{"id":1639,"date":"2026-04-07T23:00:28","date_gmt":"2026-04-07T23:00:28","guid":{"rendered":"https:\/\/www.viz-note.com\/vi\/erd-integrity-validation-checklist-dba\/"},"modified":"2026-04-07T23:00:28","modified_gmt":"2026-04-07T23:00:28","slug":"erd-integrity-validation-checklist-dba","status":"publish","type":"post","link":"https:\/\/www.viz-note.com\/vi\/erd-integrity-validation-checklist-dba\/","title":{"rendered":"B\u1ea3n ki\u1ec3m tra b\u00ed m\u1eadt c\u1ee7a c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 x\u00e1c minh t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3"},"content":{"rendered":"

Thi\u1ebft k\u1ebf m\u1ed9t l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd l\u00e0 n\u1ec1n t\u1ea3ng cho \u0111\u1ed9 tin c\u1eady c\u1ee7a b\u1ea5t k\u1ef3 h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m n\u00e0o. S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 (ERD) \u0111\u00f3ng vai tr\u00f2 nh\u01b0 b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf cho ki\u1ebfn tr\u00fac n\u00e0y, chuy\u1ec3n \u0111\u1ed5i c\u00e1c y\u00eau c\u1ea7u kinh doanh tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh c\u00e1c c\u1ea5u tr\u00fac d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. Tuy nhi\u00ean, m\u1ed9t s\u01a1 \u0111\u1ed3 tr\u00ean gi\u1ea5y \u2013 ho\u1eb7c trong c\u00f4ng c\u1ee5 m\u00f4 h\u00ecnh h\u00f3a \u2013 kh\u00f4ng \u0111\u1ea3m b\u1ea3o m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c. Kho\u1ea3ng c\u00e1ch gi\u1eefa thi\u1ebft k\u1ebf v\u00e0 tri\u1ec3n khai th\u01b0\u1eddng d\u1eabn \u0111\u1ebfn c\u00e1c \u0111i\u1ec3m ngh\u1ebdn hi\u1ec7u su\u1ea5t, s\u1ef1 b\u1ea5t nh\u1ea5t d\u1eef li\u1ec7u v\u00e0 c\u00e1c n\u1ed7 l\u1ef1c t\u00e1i c\u1ea5u tr\u00fac t\u1ed1n k\u00e9m trong giai \u0111o\u1ea1n sau c\u1ee7a v\u00f2ng \u0111\u1eddi.<\/p>\n

\u0110\u1ed1i v\u1edbi c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u (DBA) v\u00e0 c\u00e1c ki\u1ebfn tr\u00fac s\u01b0 d\u1eef li\u1ec7u, giai \u0111o\u1ea1n x\u00e1c minh l\u00e0 n\u01a1i c\u00e1c m\u00f4 h\u00ecnh l\u00fd thuy\u1ebft g\u1eb7p ph\u1ea3i c\u00e1c gi\u1edbi h\u1ea1n th\u1ef1c t\u1ebf. H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p m\u1ed9t danh s\u00e1ch ki\u1ec3m tra to\u00e0n di\u1ec7n, mang t\u00ednh k\u1ef9 thu\u1eadt \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3. Ch\u00fang ta s\u1ebd \u0111i xa h\u01a1n ng\u1eef ph\u00e1p c\u01a1 b\u1ea3n \u0111\u1ec3 xem x\u00e9t t\u00ednh nh\u1ea5t qu\u00e1n logic, c\u00e1c ti\u00eau chu\u1ea9n chu\u1ea9n h\u00f3a, vi\u1ec7c th\u1ef1c thi r\u00e0ng bu\u1ed9c v\u00e0 c\u00e1c th\u1ef1c h\u00e0nh t\u00e0i li\u1ec7u h\u00f3a. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 c\u00e1c nguy\u00ean t\u1eafc n\u00e0y, b\u1ea1n s\u1ebd x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c n\u1ec1n t\u1ea3ng v\u1eefng ch\u1eafc h\u1ed7 tr\u1ee3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 b\u1ea3o tr\u00ec m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c nh\u00e0 cung c\u1ea5p ph\u1ea7n m\u1ec1m c\u1ee5 th\u1ec3 hay c\u00e1c c\u00f4ng c\u1ee5 \u0111\u1ed9c quy\u1ec1n.<\/p>\n

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\"Whimsical<\/figure>\n<\/div>\n

1. Ng\u1eef ph\u00e1p c\u1ea5u tr\u00fac v\u00e0 \u0111\u1ecbnh ngh\u0129a l\u01b0\u1ee3c \u0111\u1ed3 \ud83c\udfd7\ufe0f<\/h2>\n

L\u1edbp x\u00e1c minh \u0111\u1ea7u ti\u00ean li\u00ean quan \u0111\u1ebfn c\u00e1c kh\u1ed1i x\u00e2y d\u1ef1ng c\u01a1 b\u1ea3n c\u1ee7a s\u01a1 \u0111\u1ed3. M\u1ecdi th\u1ef1c th\u1ec3 v\u00e0 m\u1ed1i quan h\u1ec7 \u0111\u1ec1u ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc c\u1ea5u tr\u00fac nghi\u00eam ng\u1eb7t. N\u1ebfu ng\u1eef ph\u00e1p b\u1ecb sai, l\u1ec7nh SQL DDL (Ng\u00f4n ng\u1eef \u0111\u1ecbnh ngh\u0129a d\u1eef li\u1ec7u) sinh ra s\u1ebd th\u1ea5t b\u1ea1i ho\u1eb7c t\u1ea1o ra k\u1ebft qu\u1ea3 kh\u00f4ng mong \u0111\u1ee3i.<\/p>\n

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  • Quy t\u1eafc \u0111\u1eb7t t\u00ean th\u1ef1c th\u1ec3:<\/strong> \u0110\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 t\u00ean th\u1ef1c th\u1ec3 tu\u00e2n theo ti\u00eau chu\u1ea9n \u0111\u1eb7t t\u00ean nh\u1ea5t qu\u00e1n. Danh t\u1eeb s\u1ed1 \u00edt th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u01b0u ti\u00ean cho c\u00e1c th\u1ef1c th\u1ec3 (v\u00ed d\u1ee5 nh\u01b0 Kh\u00e1ch h\u00e0ng<\/code> thay v\u00ec Kh\u00e1ch h\u00e0ng<\/code>) \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c m\u1eabu m\u00f4 h\u00ecnh h\u00f3a h\u01b0\u1edbng \u0111\u1ed1i t\u01b0\u1ee3ng. Tr\u00e1nh s\u1eed d\u1ee5ng k\u00fd t\u1ef1 \u0111\u1eb7c bi\u1ec7t, kho\u1ea3ng tr\u1eafng ho\u1eb7c t\u1eeb kh\u00f3a \u0111\u01b0\u1ee3c b\u1ea3o l\u01b0u.<\/li>\n
  • T\u00ednh nh\u1ea5t qu\u00e1n trong \u0111\u1eb7t t\u00ean b\u1ea3ng:<\/strong> \u00c1nh x\u1ea1 c\u00e1c th\u1ef1c th\u1ec3 tr\u1ef1c ti\u1ebfp sang t\u00ean b\u1ea3ng. X\u00e1c minh r\u1eb1ng vi\u1ec7c \u00e1nh x\u1ea1 l\u00e0 m\u1ed9t-m\u1ed9t, tr\u1eeb khi chi\u1ebfn l\u01b0\u1ee3c chu\u1ea9n h\u00f3a c\u1ee5 th\u1ec3 y\u00eau c\u1ea7u kh\u00e1c. Ki\u1ec3m tra c\u00e1c va ch\u1ea1m t\u00ean khi c\u00e1c th\u1ef1c th\u1ec3 kh\u00e1c nhau c\u00f3 th\u1ec3 \u00e1nh x\u1ea1 sang c\u00f9ng m\u1ed9t t\u00ean b\u1ea3ng.<\/li>\n
  • X\u00e1c \u0111\u1ecbnh Kh\u00f3a ch\u00ednh:<\/strong> M\u1ed7i b\u1ea3ng \u0111\u1ec1u ph\u1ea3i c\u00f3 m\u1ed9t Kh\u00f3a ch\u00ednh (PK) \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. Kh\u00f4ng c\u00f3 \u0111\u1ecbnh danh duy nh\u1ea5t, c\u00e1c h\u00e0ng kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c, d\u1eabn \u0111\u1ebfn vi ph\u1ea1m t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u. \u0110\u1ea3m b\u1ea3o kh\u00f3a ch\u00ednh kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p null.<\/li>\n
  • \u0110\u1ed9 \u0111\u1ea7y \u0111\u1ee7 thu\u1ed9c t\u00ednh:<\/strong> X\u00e1c minh r\u1eb1ng m\u1ed7i th\u1ef1c th\u1ec3 \u0111\u1ec1u c\u00f3 thu\u1ed9c t\u00ednh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. C\u00e1c th\u1ef1c th\u1ec3 tr\u1ed1ng th\u01b0\u1eddng cho th\u1ea5y s\u1ef1 hi\u1ec3u l\u1ea7m v\u1ec1 l\u0129nh v\u1ef1c kinh doanh ho\u1eb7c m\u00f4 h\u00ecnh d\u1eef li\u1ec7u ch\u01b0a ho\u00e0n ch\u1ec9nh.<\/li>\n
  • \u0110\u1ed9 ch\u00ednh x\u00e1c ki\u1ec3u d\u1eef li\u1ec7u:<\/strong> Ki\u1ec3m tra xem c\u00e1c ki\u1ec3u d\u1eef li\u1ec7u c\u00f3 c\u1ee5 th\u1ec3 hay kh\u00f4ng. Tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c ki\u1ec3u chung nh\u01b0 TEXT<\/code> ho\u1eb7c INT<\/code> khi \u0111\u1ed9 ch\u00ednh x\u00e1c l\u00e0 quan tr\u1ecdng. S\u1eed d\u1ee5ng VARCHAR(n)<\/code> v\u1edbi \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh v\u00e0 DECIMAL(p, s)<\/code> cho d\u1eef li\u1ec7u t\u00e0i ch\u00ednh.<\/li>\n<\/ul>\n

    2. Kh\u00f3a, r\u00e0ng bu\u1ed9c v\u00e0 t\u00ednh to\u00e0n v\u1eb9n tham chi\u1ebfu \ud83d\udd11<\/h2>\n

    C\u00e1c kh\u00f3a l\u00e0 c\u01a1 ch\u1ebf gi\u1eef cho c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadn h\u00e0nh \u1ed5n \u0111\u1ecbnh. Kh\u00f3a ngo\u1ea1i (FK) t\u1ea1o ra c\u00e1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c b\u1ea3ng, \u0111\u1ea3m b\u1ea3o c\u00e1c m\u1ed1i quan h\u1ec7. Vi\u1ec7c x\u00e1c minh c\u00e1c r\u00e0ng bu\u1ed9c n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 ch\u00ednh x\u00e1c d\u1eef li\u1ec7u.<\/p>\n

      \n
    • S\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a Kh\u00f3a ngo\u1ea1i:<\/strong> X\u00e1c nh\u1eadn r\u1eb1ng m\u1ed7i \u0111\u01b0\u1eddng quan h\u1ec7 trong s\u01a1 \u0111\u1ed3 ERD t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed9t r\u00e0ng bu\u1ed9c Kh\u00f3a ngo\u1ea1i trong l\u01b0\u1ee3c \u0111\u1ed3. C\u00e1c kh\u00f3a ngo\u1ea1i b\u1ecb thi\u1ebfu s\u1ebd l\u00e0m h\u1ecfng t\u00ednh to\u00e0n v\u1eb9n tham chi\u1ebfu, cho ph\u00e9p c\u00e1c b\u1ea3n ghi b\u1ecb t\u00e1ch r\u1eddi.<\/li>\n
    • V\u1ec1 c\u00e1c h\u00e0nh \u0111\u1ed9ng X\u00f3a\/C\u1eadp nh\u1eadt:<\/strong> X\u00e1c \u0111\u1ecbnh h\u00e0nh vi c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u khi m\u1ed9t b\u1ea3n ghi cha b\u1ecb x\u00f3a ho\u1eb7c c\u1eadp nh\u1eadt. C\u00e1c h\u00e0nh \u0111\u1ed9ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m CASCADE<\/code>, SET NULL<\/code>, ho\u1eb7c RESTRICT<\/code>. S\u01a1 \u0111\u1ed3 ERD ph\u1ea3i ghi r\u00f5 c\u00e1c h\u00e0nh vi n\u00e0y.<\/li>\n
    • Kh\u00f3a h\u1ee3p th\u00e0nh:<\/strong> N\u1ebfu kh\u00f3a ch\u00ednh g\u1ed3m nhi\u1ec1u c\u1ed9t, h\u00e3y x\u00e1c minh r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u1ec1u c\u1ea7n thi\u1ebft. Tr\u00e1nh tr\u00f9ng l\u1eb7p. Ki\u1ec3m tra xem c\u00e1c kh\u00f3a ngo\u1ea1i tham chi\u1ebfu \u0111\u1ebfn kh\u00f3a h\u1ee3p th\u00e0nh c\u00f3 bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c c\u1ed9t c\u1ee7a kh\u00f3a ch\u00ednh cha hay kh\u00f4ng.<\/li>\n
    • R\u00e0ng bu\u1ed9c duy nh\u1ea5t:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1c tr\u01b0\u1eddng ph\u1ea3i duy nh\u1ea5t tr\u00ean to\u00e0n b\u1ea3ng nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 kh\u00f3a ch\u00ednh. V\u00ed d\u1ee5 nh\u01b0 \u0111\u1ecba ch\u1ec9 email ho\u1eb7c s\u1ed1 \u0111\u1ecbnh danh qu\u1ed1c gia. \u0110\u1ea3m b\u1ea3o c\u00e1c tr\u01b0\u1eddng n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u l\u00e0 UNIQUE<\/code> trong thi\u1ebft k\u1ebf.<\/li>\n
    • R\u00e0ng bu\u1ed9c ki\u1ec3m tra:<\/strong> X\u00e1c minh c\u00e1c quy t\u1eafc kinh doanh m\u00e0 ch\u1ec9 b\u1eb1ng ki\u1ec3u d\u1eef li\u1ec7u th\u00ec kh\u00f4ng th\u1ec3 th\u1ef1c thi \u0111\u01b0\u1ee3c. V\u00ed d\u1ee5 bao g\u1ed3m ph\u1ea1m vi tu\u1ed5i, m\u00e3 tr\u1ea1ng th\u00e1i ho\u1eb7c gi\u1edbi h\u1ea1n ph\u1ea7n tr\u0103m.<\/li>\n<\/ul>\n

      3. Cardinality v\u00e0 logic quan h\u1ec7 \ud83d\udd04<\/h2>\n

      C\u00e1c m\u1ed1i quan h\u1ec7 x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau. Cardinality x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u0111a c\u00e1c b\u1ea3n ghi c\u1ee7a m\u1ed9t th\u1ef1c th\u1ec3 c\u00f3 th\u1ec3 li\u00ean k\u1ebft v\u1edbi c\u00e1c b\u1ea3n ghi c\u1ee7a th\u1ef1c th\u1ec3 kh\u00e1c. Vi\u1ec7c hi\u1ec3u sai cardinality l\u00e0 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn d\u1eabn \u0111\u1ebfn m\u1ea5t d\u1eef li\u1ec7u ho\u1eb7c d\u01b0 th\u1eeba d\u1eef li\u1ec7u.<\/p>\n

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      • M\u1ed9t-\u0111\u1ed1i-m\u1ed9t (1:1):<\/strong> \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi m\u1ed9t b\u1ea3n ghi trong m\u1ed9t b\u1ea3ng t\u01b0\u01a1ng \u1ee9ng ch\u00ednh x\u00e1c v\u1edbi m\u1ed9t b\u1ea3n ghi trong b\u1ea3ng kh\u00e1c. X\u00e1c minh r\u1eb1ng \u0111i\u1ec1u n\u00e0y th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft v\u00e0 kh\u00f4ng ph\u1ea3i l\u00e0 tr\u01b0\u1eddng h\u1ee3p n\u00ean g\u1ed9p c\u00e1c b\u1ea3ng l\u1ea1i v\u1edbi nhau.<\/li>\n
      • M\u1ed9t-\u0111\u1ed1i-nhi\u1ec1u (1:N):<\/strong> M\u1ed1i quan h\u1ec7 ph\u1ed5 bi\u1ebfn nh\u1ea5t. X\u00e1c minh r\u1eb1ng kh\u00f3a ngo\u1ea1i n\u1eb1m \u1edf b\u1ea3ng ph\u00eda “nhi\u1ec1u”. \u0110\u1ea3m b\u1ea3o kh\u00f3a ngo\u1ea1i c\u00f3 th\u1ec3 l\u00e0 null n\u1ebfu m\u1ed1i quan h\u1ec7 l\u00e0 t\u00f9y ch\u1ecdn.<\/li>\n
      • Nhi\u1ec1u-\u0111\u1ed1i-nhi\u1ec1u (M:N):<\/strong> C\u00e1c m\u1ed1i quan h\u1ec7 M:N tr\u1ef1c ti\u1ebfp l\u00e0 kh\u00f4ng th\u1ec3 v\u1ec1 m\u1eb7t v\u1eadt l\u00fd trong c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7. Ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft th\u00e0nh m\u1ed9t th\u1ef1c th\u1ec3 ph\u1ee5 tr\u1ee3 (b\u1ea3ng li\u00ean k\u1ebft) ch\u1ee9a hai kh\u00f3a ngo\u1ea1i.<\/li>\n
      • T\u00f9y ch\u1ecdn so v\u1edbi B\u1eaft bu\u1ed9c:<\/strong> Ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c m\u1ed1i quan h\u1ec7 t\u00f9y ch\u1ecdn (kh\u00f3a ngo\u1ea1i c\u00f3 th\u1ec3 l\u00e0 null) v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 b\u1eaft bu\u1ed9c (kh\u00f3a ngo\u1ea1i kh\u00f4ng th\u1ec3 l\u00e0 null). \u0110i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn y\u00eau c\u1ea7u nh\u1eadp d\u1eef li\u1ec7u.<\/li>\n
      • M\u1ed1i quan h\u1ec7 \u0111\u1ec7 quy:<\/strong> \u0110\u1ed1i v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 li\u00ean k\u1ebft v\u1edbi ch\u00ednh n\u00f3 (v\u00ed d\u1ee5: Nh\u00e2n vi\u00ean qu\u1ea3n l\u00fd nh\u00e2n vi\u00ean), \u0111\u1ea3m b\u1ea3o kh\u00f3a ngo\u1ea1i tr\u1ecf tr\u1edf l\u1ea1i kh\u00f3a ch\u00ednh c\u1ee7a c\u00f9ng m\u1ed9t b\u1ea3ng.<\/li>\n<\/ul>\n

        4. Chu\u1ea9n h\u00f3a v\u00e0 d\u01b0 th\u1eeba d\u1eef li\u1ec7u \ud83d\udcc9<\/h2>\n

        Chu\u1ea9n h\u00f3a gi\u1ea3m thi\u1ec3u s\u1ef1 tr\u00f9ng l\u1eb7p d\u1eef li\u1ec7u v\u00e0 c\u1ea3i thi\u1ec7n t\u00ednh to\u00e0n v\u1eb9n. M\u1eb7c d\u00f9 \u0111\u00f4i khi t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t y\u00eau c\u1ea7u lo\u1ea1i b\u1ecf chu\u1ea9n h\u00f3a, nh\u01b0ng thi\u1ebft k\u1ebf c\u01a1 b\u1ea3n n\u00ean \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a.<\/p>\n

          \n
        • D\u1ea1ng chu\u1ea9n th\u1ee9 nh\u1ea5t (1NF):<\/strong> \u0110\u1ea3m b\u1ea3o t\u00ednh nguy\u00ean t\u1eed. Kh\u00f4ng c\u00f3 nh\u00f3m l\u1eb7p l\u1ea1i hay m\u1ea3ng trong m\u1ed9t \u00f4 duy nh\u1ea5t. M\u1ed7i c\u1ed9t ph\u1ea3i ch\u1ee9a m\u1ed9t gi\u00e1 tr\u1ecb duy nh\u1ea5t.<\/li>\n
        • D\u1ea1ng chu\u1ea9n th\u1ee9 hai (2NF):<\/strong> T\u1ea5t c\u1ea3 c\u00e1c thu\u1ed9c t\u00ednh kh\u00f4ng kh\u00f3a ph\u1ea3i ph\u1ee5 thu\u1ed9c v\u00e0o to\u00e0n b\u1ed9 Kh\u00f3a ch\u00ednh. V\u1edbi c\u00e1c kh\u00f3a k\u1ebft h\u1ee3p, h\u00e3y ki\u1ec3m tra c\u00e1c ph\u1ee5 thu\u1ed9c t\u1eebng ph\u1ea7n.<\/li>\n
        • D\u1ea1ng chu\u1ea9n th\u1ee9 ba (3NF):<\/strong> C\u00e1c thu\u1ed9c t\u00ednh kh\u00f4ng kh\u00f3a ph\u1ea3i ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o Kh\u00f3a ch\u00ednh. Lo\u1ea1i b\u1ecf c\u00e1c ph\u1ee5 thu\u1ed9c b\u1eafc c\u1ea7u n\u01a1i m\u1ed9t thu\u1ed9c t\u00ednh ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t thu\u1ed9c t\u00ednh kh\u00f4ng kh\u00f3a kh\u00e1c.<\/li>\n
        • D\u1ea1ng chu\u1ea9n Boyce-Codd (BCNF):<\/strong> M\u1ed9t phi\u00ean b\u1ea3n nghi\u00eam ng\u1eb7t h\u01a1n c\u1ee7a 3NF. \u0110\u1ea3m b\u1ea3o m\u1ecdi y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ec1u l\u00e0 kh\u00f3a kh\u1ea3 d\u1ee5ng. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c l\u01b0\u1ee3c \u0111\u1ed3 ph\u1ee9c t\u1ea1p.<\/li>\n
        • Xem x\u00e9t l\u1ea1i vi\u1ec7c lo\u1ea1i b\u1ecf chu\u1ea9n h\u00f3a:<\/strong> N\u1ebfu thi\u1ebft k\u1ebf bao g\u1ed3m c\u00e1c b\u1ea3ng kh\u00f4ng \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a, h\u00e3y x\u00e1c minh r\u1eb1ng s\u1ef1 tr\u00f9ng l\u1eb7p l\u00e0 c\u00f3 ch\u1ee7 \u00fd v\u00e0 \u0111\u01b0\u1ee3c ghi ch\u00e9p r\u00f5 r\u00e0ng. L\u00ean k\u1ebf ho\u1ea1ch s\u1eed d\u1ee5ng trigger ho\u1eb7c logic \u1ee9ng d\u1ee5ng \u0111\u1ec3 duy tr\u00ec s\u1ef1 \u0111\u1ed3ng b\u1ed9 h\u00f3a c\u1ee7a d\u1eef li\u1ec7u tr\u00f9ng l\u1eb7p.<\/li>\n<\/ul>\n

          5. Ti\u00eau chu\u1ea9n \u0111\u1eb7t t\u00ean v\u00e0 t\u00ednh d\u1ec5 \u0111\u1ecdc \ud83d\udcdd<\/h2>\n

          T\u00ednh nh\u1ea5t qu\u00e1n trong \u0111\u1eb7t t\u00ean gi\u00fap ng\u0103n ng\u1eeba s\u1ef1 nh\u1ea7m l\u1eabn gi\u1eefa c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean. M\u1ed9t quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean h\u1ed7n lo\u1ea1n d\u1eabn \u0111\u1ebfn l\u1ed7i trong qu\u00e1 tr\u00ecnh ph\u00e1t tri\u1ec3n v\u00e0 b\u1ea3o tr\u00ec.<\/p>\n

            \n
          • Snake Case so v\u1edbi Camel Case:<\/strong> \u00c1p d\u1ee5ng m\u1ed9t chu\u1ea9n (v\u00ed d\u1ee5 nh\u01b0 snake_case<\/code> cho b\u1ea3ng, PascalCase<\/code> cho c\u00e1c th\u1ef1c th\u1ec3). Ghi ch\u00fa quy t\u1eafc n\u00e0y trong t\u1eeb \u0111i\u1ec3n d\u1eef li\u1ec7u.<\/li>\n
          • Ti\u1ec1n t\u1ed1 v\u00e0 h\u1eadu t\u1ed1:<\/strong> S\u1eed d\u1ee5ng ti\u1ec1n t\u1ed1 chu\u1ea9n cho c\u00e1c lo\u1ea1i b\u1ea3ng c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 tbl_<\/code> cho b\u1ea3ng ho\u1eb7c v_<\/code> cho c\u00e1c view. Tr\u00e1nh s\u1eed d\u1ee5ng ti\u1ec1n t\u1ed1 ri\u00eang t\u01b0 khi\u1ebfn l\u01b0\u1ee3c \u0111\u1ed3 b\u1ecb r\u00e0ng bu\u1ed9c v\u1edbi m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee5 th\u1ec3.<\/li>\n
          • Ki\u1ec3m so\u00e1t vi\u1ebft t\u1eaft:<\/strong> H\u1ea1n ch\u1ebf vi\u1ebft t\u1eaft ch\u1ec9 \u1edf c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh ph\u1ed5 bi\u1ebfn. X\u00e1c \u0111\u1ecbnh t\u1ea5t c\u1ea3 c\u00e1c vi\u1ebft t\u1eaft trong t\u00e0i li\u1ec7u. Tr\u00e1nh s\u1eed d\u1ee5ng ng\u00f4n ng\u1eef n\u1ed9i b\u1ed9.<\/li>\n
          • T\u00ean thu\u1ed9c t\u00ednh nh\u1ea5t qu\u00e1n:<\/strong> \u0110\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c thu\u1ed9c t\u00ednh c\u00f3 c\u00f9ng \u00fd ngh\u0129a tr\u00ean c\u00e1c b\u1ea3ng c\u00f3 t\u00ean nh\u1ea5t qu\u00e1n (v\u00ed d\u1ee5 nh\u01b0 created_at<\/code> so v\u1edbi ng\u00e0y_t\u1ea1o<\/code>). Chu\u1ea9n h\u00f3a theo m\u1ed9t \u0111\u1ecbnh d\u1ea1ng.<\/li>\n<\/ul>\n

            6. Xem x\u00e9t hi\u1ec7u su\u1ea5t v\u00e0 ch\u1ec9 m\u1ee5c \ud83d\ude80<\/h2>\n

            M\u1eb7c d\u00f9 ERD ch\u1ee7 y\u1ebfu mang t\u00ednh logic, n\u00f3 ph\u1ea3i t\u00ednh \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u1eadt l\u00fd. M\u1ed9t thi\u1ebft k\u1ebf \u0111\u1eb9p nh\u01b0ng kh\u00f4ng th\u1ec3 x\u1eed l\u00fd t\u1ea3i l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf th\u1ea5t b\u1ea1i.<\/p>\n

              \n
            • Ch\u1ec9 m\u1ee5c Kh\u00f3a ngo\u1ea1i:<\/strong>Kh\u00f3a ngo\u1ea1i g\u1ea7n nh\u01b0 lu\u00f4n ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ec9 m\u1ee5c. \u0110i\u1ec1u n\u00e0y l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p n\u1ed1i v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n tham chi\u1ebfu. Ki\u1ec3m tra xem ERD c\u00f3 ch\u1ec9 ra c\u00e1c ch\u1ec9 m\u1ee5c tr\u00ean c\u00e1c c\u1ed9t kh\u00f3a ngo\u1ea1i hay kh\u00f4ng.<\/li>\n
            • C\u00e1c c\u1ed9t t\u00ecm ki\u1ebfm:<\/strong> X\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ed9t th\u01b0\u1eddng xuy\u00ean \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong WHERE<\/code> c\u00e1c m\u1ec7nh \u0111\u1ec1 ho\u1eb7c JOIN<\/code> c\u00e1c \u0111i\u1ec1u ki\u1ec7n. \u0110\u1ea3m b\u1ea3o ch\u00fang \u0111\u01b0\u1ee3c ch\u1ec9 m\u1ee5c trong k\u1ebf ho\u1ea1ch thi\u1ebft k\u1ebf.<\/li>\n
            • Chi\u1ebfn l\u01b0\u1ee3c ph\u00e2n v\u00f9ng:<\/strong> \u0110\u1ed1i v\u1edbi c\u00e1c b\u1ea3ng l\u1edbn, h\u00e3y c\u00e2n nh\u1eafc c\u00e1c kh\u00f3a ph\u00e2n v\u00f9ng. ERD n\u00ean l\u00e0m n\u1ed5i b\u1eadt c\u00e1c c\u1ed9t x\u00e1c \u0111\u1ecbnh ph\u00e2n b\u1ed1 d\u1eef li\u1ec7u.<\/li>\n
            • Tr\u00e1nh ch\u1ec9 m\u1ee5c qu\u00e1 m\u1ee9c:<\/strong> Nhi\u1ec1u ch\u1ec9 m\u1ee5c h\u01a1n c\u00f3 ngh\u0129a l\u00e0 ghi d\u1eef li\u1ec7u ch\u1eadm h\u01a1n. X\u00e1c minh r\u1eb1ng c\u00e1c ch\u1ec9 m\u1ee5c l\u00e0 c\u1ea7n thi\u1ebft v\u00e0 kh\u00f4ng tr\u00f9ng l\u1eb7p.<\/li>\n<\/ul>\n

              7. T\u00e0i li\u1ec7u v\u00e0 ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n \ud83d\udcc2<\/h2>\n

              M\u1ed9t m\u00f4 h\u00ecnh kh\u00f4ng c\u00f3 t\u00e0i li\u1ec7u l\u00e0 m\u1ed9t r\u1ee7i ro. ERD ph\u1ea3i \u0111\u01b0\u1ee3c coi l\u00e0 t\u00e0i li\u1ec7u s\u1ed1ng, thay \u0111\u1ed5i theo h\u1ec7 th\u1ed1ng.<\/p>\n

                \n
              • T\u1eeb \u0111i\u1ec3n d\u1eef li\u1ec7u:<\/strong> Duy tr\u00ec m\u00f4 t\u1ea3 chi ti\u1ebft cho m\u1ed7i b\u1ea3ng v\u00e0 c\u1ed9t. Bao g\u1ed3m \u0111\u1ecbnh ngh\u0129a kinh doanh, ki\u1ec3u d\u1eef li\u1ec7u v\u00e0 r\u00e0ng bu\u1ed9c.<\/li>\n
              • L\u1ecbch s\u1eed thay \u0111\u1ed5i:<\/strong> Ghi l\u1ea1i m\u1ecdi thay \u0111\u1ed5i \u0111\u1ed1i v\u1edbi l\u01b0\u1ee3c \u0111\u1ed3. Ghi ch\u00fa ng\u00e0y, t\u00e1c gi\u1ea3 v\u00e0 l\u00fd do thay \u0111\u1ed5i. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng cho vi\u1ec7c g\u1ee1 l\u1ed7i v\u00e0 ki\u1ec3m to\u00e1n.<\/li>\n
              • R\u00f5 r\u00e0ng v\u1ec1 m\u1eb7t tr\u1ef1c quan:<\/strong> \u0110\u1ea3m b\u1ea3o s\u01a1 \u0111\u1ed3 d\u1ec5 \u0111\u1ecdc. Tr\u00e1nh c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o nhau n\u1ebfu c\u00f3 th\u1ec3. S\u1eed d\u1ee5ng nh\u00f3m \u0111\u1ec3 t\u00e1ch bi\u1ec7t c\u00e1c mi\u1ec1n logic.<\/li>\n
              • Nh\u00e3n phi\u00ean b\u1ea3n:<\/strong> G\u00e1n s\u1ed1 phi\u00ean b\u1ea3n cho ch\u00ednh ERD. Kh\u00f4ng ghi \u0111\u00e8 phi\u00ean b\u1ea3n tr\u01b0\u1edbc m\u00e0 kh\u00f4ng l\u01b0u tr\u1eef n\u00f3.<\/li>\n<\/ul>\n

                T\u00f3m t\u1eaft danh s\u00e1ch ki\u1ec3m tra x\u00e1c th\u1ef1c \ud83d\udccb<\/h2>\n

                S\u1eed d\u1ee5ng b\u1ea3ng n\u00e0y \u0111\u1ec3 theo d\u00f5i ti\u1ebfn \u0111\u1ed9 x\u00e1c th\u1ef1c c\u1ee7a b\u1ea1n tr\u01b0\u1edbc khi tri\u1ec3n khai l\u01b0\u1ee3c \u0111\u1ed3 l\u00ean m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                Th\u1ec3 lo\u1ea1i<\/th>\nKi\u1ec3m tra m\u1ee5c<\/th>\nTr\u1ea1ng th\u00e1i<\/th>\nGhi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n
                C\u1ea5u tr\u00fac<\/td>\nT\u1ea5t c\u1ea3 c\u00e1c b\u1ea3ng \u0111\u1ec1u c\u00f3 Kh\u00f3a ch\u00ednh<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                C\u1ea5u tr\u00fac<\/td>\nKh\u00f3a ch\u00ednh kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u1ec3 tr\u1ed1ng<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                Kh\u00f3a<\/td>\nKh\u00f3a ngo\u1ea1i ph\u1ea3i kh\u1edbp v\u1edbi Kh\u00f3a ch\u00ednh c\u1ee7a b\u1ea3ng cha<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                Kh\u00f3a<\/td>\nC\u00e1c h\u00e0nh \u0111\u1ed9ng tham chi\u1ebfu \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                M\u1ed1i quan h\u1ec7<\/td>\nM:N \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft th\u00e0nh B\u1ea3ng giao nhau<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                M\u1ed1i quan h\u1ec7<\/td>\n\u0110\u1ed9 cardinality (Min\/Max) \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                Chu\u1ea9n h\u00f3a<\/td>\nKh\u00f4ng c\u00f3 ph\u1ee5 thu\u1ed9c b\u1eafc c\u1ea7u<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                Chu\u1ea9n h\u00f3a<\/td>\nGi\u00e1 tr\u1ecb nguy\u00ean t\u1eed (1NF)<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                Hi\u1ec7u su\u1ea5t<\/td>\nC\u00e1c c\u1ed9t kh\u00f3a ngo\u1ea1i \u0111\u01b0\u1ee3c ch\u1ec9 m\u1ee5c<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n
                T\u00e0i li\u1ec7u<\/td>\nM\u00f4 t\u1ea3 c\u1ed9t hi\u1ec7n di\u1ec7n<\/td>\n\u2610<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                Nh\u1eefng sai l\u1ea7m v\u00e0 l\u1ed7i ph\u1ed5 bi\u1ebfn \u26a0\ufe0f<\/h2>\n

                Tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn n\u00e0y v\u00ec ch\u00fang l\u00e0m t\u1ed5n h\u1ea1i \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u01a1 \u0111\u1ed3.<\/p>\n\n\n\n\n\n\n\n\n\n
                Lo\u1ea1i l\u1ed7i<\/th>\nM\u00f4 t\u1ea3<\/th>\nT\u00e1c \u0111\u1ed9ng<\/th>\n<\/tr>\n<\/thead>\n
                Thi\u1ebfu kh\u00f3a ngo\u1ea1i<\/td>\nM\u1ed1i quan h\u1ec7 t\u1ed3n t\u1ea1i v\u1ec1 m\u1eb7t tr\u1ef1c quan nh\u01b0ng kh\u00f4ng c\u00f3 r\u00e0ng bu\u1ed9c trong c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/td>\nD\u1eef li\u1ec7u b\u1ecb b\u1ecf r\u01a1i, d\u1eef li\u1ec7u b\u1ecb h\u1ecfng<\/td>\n<\/tr>\n
                Kh\u00f3a ch\u00ednh d\u01b0 th\u1eeba<\/td>\nNhi\u1ec1u kh\u00f3a \u1ee9ng vi\u00ean m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 l\u1ef1a ch\u1ecdn r\u00f5 r\u00e0ng<\/td>\nS\u1ef1 nh\u1ea7m l\u1eabn, v\u1ea5n \u0111\u1ec1 hi\u1ec7u su\u1ea5t<\/td>\n<\/tr>\n
                Ph\u1ee5 thu\u1ed9c v\u00f2ng l\u1eb7p<\/td>\nB\u1ea3ng A tham chi\u1ebfu B, B tham chi\u1ebfu A, A tham chi\u1ebfu B<\/td>\nTh\u1ea5t b\u1ea1i tri\u1ec3n khai, r\u1ee7i ro k\u1eb9t h\u00e0ng<\/td>\n<\/tr>\n
                M\u1ed1i quan h\u1ec7 ng\u1ea7m<\/td>\nL\u00f4gic \u0111\u01b0\u1ee3c ng\u1ee5 \u00fd nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c m\u00f4 h\u00ecnh h\u00f3a r\u00f5 r\u00e0ng<\/td>\nL\u1ed7i \u1ee9ng d\u1ee5ng, d\u1eef li\u1ec7u m\u01a1 h\u1ed3<\/td>\n<\/tr>\n
                \u0110\u1ed9 cardinality qu\u00e1 cao<\/td>\nM\u1ed1i quan h\u1ec7 \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u l\u00e0 1:1 khi th\u1ef1c t\u1ebf l\u00e0 1:N<\/td>\nM\u1ea5t d\u1eef li\u1ec7u, kh\u00f4ng th\u1ec3 l\u01b0u tr\u1eef nhi\u1ec1u gi\u00e1 tr\u1ecb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                Chi\u1ebfn l\u01b0\u1ee3c tri\u1ec3n khai v\u00e0 ki\u1ec3m th\u1eed \ud83e\uddea<\/h2>\n

                Vi\u1ec7c x\u00e1c th\u1ef1c kh\u00f4ng k\u1ebft th\u00fac khi c\u00f3 s\u01a1 \u0111\u1ed3. N\u00f3 ti\u1ebfp t\u1ee5c trong giai \u0111o\u1ea1n tri\u1ec3n khai.<\/p>\n

                  \n
                • T\u1ea1o l\u01b0\u1ee3c \u0111\u1ed3:<\/strong> S\u1eed d\u1ee5ng ERD \u0111\u1ec3 t\u1ea1o c\u00e1c t\u1eadp l\u1ec7nh DDL. Xem x\u00e9t l\u1ea1i SQL \u0111\u01b0\u1ee3c sinh ra m\u1ed9t c\u00e1ch th\u1ee7 c\u00f4ng. C\u00e1c c\u00f4ng c\u1ee5 t\u1ef1 \u0111\u1ed9ng c\u00f3 th\u1ec3 t\u1ea1o ra l\u1ed7i ho\u1eb7c gi\u1ea3 \u0111\u1ecbnh.<\/li>\n
                • Ki\u1ec3m th\u1eed di chuy\u1ec3n d\u1eef li\u1ec7u:<\/strong> Ki\u1ec3m th\u1eed l\u01b0\u1ee3c \u0111\u1ed3 v\u1edbi m\u1ed9t b\u1ed9 d\u1eef li\u1ec7u m\u1eabu. \u0110\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ea3i \u0111\u00fang v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 \u0111\u01b0\u1ee3c duy tr\u00ec.<\/li>\n
                • Th\u1ef1c thi r\u00e0ng bu\u1ed9c:<\/strong> Vi\u1ebft c\u00e1c k\u1ecbch b\u1ea3n \u0111\u1ec3 c\u1ed1 \u00fd vi ph\u1ea1m c\u00e1c r\u00e0ng bu\u1ed9c. \u0110\u1ea3m b\u1ea3o c\u01a1 s\u1edf d\u1eef li\u1ec7u t\u1eeb ch\u1ed1i d\u1eef li\u1ec7u nh\u01b0 mong \u0111\u1ee3i.<\/li>\n
                • Ki\u1ec3m th\u1eed n\u1ed1i k\u1ebft:<\/strong> Th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p n\u1ed1i ph\u1ee9c t\u1ea1p \u0111\u1ec3 x\u00e1c minh r\u1eb1ng c\u00e1c m\u1ed1i quan h\u1ec7 tr\u1ea3 v\u1ec1 c\u00e1c t\u1eadp k\u1ebft qu\u1ea3 \u0111\u00fang. Ki\u1ec3m tra c\u00e1c t\u00edch Descartes ph\u00e1t sinh do thi\u1ebfu r\u00e0ng bu\u1ed9c.<\/li>\n
                • Ph\u00e2n t\u00edch hi\u1ec7u n\u0103ng:<\/strong> Ch\u1ea1y c\u00e1c truy v\u1ea5n tr\u00ean l\u01b0\u1ee3c \u0111\u1ed3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c ch\u1ec9 m\u1ee5c b\u1ecb thi\u1ebfu ho\u1eb7c c\u00e1c \u0111\u01b0\u1eddng n\u1ed1i k\u00e9m hi\u1ec7u qu\u1ea3 tr\u01b0\u1edbc khi tri\u1ec3n khai s\u1ea3n xu\u1ea5t.<\/li>\n<\/ul>\n

                  B\u1ea3o tr\u00ec li\u00ean t\u1ee5c \ud83d\udd04<\/h2>\n

                  M\u1ed9t s\u01a1 \u0111\u1ed3 ERD \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c kh\u00f4ng ph\u1ea3i l\u00e0 th\u00e0nh t\u1ef1u m\u1ed9t l\u1ea7n. N\u00f3 \u0111\u00f2i h\u1ecfi s\u1ef1 theo d\u00f5i li\u00ean t\u1ee5c khi nhu c\u1ea7u kinh doanh thay \u0111\u1ed5i.<\/p>\n

                    \n
                  • V\u00f2ng ki\u1ec3m tra:<\/strong> L\u00ean l\u1ecbch ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 l\u01b0\u1ee3c \u0111\u1ed3 v\u1edbi c\u00e1c b\u00ean li\u00ean quan. C\u00e1c quy t\u1eafc kinh doanh thay \u0111\u1ed5i, v\u00e0 m\u00f4 h\u00ecnh d\u1eef li\u1ec7u ph\u1ea3i th\u00edch nghi.<\/li>\n
                  • H\u1ebft h\u1ea1n s\u1eed d\u1ee5ng:<\/strong> \u0110\u00e1nh d\u1ea5u c\u00e1c b\u1ea3ng ho\u1eb7c c\u1ed9t kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u1ec3 lo\u1ea1i b\u1ecf tr\u01b0\u1edbc khi x\u00f3a. \u0110i\u1ec1u n\u00e0y ng\u0103n ch\u1eb7n c\u00e1c thay \u0111\u1ed5i g\u00e2y gi\u00e1n \u0111o\u1ea1n cho c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ee5 thu\u1ed9c.<\/li>\n
                  • V\u00f2ng ph\u1ea3n h\u1ed3i:<\/strong> Thu th\u1eadp ph\u1ea3n h\u1ed3i t\u1eeb c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n s\u1eed d\u1ee5ng API ho\u1eb7c l\u1edbp \u1ee9ng d\u1ee5ng. H\u1ecd th\u01b0\u1eddng ph\u00e1t hi\u1ec7n ra nh\u1eefng kho\u1ea3ng tr\u1ed1ng logic kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y trong s\u01a1 \u0111\u1ed3.<\/li>\n
                  • Nh\u1eadt k\u00fd ki\u1ec3m to\u00e1n:<\/strong> B\u1eadt ki\u1ec3m to\u00e1n tr\u00ean c\u00e1c b\u1ea3ng nh\u1ea1y c\u1ea3m. Theo d\u00f5i ai \u0111\u00e3 s\u1eeda \u0111\u1ed5i d\u1eef li\u1ec7u v\u00e0 v\u00e0o l\u00fac n\u00e0o.<\/li>\n<\/ul>\n

                    Ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt v\u00e0 tu\u00e2n th\u1ee7 \ud83d\udee1\ufe0f<\/h2>\n

                    T\u00f9y thu\u1ed9c v\u00e0o ng\u00e0nh c\u1ee7a b\u1ea1n, c\u00e1c ti\u00eau chu\u1ea9n tu\u00e2n th\u1ee7 c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 quy \u0111\u1ecbnh c\u00e1ch c\u1ea5u tr\u00fac s\u01a1 \u0111\u1ed3 ERD.<\/p>\n

                      \n
                    • B\u1ea3o m\u1eadt d\u1eef li\u1ec7u:<\/strong> \u0110\u1ea3m b\u1ea3o Th\u00f4ng tin nh\u1eadn d\u1ea1ng c\u00e1 nh\u00e2n (PII) \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u00fang c\u00e1ch. S\u1eed d\u1ee5ng c\u00e1c chi\u1ebfn l\u01b0\u1ee3c m\u00e3 h\u00f3a ho\u1eb7c t\u1ea1o m\u00e3 thay th\u1ebf khi c\u1ea7n thi\u1ebft.<\/li>\n
                    • Ch\u00ednh s\u00e1ch l\u01b0u tr\u1eef:<\/strong> Thi\u1ebft k\u1ebf c\u00e1c b\u1ea3ng \u0111\u1ec3 h\u1ed7 tr\u1ee3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u v\u00e0 l\u01b0u tr\u1eef l\u00e2u d\u00e0i. Bao g\u1ed3m c\u00e1c c\u1ed9t cho ng\u00e0y l\u01b0u tr\u1eef.<\/li>\n
                    • D\u1ea5u v\u1ebft ki\u1ec3m to\u00e1n:<\/strong> \u0110\u1ea3m b\u1ea3o m\u1ecdi b\u1ea3ng giao d\u1ecbch \u0111\u1ec1u c\u00f3 c\u01a1 ch\u1ebf theo d\u00f5i thay \u0111\u1ed5i (v\u00ed d\u1ee5 nh\u01b0\u0111\u00e3 c\u1eadp nh\u1eadt b\u1edfi<\/code>, \u0111\u00e3 c\u1eadp nh\u1eadt l\u00fac<\/code>).<\/li>\n
                    • Chi\u1ebfn l\u01b0\u1ee3c sao l\u01b0u:<\/strong> Thi\u1ebft k\u1ebf l\u01b0\u1ee3c \u0111\u1ed3 n\u00ean h\u1ed7 tr\u1ee3 ph\u1ee5c h\u1ed3i theo th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3. Tr\u00e1nh c\u00e1c thi\u1ebft k\u1ebf khi\u1ebfn vi\u1ec7c ch\u1ee5p \u1ea3nh m\u00e0n h\u00ecnh tr\u1edf n\u00ean kh\u00f4ng th\u1ec3.<\/li>\n<\/ul>\n

                      Suy ngh\u0129 cu\u1ed1i c\u00f9ng v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n \ud83c\udfaf<\/h2>\n

                      Vi\u1ec7c x\u00e1c minh m\u1ed9t s\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 l\u00e0 m\u1ed9t l\u0129nh v\u1ef1c k\u1ebft h\u1ee3p s\u1ef1 ch\u00ednh x\u00e1c k\u1ef9 thu\u1eadt v\u1edbi hi\u1ec3u bi\u1ebft v\u1ec1 kinh doanh. N\u00f3 \u0111\u00f2i h\u1ecfi s\u1ef1 ki\u00ean nh\u1eabn, c\u1ea9n tr\u1ecdng v\u00e0 tinh th\u1ea7n s\u1eb5n s\u00e0ng \u0111\u1eb7t c\u00e2u h\u1ecfi cho c\u00e1c gi\u1ea3 \u0111\u1ecbnh. B\u1eb1ng c\u00e1ch tu\u00e2n theo danh s\u00e1ch ki\u1ec3m tra n\u00e0y, c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng d\u1eef li\u1ec7u n\u1ec1n t\u1ea3ng l\u00e0 v\u1eefng ch\u1eafc, \u0111\u00e1ng tin c\u1eady v\u00e0 s\u1eb5n s\u00e0ng \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n

                      T\u00ednh to\u00e0n v\u1eb9n c\u1ee7a m\u00f4 h\u00ecnh d\u1eef li\u1ec7u quy\u1ebft \u0111\u1ecbnh t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a ch\u00ednh d\u1eef li\u1ec7u. Khi b\u1ea3n v\u1ebd thi\u1ebft k\u1ebf b\u1ecb l\u1ed7i, c\u00f4ng tr\u00ecnh s\u1ebd kh\u00f4ng an to\u00e0n. H\u00e3y d\u00e0nh th\u1eddi gian x\u00e1c minh m\u1ecdi m\u1ed1i quan h\u1ec7, m\u1ecdi kh\u00f3a v\u00e0 m\u1ecdi r\u00e0ng bu\u1ed9c. \u0110\u1ea7u t\u01b0 ban \u0111\u1ea7u n\u00e0y ng\u0103n ng\u1eeba n\u1ee3 k\u1ef9 thu\u1eadt \u0111\u00e1ng k\u1ec3 v\u00e0 nh\u1eefng r\u1eafc r\u1ed1i v\u1eadn h\u00e0nh trong t\u01b0\u01a1ng lai. M\u1ed9t s\u01a1 \u0111\u1ed3 ERD \u0111\u01b0\u1ee3c x\u00e1c minh t\u1ed1t l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean h\u01b0\u1edbng t\u1edbi m\u1ed9t h\u1ec7 sinh th\u00e1i d\u1eef li\u1ec7u b\u1ec1n b\u1ec9.<\/p>\n

                      H\u00e3y nh\u1edb r\u1eb1ng c\u00f4ng c\u1ee5 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3, nh\u01b0ng ph\u00e1n \u0111o\u00e1n c\u1ee7a con ng\u01b0\u1eddi l\u00e0 kh\u00f4ng th\u1ec3 thay th\u1ebf. Lu\u00f4n \u00e1p d\u1ee5ng t\u01b0 duy ph\u1ea3n bi\u1ec7n v\u00e0o m\u00f4 h\u00ecnh. X\u00e1c minh r\u1eb1ng logic v\u1eabn h\u1ee3p l\u00fd trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p bi\u00ean. \u0110\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf h\u1ed7 tr\u1ee3 s\u1ef1 ph\u00e1t tri\u1ec3n trong t\u01b0\u01a1ng lai m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i x\u00e2y d\u1ef1ng l\u1ea1i ho\u00e0n to\u00e0n. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n v\u00e0 s\u1ef1 \u1ed5n \u0111\u1ecbnh cho h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n","protected":false},"excerpt":{"rendered":"

                      Thi\u1ebft k\u1ebf m\u1ed9t l\u01b0\u1ee3c \u0111\u1ed3 c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd l\u00e0 n\u1ec1n t\u1ea3ng cho \u0111\u1ed9 tin c\u1eady c\u1ee7a b\u1ea5t k\u1ef3 h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m n\u00e0o. S\u01a1 \u0111\u1ed3 quan h\u1ec7…<\/p>\n","protected":false},"author":1,"featured_media":1640,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"Danh s\u00e1ch ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n ERD cho c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u \ud83d\udee0\ufe0f","_yoast_wpseo_metadesc":"\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a l\u01b0\u1ee3c \u0111\u1ed3 v\u1edbi h\u01b0\u1edbng d\u1eabn x\u00e1c minh ERD to\u00e0n di\u1ec7n n\u00e0y. Bao g\u1ed3m c\u00e1c kh\u00f3a, chu\u1ea9n h\u00f3a v\u00e0 r\u00e0ng bu\u1ed9c m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng c\u1ee5 c\u1ee5 th\u1ec3 n\u00e0o.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[68],"tags":[89,92],"class_list":["post-1639","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database-design","tag-academic","tag-erd"],"yoast_head":"\nDanh s\u00e1ch ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n ERD cho c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u \ud83d\udee0\ufe0f<\/title>\n<meta name=\"description\" content=\"\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a l\u01b0\u1ee3c \u0111\u1ed3 v\u1edbi h\u01b0\u1edbng d\u1eabn x\u00e1c minh ERD to\u00e0n di\u1ec7n n\u00e0y. Bao g\u1ed3m c\u00e1c kh\u00f3a, chu\u1ea9n h\u00f3a v\u00e0 r\u00e0ng bu\u1ed9c m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o c\u00f4ng c\u1ee5 c\u1ee5 th\u1ec3 n\u00e0o.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.viz-note.com\/vi\/erd-integrity-validation-checklist-dba\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Danh s\u00e1ch ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n ERD cho c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean c\u01a1 s\u1edf d\u1eef li\u1ec7u \ud83d\udee0\ufe0f\" \/>\n<meta property=\"og:description\" content=\"\u0110\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a l\u01b0\u1ee3c \u0111\u1ed3 v\u1edbi h\u01b0\u1edbng d\u1eabn x\u00e1c minh ERD to\u00e0n di\u1ec7n n\u00e0y. 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