinh vi\u00ean, Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean, Khoa C\u00e1c m\u1ed1i quan h\u1ec7: Sinh vi\u00ean \u0111\u0103ng k\u00fd Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y Kh\u00f3a h\u1ecdc, Khoa qu\u1ea3n l\u00fd Kh\u00f3a h\u1ecdc Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa c\u1ea5p \u0111\u1ed9 kh\u00e1i ni\u1ec7m v\u00e0 c\u1ea5p \u0111\u1ed9 v\u1eadt l\u00fd. \u1ede \u0111\u00e2y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh kh\u00e1i ni\u1ec7m th\u00e0nh m\u1ed9t bi\u1ec3u di\u1ec5n chi ti\u1ebft h\u01a1n, t\u1eadp trung v\u00e0o c\u1ea5u tr\u00fac d\u1eef li\u1ec7u, c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 r\u00e0ng bu\u1ed9c. Thi\u1ebft k\u1ebf logic \u0111\u1ed9c l\u1eadp v\u1edbi b\u1ea5t k\u1ef3 h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u (DBMS) c\u1ee5 th\u1ec3 n\u00e0o v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng s\u01a1 \u0111\u1ed3 Entiti-Quan h\u1ec7 (ERD) ho\u1eb7c c\u00e1c k\u1ef9 thu\u1eadt m\u00f4 h\u00ecnh h\u00f3a t\u01b0\u01a1ng t\u1ef1. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:Ti\u1ebfp t\u1ee5c v\u1edbi v\u00ed d\u1ee5 tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf logic, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh cho m\u1ed7i th\u1ef1c th\u1ec3 v\u00e0 ch\u1ec9 \u0111\u1ecbnh ki\u1ec3u d\u1eef li\u1ec7u, kh\u00f3a ch\u00ednh v\u00e0 kh\u00f3a ngo\u1ea1i. Giai \u0111o\u1ea1n n\u00e0y c\u0169ng bao g\u1ed3m vi\u1ec7c chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u \u0111\u1ec3 lo\u1ea1i b\u1ecf s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u. V\u00ed d\u1ee5: Th\u1ef1c th\u1ec3 Sinh vi\u00ean: Thu\u1ed9c t\u00ednh: MSSV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean, Ng\u00e0y sinh Th\u1ef1c th\u1ec3 Kh\u00f3a h\u1ecdc: Thu\u1ed9c t\u00ednh: Makh\u00f3a h\u1ecdc (Kh\u00f3a ch\u00ednh), T\u00ean kh\u00f3a h\u1ecdc, S\u1ed1 t\u00edn ch\u1ec9 Th\u1ef1c th\u1ec3 Gi\u1ea3ng vi\u00ean: Thu\u1ed9c t\u00ednh: MAGV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean Th\u1ef1c th\u1ec3 Khoa: Thu\u1ed9c t\u00ednh: MAKhoa (Kh\u00f3a ch\u00ednh), T\u00ean khoa Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd l\u00e0 c\u1ea5p \u0111\u1ed9 chi ti\u1ebft v\u00e0 k\u1ef9 thu\u1eadt nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh v\u1ec1 c\u00e1ch tri\u1ec3n khai thi\u1ebft k\u1ebf logic tr\u00ean m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t bao g\u1ed3m ch\u1ec9 m\u1ee5c, l\u01b0u tr\u1eef, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:\u0110\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf v\u1eadt l\u00fd, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u00e0o s\u1ebd s\u1eed d\u1ee5ng (v\u00ed d\u1ee5: MySQL, Oracle, PostgreSQL) v\u00e0 t\u1ea1o ra s\u01a1 \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u1ef1c t\u1ebf. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac b\u1ea3ng c\u1ee5 th\u1ec3, ki\u1ec3u d\u1eef li\u1ec7u, r\u00e0ng bu\u1ed9c v\u00e0 ch\u1ec9 m\u1ee5c. N\u00f3 c\u0169ng bao g\u1ed3m c\u00e1c quy\u1ebft \u0111\u1ecbnh v\u1ec1 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, ph\u00e2n m\u1ea3nh v\u00e0 ki\u1ec3m so\u00e1t truy c\u1eadp. V\u00ed d\u1ee5: B\u1ea3ng Sinh vi\u00ean (Ng\u1eef ph\u00e1p MySQL): sqlSao ch\u00e9p m\u00e3 T\u1ea0O B\u1ea2NG Sinh vi\u00ean ( M\u00e3SinhVi\u00ean INT CH\u00cdNH KH\u00d3A, H\u1ecd VARCHAR(50), T\u00ean \u0111\u1ec7m VARCHAR(50), Ng\u00e0y sinh DATE ); B\u1ea3ng Kh\u00f3a h\u1ecdc: sqlSao ch\u00e9p m\u00e3 T\u1ea0O B\u1ea2NG Kh\u00f3a h\u1ecdc ( M\u00e3Kh\u00f3aH\u1ecdc INT CH\u00cdNH KH\u00d3A, T\u00eanKh\u00f3aH\u1ecdc VARCHAR(100), S\u1ed1T\u00ednCh\u1ec9 INT ); T\u00f3m t\u1eaft c\u00e1c \u0111i\u1ec3m kh\u00e1c bi\u1ec7t B\u1ea3ng sau cung c\u1ea5p c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng v\u1ec1 c\u00e1ch ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1c nhau v\u1ec1 m\u1ee5c \u0111\u00edch, tr\u1ecdng t\u00e2m, t\u00ednh<a href=\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/\" rel=\"bookmark\"><span class=\"screen-reader-text\">\u0110i\u1ec1u h\u01b0\u1edbng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: Kh\u00e1i ni\u1ec7m, Logic v\u00e0 V\u1eadt l\u00fd<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":6445,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","_eb_attr":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[17],"tags":[],"class_list":["post-6444","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-modeling-database"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u0110i\u1ec1u h\u01b0\u1edbng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: Kh\u00e1i ni\u1ec7m, Logic v\u00e0 V\u1eadt l\u00fd - Visual Paradigm Guides Vietnamese<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0110i\u1ec1u h\u01b0\u1edbng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: Kh\u00e1i ni\u1ec7m, Logic v\u00e0 V\u1eadt l\u00fd - Visual Paradigm Guides Vietnamese\" \/>\n<meta property=\"og:description\" content=\"Gi\u1edbi thi\u1ec7u Trong l\u0129nh v\u1ef1c qu\u1ea3n l\u00fd d\u1eef li\u1ec7u, vi\u1ec7c thi\u1ebft k\u1ebf m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ri\u00eang bi\u1ec7t c\u1ee7a m\u1ed9t t\u1ed5 ch\u1ee9c l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 \u0111a chi\u1ec1u. N\u00f3 bao g\u1ed3m m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ea9n th\u1eadn di\u1ec5n ra trong ba giai \u0111o\u1ea1n ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. Ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf n\u00e0y \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng ch\u1ec9 n\u1eafm b\u1eaft b\u1ea3n ch\u1ea5t c\u1ee7a d\u1eef li\u1ec7u m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n, hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ea3o m\u1eadt. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd c\u00f9ng kh\u00e1m ph\u00e1 ba c\u1ea5p \u0111\u1ed9 n\u00e0y, t\u00ecm hi\u1ec3u v\u1ec1 \u00fd ngh\u0129a, s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 c\u00e1ch ch\u00fang ph\u1ed1i h\u1ee3p \u0111\u1ec3 h\u00ecnh th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd. S\u01a1 \u0111\u1ed3 ERD kh\u00e1i ni\u1ec7m so v\u1edbi logic v\u00e0 v\u1eadt l\u00fd C\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin hi\u1ec7n \u0111\u1ea1i, \u0111\u00f3ng vai tr\u00f2 l\u00e0 kho ch\u1ee9a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c v\u00e0 c\u1ea5u tr\u00fac h\u00f3a. Khi thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i tu\u00e2n theo m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u00f3 c\u1ea5u tr\u00fac, bao g\u1ed3m ba c\u1ea5p \u0111\u1ed9 ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. M\u1ed7i c\u1ea5p \u0111\u1ed9 \u0111\u1ec1u c\u00f3 m\u1ee5c \u0111\u00edch ri\u00eang v\u00e0 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd v\u00e0 hi\u1ec7u qu\u1ea3. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u ba c\u1ea5p \u0111\u1ed9 n\u00e0y, ph\u00e2n t\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang v\u00e0 \u0111\u01b0a ra c\u00e1c v\u00ed d\u1ee5 minh h\u1ecda v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a ch\u00fang. Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m l\u00e0 c\u1ea5p \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng cao nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf t\u1eadp trung v\u00e0o vi\u1ec7c hi\u1ec3u r\u00f5 l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1 v\u00e0 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac t\u1ed5ng th\u1ec3 c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. M\u1ee5c ti\u00eau ch\u00ednh l\u00e0 t\u1ea1o ra m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 to\u00e0n di\u1ec7n v\u1ec1 d\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc mu\u1ed1n t\u1ea1o m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 qu\u1ea3n l\u00fd th\u00f4ng tin sinh vi\u00ean. Trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m, v\u1ea5n \u0111\u1ec1 ch\u00ednh l\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 c\u1ee7a ch\u00fang trong b\u1ed1i c\u1ea3nh tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc. C\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean, c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean v\u00e0 c\u00e1c khoa. C\u00e1c m\u1ed1i quan h\u1ec7 c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean \u0111\u0103ng k\u00fd c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y c\u00e1c kh\u00f3a h\u1ecdc v\u00e0 c\u00e1c khoa qu\u1ea3n l\u00fd c\u00e1c kh\u00f3a h\u1ecdc. V\u00ed d\u1ee5: C\u00e1c th\u1ef1c th\u1ec3: Sinh vi\u00ean, Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean, Khoa C\u00e1c m\u1ed1i quan h\u1ec7: Sinh vi\u00ean \u0111\u0103ng k\u00fd Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y Kh\u00f3a h\u1ecdc, Khoa qu\u1ea3n l\u00fd Kh\u00f3a h\u1ecdc Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa c\u1ea5p \u0111\u1ed9 kh\u00e1i ni\u1ec7m v\u00e0 c\u1ea5p \u0111\u1ed9 v\u1eadt l\u00fd. \u1ede \u0111\u00e2y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh kh\u00e1i ni\u1ec7m th\u00e0nh m\u1ed9t bi\u1ec3u di\u1ec5n chi ti\u1ebft h\u01a1n, t\u1eadp trung v\u00e0o c\u1ea5u tr\u00fac d\u1eef li\u1ec7u, c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 r\u00e0ng bu\u1ed9c. Thi\u1ebft k\u1ebf logic \u0111\u1ed9c l\u1eadp v\u1edbi b\u1ea5t k\u1ef3 h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u (DBMS) c\u1ee5 th\u1ec3 n\u00e0o v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng s\u01a1 \u0111\u1ed3 Entiti-Quan h\u1ec7 (ERD) ho\u1eb7c c\u00e1c k\u1ef9 thu\u1eadt m\u00f4 h\u00ecnh h\u00f3a t\u01b0\u01a1ng t\u1ef1. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:Ti\u1ebfp t\u1ee5c v\u1edbi v\u00ed d\u1ee5 tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf logic, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh cho m\u1ed7i th\u1ef1c th\u1ec3 v\u00e0 ch\u1ec9 \u0111\u1ecbnh ki\u1ec3u d\u1eef li\u1ec7u, kh\u00f3a ch\u00ednh v\u00e0 kh\u00f3a ngo\u1ea1i. Giai \u0111o\u1ea1n n\u00e0y c\u0169ng bao g\u1ed3m vi\u1ec7c chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u \u0111\u1ec3 lo\u1ea1i b\u1ecf s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u. V\u00ed d\u1ee5: Th\u1ef1c th\u1ec3 Sinh vi\u00ean: Thu\u1ed9c t\u00ednh: MSSV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean, Ng\u00e0y sinh Th\u1ef1c th\u1ec3 Kh\u00f3a h\u1ecdc: Thu\u1ed9c t\u00ednh: Makh\u00f3a h\u1ecdc (Kh\u00f3a ch\u00ednh), T\u00ean kh\u00f3a h\u1ecdc, S\u1ed1 t\u00edn ch\u1ec9 Th\u1ef1c th\u1ec3 Gi\u1ea3ng vi\u00ean: Thu\u1ed9c t\u00ednh: MAGV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean Th\u1ef1c th\u1ec3 Khoa: Thu\u1ed9c t\u00ednh: MAKhoa (Kh\u00f3a ch\u00ednh), T\u00ean khoa Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd l\u00e0 c\u1ea5p \u0111\u1ed9 chi ti\u1ebft v\u00e0 k\u1ef9 thu\u1eadt nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh v\u1ec1 c\u00e1ch tri\u1ec3n khai thi\u1ebft k\u1ebf logic tr\u00ean m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t bao g\u1ed3m ch\u1ec9 m\u1ee5c, l\u01b0u tr\u1eef, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:\u0110\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf v\u1eadt l\u00fd, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u00e0o s\u1ebd s\u1eed d\u1ee5ng (v\u00ed d\u1ee5: MySQL, Oracle, PostgreSQL) v\u00e0 t\u1ea1o ra s\u01a1 \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u1ef1c t\u1ebf. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac b\u1ea3ng c\u1ee5 th\u1ec3, ki\u1ec3u d\u1eef li\u1ec7u, r\u00e0ng bu\u1ed9c v\u00e0 ch\u1ec9 m\u1ee5c. N\u00f3 c\u0169ng bao g\u1ed3m c\u00e1c quy\u1ebft \u0111\u1ecbnh v\u1ec1 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, ph\u00e2n m\u1ea3nh v\u00e0 ki\u1ec3m so\u00e1t truy c\u1eadp. V\u00ed d\u1ee5: B\u1ea3ng Sinh vi\u00ean (Ng\u1eef ph\u00e1p MySQL): sqlSao ch\u00e9p m\u00e3 T\u1ea0O B\u1ea2NG Sinh vi\u00ean ( M\u00e3SinhVi\u00ean INT CH\u00cdNH KH\u00d3A, H\u1ecd VARCHAR(50), T\u00ean \u0111\u1ec7m VARCHAR(50), Ng\u00e0y sinh DATE ); B\u1ea3ng Kh\u00f3a h\u1ecdc: sqlSao ch\u00e9p m\u00e3 T\u1ea0O B\u1ea2NG Kh\u00f3a h\u1ecdc ( M\u00e3Kh\u00f3aH\u1ecdc INT CH\u00cdNH KH\u00d3A, T\u00eanKh\u00f3aH\u1ecdc VARCHAR(100), S\u1ed1T\u00ednCh\u1ec9 INT ); T\u00f3m t\u1eaft c\u00e1c \u0111i\u1ec3m kh\u00e1c bi\u1ec7t B\u1ea3ng sau cung c\u1ea5p c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng v\u1ec1 c\u00e1ch ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1c nhau v\u1ec1 m\u1ee5c \u0111\u00edch, tr\u1ecdng t\u00e2m, t\u00ednh\u0110i\u1ec1u h\u01b0\u1edbng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: Kh\u00e1i ni\u1ec7m, Logic v\u00e0 V\u1eadt l\u00fd\" \/>\n<meta property=\"og:url\" content=\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/\" \/>\n<meta property=\"og:site_name\" content=\"Visual Paradigm Guides Vietnamese\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-04T12:27:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/guides.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/10\/2026\/02\/img_6507e93556627.png\" \/>\n\t<meta property=\"og:image:width\" content=\"606\" \/>\n\t<meta property=\"og:image:height\" content=\"369\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"vpadmin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/\"},\"headline\":\"\u0110i\u1ec1u h\u01b0\u1edbng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: Kh\u00e1i ni\u1ec7m, Logic v\u00e0 V\u1eadt l\u00fd\",\"datePublished\":\"2026-02-04T12:27:07+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/\"},\"wordCount\":3532,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/guides.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/10\/2026\/02\/img_6507e93556627.png\",\"articleSection\":[\"Data Modeling \/ Database\"],\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/\",\"url\":\"https:\/\/guides.visual-paradigm.com\/vn\/navigating-the-three-levels-of-database-design-conceptual-logical-and-physical\/\",\"name\":\"\u0110i\u1ec1u h\u01b0\u1edbng ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u: Kh\u00e1i ni\u1ec7m, Logic v\u00e0 V\u1eadt l\u00fd - 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N\u00f3 bao g\u1ed3m m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ea9n th\u1eadn di\u1ec5n ra trong ba giai \u0111o\u1ea1n ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. Ba c\u1ea5p \u0111\u1ed9 thi\u1ebft k\u1ebf n\u00e0y \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng ch\u1ec9 n\u1eafm b\u1eaft b\u1ea3n ch\u1ea5t c\u1ee7a d\u1eef li\u1ec7u m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n, hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ea3o m\u1eadt. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd c\u00f9ng kh\u00e1m ph\u00e1 ba c\u1ea5p \u0111\u1ed9 n\u00e0y, t\u00ecm hi\u1ec3u v\u1ec1 \u00fd ngh\u0129a, s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 c\u00e1ch ch\u00fang ph\u1ed1i h\u1ee3p \u0111\u1ec3 h\u00ecnh th\u00e0nh m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd. S\u01a1 \u0111\u1ed3 ERD kh\u00e1i ni\u1ec7m so v\u1edbi logic v\u00e0 v\u1eadt l\u00fd C\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng th\u00f4ng tin hi\u1ec7n \u0111\u1ea1i, \u0111\u00f3ng vai tr\u00f2 l\u00e0 kho ch\u1ee9a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c v\u00e0 c\u1ea5u tr\u00fac h\u00f3a. Khi thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i tu\u00e2n theo m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u00f3 c\u1ea5u tr\u00fac, bao g\u1ed3m ba c\u1ea5p \u0111\u1ed9 ri\u00eang bi\u1ec7t: thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m, logic v\u00e0 v\u1eadt l\u00fd. M\u1ed7i c\u1ea5p \u0111\u1ed9 \u0111\u1ec1u c\u00f3 m\u1ee5c \u0111\u00edch ri\u00eang v\u00e0 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong vi\u1ec7c t\u1ea1o ra m\u1ed9t h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd v\u00e0 hi\u1ec7u qu\u1ea3. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u ba c\u1ea5p \u0111\u1ed9 n\u00e0y, ph\u00e2n t\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang v\u00e0 \u0111\u01b0a ra c\u00e1c v\u00ed d\u1ee5 minh h\u1ecda v\u1ec1 t\u1ea7m quan tr\u1ecdng c\u1ee7a ch\u00fang. Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00e1i ni\u1ec7m l\u00e0 c\u1ea5p \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng cao nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf t\u1eadp trung v\u00e0o vi\u1ec7c hi\u1ec3u r\u00f5 l\u0129nh v\u1ef1c v\u1ea5n \u0111\u1ec1 v\u00e0 x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac t\u1ed5ng th\u1ec3 c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng \u0111i s\u00e2u v\u00e0o chi ti\u1ebft tri\u1ec3n khai k\u1ef9 thu\u1eadt. M\u1ee5c ti\u00eau ch\u00ednh l\u00e0 t\u1ea1o ra m\u1ed9t bi\u1ec3u di\u1ec5n r\u00f5 r\u00e0ng v\u00e0 to\u00e0n di\u1ec7n v\u1ec1 d\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa ch\u00fang. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc mu\u1ed1n t\u1ea1o m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 qu\u1ea3n l\u00fd th\u00f4ng tin sinh vi\u00ean. Trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf kh\u00e1i ni\u1ec7m, v\u1ea5n \u0111\u1ec1 ch\u00ednh l\u00e0 x\u00e1c \u0111\u1ecbnh c\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 c\u1ee7a ch\u00fang trong b\u1ed1i c\u1ea3nh tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc. C\u00e1c th\u1ef1c th\u1ec3 ch\u00ednh c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean, c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean v\u00e0 c\u00e1c khoa. C\u00e1c m\u1ed1i quan h\u1ec7 c\u00f3 th\u1ec3 bao g\u1ed3m sinh vi\u00ean \u0111\u0103ng k\u00fd c\u00e1c kh\u00f3a h\u1ecdc, gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y c\u00e1c kh\u00f3a h\u1ecdc v\u00e0 c\u00e1c khoa qu\u1ea3n l\u00fd c\u00e1c kh\u00f3a h\u1ecdc. V\u00ed d\u1ee5: C\u00e1c th\u1ef1c th\u1ec3: Sinh vi\u00ean, Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean, Khoa C\u00e1c m\u1ed1i quan h\u1ec7: Sinh vi\u00ean \u0111\u0103ng k\u00fd Kh\u00f3a h\u1ecdc, Gi\u1ea3ng vi\u00ean gi\u1ea3ng d\u1ea1y Kh\u00f3a h\u1ecdc, Khoa qu\u1ea3n l\u00fd Kh\u00f3a h\u1ecdc Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u logic l\u00e0 c\u1ea7u n\u1ed1i gi\u1eefa c\u1ea5p \u0111\u1ed9 kh\u00e1i ni\u1ec7m v\u00e0 c\u1ea5p \u0111\u1ed9 v\u1eadt l\u00fd. \u1ede \u0111\u00e2y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf chuy\u1ec3n \u0111\u1ed5i m\u00f4 h\u00ecnh kh\u00e1i ni\u1ec7m th\u00e0nh m\u1ed9t bi\u1ec3u di\u1ec5n chi ti\u1ebft h\u01a1n, t\u1eadp trung v\u00e0o c\u1ea5u tr\u00fac d\u1eef li\u1ec7u, c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 r\u00e0ng bu\u1ed9c. Thi\u1ebft k\u1ebf logic \u0111\u1ed9c l\u1eadp v\u1edbi b\u1ea5t k\u1ef3 h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u (DBMS) c\u1ee5 th\u1ec3 n\u00e0o v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng s\u01a1 \u0111\u1ed3 Entiti-Quan h\u1ec7 (ERD) ho\u1eb7c c\u00e1c k\u1ef9 thu\u1eadt m\u00f4 h\u00ecnh h\u00f3a t\u01b0\u01a1ng t\u1ef1. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:Ti\u1ebfp t\u1ee5c v\u1edbi v\u00ed d\u1ee5 tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf logic, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh c\u00e1c thu\u1ed9c t\u00ednh cho m\u1ed7i th\u1ef1c th\u1ec3 v\u00e0 ch\u1ec9 \u0111\u1ecbnh ki\u1ec3u d\u1eef li\u1ec7u, kh\u00f3a ch\u00ednh v\u00e0 kh\u00f3a ngo\u1ea1i. Giai \u0111o\u1ea1n n\u00e0y c\u0169ng bao g\u1ed3m vi\u1ec7c chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u \u0111\u1ec3 lo\u1ea1i b\u1ecf s\u1ef1 tr\u00f9ng l\u1eb7p v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u. V\u00ed d\u1ee5: Th\u1ef1c th\u1ec3 Sinh vi\u00ean: Thu\u1ed9c t\u00ednh: MSSV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean, Ng\u00e0y sinh Th\u1ef1c th\u1ec3 Kh\u00f3a h\u1ecdc: Thu\u1ed9c t\u00ednh: Makh\u00f3a h\u1ecdc (Kh\u00f3a ch\u00ednh), T\u00ean kh\u00f3a h\u1ecdc, S\u1ed1 t\u00edn ch\u1ec9 Th\u1ef1c th\u1ec3 Gi\u1ea3ng vi\u00ean: Thu\u1ed9c t\u00ednh: MAGV (Kh\u00f3a ch\u00ednh), H\u1ecd, T\u00ean Th\u1ef1c th\u1ec3 Khoa: Thu\u1ed9c t\u00ednh: MAKhoa (Kh\u00f3a ch\u00ednh), T\u00ean khoa Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadt l\u00fd l\u00e0 c\u1ea5p \u0111\u1ed9 chi ti\u1ebft v\u00e0 k\u1ef9 thu\u1eadt nh\u1ea5t trong qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh v\u1ec1 c\u00e1ch tri\u1ec3n khai thi\u1ebft k\u1ebf logic tr\u00ean m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t bao g\u1ed3m ch\u1ec9 m\u1ee5c, l\u01b0u tr\u1eef, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt. M\u00f4 t\u1ea3 v\u1ea5n \u0111\u1ec1:\u0110\u1ed1i v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u tr\u01b0\u1eddng \u0111\u1ea1i h\u1ecdc c\u1ee7a ch\u00fang ta, trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf v\u1eadt l\u00fd, b\u1ea1n s\u1ebd x\u00e1c \u0111\u1ecbnh h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u00e0o s\u1ebd s\u1eed d\u1ee5ng (v\u00ed d\u1ee5: MySQL, Oracle, PostgreSQL) v\u00e0 t\u1ea1o ra s\u01a1 \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u1ef1c t\u1ebf. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u1ea5u tr\u00fac b\u1ea3ng c\u1ee5 th\u1ec3, ki\u1ec3u d\u1eef li\u1ec7u, r\u00e0ng bu\u1ed9c v\u00e0 ch\u1ec9 m\u1ee5c. N\u00f3 c\u0169ng bao g\u1ed3m c\u00e1c quy\u1ebft \u0111\u1ecbnh v\u1ec1 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, ph\u00e2n m\u1ea3nh v\u00e0 ki\u1ec3m so\u00e1t truy c\u1eadp. 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