{"id":10675,"date":"2025-01-10T14:48:15","date_gmt":"2025-01-10T06:48:15","guid":{"rendered":"https:\/\/www.cybermedian.com\/vn\/entity-relationship-diagrams-erds-a-comprehensive-guide\/"},"modified":"2026-04-14T19:07:54","modified_gmt":"2026-04-14T11:07:54","slug":"entity-relationship-diagrams-erds-a-comprehensive-guide","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/vn\/entity-relationship-diagrams-erds-a-comprehensive-guide\/","title":{"rendered":"S\u01a1 \u0111\u1ed3 Entiti-M\u1ed1i quan h\u1ec7 (ERD): H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p>S\u01a1 \u0111\u1ed3 Entiti-M\u1ed1i quan h\u1ec7 (<a href=\"https:\/\/www.visual-paradigm.com\/guide\/data-modeling\/what-is-entity-relationship-diagram\/\">ERD<\/a>) l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu trong thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt ph\u1ea7n m\u1ec1m. Ch\u00fang cung c\u1ea5p m\u1ed9t bi\u1ec3u di\u1ec5n tr\u1ef1c quan v\u1ec1 c\u1ea5u tr\u00fac d\u1eef li\u1ec7u v\u00e0 c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3 kh\u00e1c nhau trong m\u1ed9t h\u1ec7 th\u1ed1ng. B\u00e0i vi\u1ebft n\u00e0y nh\u1eb1m m\u1ee5c \u0111\u00edch tr\u1edf th\u00e0nh m\u1ed9t h\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n \u0111\u1ec3 hi\u1ec3u r\u00f5 ERD, kh\u00e1m ph\u00e1 c\u00e1c kh\u00e1i ni\u1ec7m ch\u00ednh v\u00e0 tr\u00ecnh b\u00e0y m\u1ed9t v\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u0111\u1ec3 minh h\u1ecda \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a ch\u00fang.<\/p>\n<h2>C\u00e1c kh\u00e1i ni\u1ec7m ch\u00ednh c\u1ee7a ERD<\/h2>\n<h3>C\u00e1c th\u1ef1c th\u1ec3<\/h3>\n<p>C\u00e1c th\u1ef1c th\u1ec3 l\u00e0 nh\u1eefng \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong c\u01a1 s\u1edf d\u1eef li\u1ec7u. Ch\u00fang \u0111\u1ea1i di\u1ec7n cho nh\u1eefng th\u1ef1c th\u1ec3 trong th\u1ebf gi\u1edbi th\u1ef1c, ch\u1eb3ng h\u1ea1n nh\u01b0 kh\u00e1ch h\u00e0ng, s\u1ea3n ph\u1ea9m ho\u1eb7c \u0111\u01a1n h\u00e0ng. M\u1ed7i th\u1ef1c th\u1ec3 c\u00f3 c\u00e1c thu\u1ed9c t\u00ednh m\u00f4 t\u1ea3 c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a n\u00f3. V\u00ed d\u1ee5, m\u1ed9t th\u1ef1c th\u1ec3 &#8220;Kh\u00e1ch h\u00e0ng&#8221; c\u00f3 th\u1ec3 c\u00f3 c\u00e1c thu\u1ed9c t\u00ednh nh\u01b0 &#8220;M\u00e3Kh\u00e1chH\u00e0ng&#8221;, &#8220;T\u00ean&#8221;, &#8220;H\u1ecd&#8221;, v\u00e0 &#8220;Email&#8221;.<\/p>\n<h3>C\u00e1c m\u1ed1i quan h\u1ec7<\/h3>\n<p>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. Ch\u00fang c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t-\u0111\u1ed1i-m\u1ed9t, m\u1ed9t-\u0111\u1ed1i-nhi\u1ec1u ho\u1eb7c nhi\u1ec1u-\u0111\u1ed1i-nhi\u1ec1u. V\u00ed d\u1ee5, m\u1ed9t th\u1ef1c th\u1ec3 &#8220;Kh\u00e1ch h\u00e0ng&#8221; c\u00f3 th\u1ec3 c\u00f3 m\u1ed1i quan h\u1ec7 m\u1ed9t-\u0111\u1ed1i-nhi\u1ec1u v\u1edbi th\u1ef1c th\u1ec3 &#8220;\u0110\u01a1n h\u00e0ng&#8221;, cho th\u1ea5y m\u1ed9t kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 \u0111\u1eb7t nhi\u1ec1u \u0111\u01a1n h\u00e0ng.<\/p>\n<h3>C\u00e1c thu\u1ed9c t\u00ednh<\/h3>\n<p>C\u00e1c thu\u1ed9c t\u00ednh l\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh ho\u1eb7c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a m\u1ed9t th\u1ef1c th\u1ec3. Ch\u00fang cung c\u1ea5p th\u00f4ng tin chi ti\u1ebft v\u1ec1 th\u1ef1c th\u1ec3. V\u00ed d\u1ee5, c\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a th\u1ef1c th\u1ec3 &#8220;Phim&#8221; c\u00f3 th\u1ec3 bao g\u1ed3m &#8220;Ti\u00eau \u0111\u1ec1&#8221;, &#8220;N\u0103mPh\u00e1tH\u00e0nh&#8221;, v\u00e0 &#8220;X\u1ebfpH\u1ea1ng&#8221;.<\/p>\n<h3>Kh\u00f3a ch\u00ednh<\/h3>\n<p>Kh\u00f3a ch\u00ednh l\u00e0 m\u1ed9t \u0111\u1ecbnh danh duy nh\u1ea5t cho m\u1ed9t th\u1ef1c th\u1ec3. N\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ed7i b\u1ea3n ghi trong th\u1ef1c th\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh duy nh\u1ea5t. V\u00ed d\u1ee5, &#8220;M\u00e3Kh\u00e1chH\u00e0ng&#8221; c\u00f3 th\u1ec3 l\u00e0 kh\u00f3a ch\u00ednh cho th\u1ef1c th\u1ec3 &#8220;Kh\u00e1ch h\u00e0ng&#8221;.<\/p>\n<h3>Kh\u00f3a ngo\u1ea1i<\/h3>\n<p>Kh\u00f3a ngo\u1ea1i l\u00e0 c\u00e1c thu\u1ed9c t\u00ednh trong m\u1ed9t th\u1ef1c th\u1ec3 tham chi\u1ebfu \u0111\u1ebfn kh\u00f3a ch\u00ednh c\u1ee7a m\u1ed9t th\u1ef1c th\u1ec3 kh\u00e1c. Ch\u00fang thi\u1ebft l\u1eadp v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c th\u1ef1c th\u1ec3. V\u00ed d\u1ee5, m\u1ed9t th\u1ef1c th\u1ec3 &#8220;\u0110\u01a1n h\u00e0ng&#8221; c\u00f3 th\u1ec3 c\u00f3 kh\u00f3a ngo\u1ea1i &#8220;M\u00e3Kh\u00e1chH\u00e0ng&#8221; tham chi\u1ebfu \u0111\u1ebfn th\u1ef1c th\u1ec3 &#8220;Kh\u00e1ch h\u00e0ng&#8221;.<\/p>\n<h2>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf: H\u1ec7 th\u1ed1ng cho thu\u00ea phim<\/h2>\n<p>\u0110\u1ec3 minh h\u1ecda \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n c\u1ee7a ERD, h\u00e3y c\u00f9ng xem x\u00e9t m\u1ed9t v\u00ed d\u1ee5 th\u1ef1c t\u1ebf v\u1ec1 h\u1ec7 th\u1ed1ng cho thu\u00ea phim. ERD cho h\u1ec7 th\u1ed1ng n\u00e0y \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n trong s\u01a1 \u0111\u1ed3 \u0111\u01b0\u1ee3c cung c\u1ea5p.<\/p>\n<p><img alt=\"Entity Relationship Diagram: Movie Rental System\" decoding=\"async\" src=\"https:\/\/online.visual-paradigm.com\/repository\/images\/8d0b0c2d-1963-4997-b95a-aca38976851a\/entity-relationship-diagram-design\/entity-relationship-diagram-movie-rental-system.png\"\/><\/p>\n<h3>C\u00e1c th\u1ef1c th\u1ec3 v\u00e0 thu\u1ed9c t\u00ednh<\/h3>\n<ol>\n<li><strong>Phim<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c b\u1ed9 phim c\u00f3 s\u1eb5n \u0111\u1ec3 cho thu\u00ea.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: M\u00e3Phim, Ti\u00eau\u0110\u1ec1, M\u00f4T\u1ea3, N\u0103mPh\u00e1tH\u00e0nh, Th\u1eddiGianThu\u00ea, Gi\u00e1Thu\u00ea, \u0110\u1ed9D\u00e0i, ChiPh\u00edThayTh\u1ebf, X\u1ebfpH\u1ea1ng, \u0110\u1eb7c\u0110i\u1ec3m\u0110\u1eb7cBi\u1ec7t, V\u0103nB\u1ea3nTo\u00e0nB\u1ed9<\/li>\n<\/ul>\n<\/li>\n<li><strong>Th\u1ec3 lo\u1ea1i<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c th\u1ec3 lo\u1ea1i ho\u1eb7c th\u1ec3 lo\u1ea1i c\u1ee7a phim.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: M\u00e3Th\u1ec3Lo\u1ea1i, T\u00ean<\/li>\n<\/ul>\n<\/li>\n<li><strong>Th\u1ec3 lo\u1ea1i Phim<\/strong>: \u0110\u1ea1i di\u1ec7n cho m\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111\u1ed1i-nhi\u1ec1u gi\u1eefa phim v\u00e0 th\u1ec3 lo\u1ea1i.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: M\u00e3Phim, M\u00e3Th\u1ec3Lo\u1ea1i<\/li>\n<\/ul>\n<\/li>\n<li><strong>Ng\u00f4n ng\u1eef<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c ng\u00f4n ng\u1eef m\u00e0 phim c\u00f3 s\u1eb5n.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: LanguageID, Name<\/li>\n<\/ul>\n<\/li>\n<li><strong>Di\u1ec5n vi\u00ean<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c di\u1ec5n vi\u00ean trong phim.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: ActorID, FirstName, LastName<\/li>\n<\/ul>\n<\/li>\n<li><strong>Di\u1ec5n vi\u00ean phim<\/strong>: \u0110\u1ea1i di\u1ec7n cho m\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111a gi\u1eefa phim v\u00e0 di\u1ec5n vi\u00ean.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: FilmID, ActorID<\/li>\n<\/ul>\n<\/li>\n<li><strong>Kho h\u00e0ng<\/strong>: \u0110\u1ea1i di\u1ec7n cho s\u1ed1 l\u01b0\u1ee3ng phim s\u1eb5n s\u00e0ng cho thu\u00ea.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: InventoryID, FilmID<\/li>\n<\/ul>\n<\/li>\n<li><strong>Thu\u00ea<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c giao d\u1ecbch thu\u00ea.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: RentalID, StaffID, CustomerID, InventoryID, RentalDate, ReturnDate<\/li>\n<\/ul>\n<\/li>\n<li><strong>Thanh to\u00e1n<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c kho\u1ea3n thanh to\u00e1n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n cho c\u00e1c giao d\u1ecbch thu\u00ea.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: PaymentID, RentalID, CustomerID, Amount, PaymentDate<\/li>\n<\/ul>\n<\/li>\n<li><strong>Kh\u00e1ch h\u00e0ng<\/strong>: \u0110\u1ea1i di\u1ec7n cho kh\u00e1ch h\u00e0ng c\u1ee7a h\u1ec7 th\u1ed1ng thu\u00ea.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: CustomerID, AddressID, FirstName, LastName, Email, Active, CreateDate<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u0110\u1ecba ch\u1ec9<\/strong>: \u0110\u1ea1i di\u1ec7n cho \u0111\u1ecba ch\u1ec9 c\u1ee7a kh\u00e1ch h\u00e0ng v\u00e0 nh\u00e2n vi\u00ean.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: AddressID, CityID, Address, Address2, District, PostalCode, Phone<\/li>\n<\/ul>\n<\/li>\n<li><strong>Th\u00e0nh ph\u1ed1<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c th\u00e0nh ph\u1ed1 n\u01a1i kh\u00e1ch h\u00e0ng v\u00e0 nh\u00e2n vi\u00ean sinh s\u1ed1ng.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: CityID, City, CountryID<\/li>\n<\/ul>\n<\/li>\n<li><strong>Qu\u1ed1c gia<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c qu\u1ed1c gia n\u01a1i kh\u00e1ch h\u00e0ng v\u00e0 nh\u00e2n vi\u00ean sinh s\u1ed1ng.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: CountryID, Country<\/li>\n<\/ul>\n<\/li>\n<li><strong>Nh\u00e2n vi\u00ean<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c th\u00e0nh vi\u00ean nh\u00e2n vi\u00ean c\u1ee7a h\u1ec7 th\u1ed1ng thu\u00ea.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: StaffID, AddressID, StoreID, FirstName, LastName, Email, Active, PictureURL<\/li>\n<\/ul>\n<\/li>\n<li><strong>C\u1eeda h\u00e0ng<\/strong>: \u0110\u1ea1i di\u1ec7n cho c\u00e1c c\u1eeda h\u00e0ng cho thu\u00ea.\n<ul>\n<li>Thu\u1ed9c t\u00ednh: StoreID, AddressID<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3>M\u1ed1i quan h\u1ec7<\/h3>\n<ul>\n<li><strong>Phim<\/strong>v\u00e0<strong>Th\u1ec3 lo\u1ea1i<\/strong>: M\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111a th\u00f4ng qua<strong>Th\u1ec3 lo\u1ea1i phim<\/strong>th\u1ef1c th\u1ec3.<\/li>\n<li><strong>Phim<\/strong>v\u00e0<strong>Di\u1ec5n vi\u00ean<\/strong>: M\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111a th\u00f4ng qua<strong>Di\u1ec5n vi\u00ean phim<\/strong>th\u1ef1c th\u1ec3.<\/li>\n<li><strong>Phim<\/strong>v\u00e0<strong>Kho h\u00e0ng<\/strong>: M\u1ed1i quan h\u1ec7 m\u1ed9t-\u0111a, trong \u0111\u00f3 m\u1ed9t phim c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u m\u1eb7t h\u00e0ng trong kho.<\/li>\n<li><strong>Kho h\u00e0ng<\/strong>v\u00e0<strong>Cho thu\u00ea<\/strong>: M\u1ed1i quan h\u1ec7 m\u1ed9t-\u0111a, trong \u0111\u00f3 m\u1ed9t m\u1eb7t h\u00e0ng kho c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thu\u00ea nhi\u1ec1u l\u1ea7n.<\/li>\n<li><strong>Cho thu\u00ea<\/strong>v\u00e0<strong>Thanh to\u00e1n<\/strong>: M\u1ed1i quan h\u1ec7 m\u1ed9t-m\u1ed9t, trong \u0111\u00f3 m\u1ed7i l\u1ea7n cho thu\u00ea c\u00f3 m\u1ed9t kho\u1ea3n thanh to\u00e1n.<\/li>\n<li><strong>Cho thu\u00ea<\/strong>\u00a0v\u00e0\u00a0<strong>Kh\u00e1ch h\u00e0ng<\/strong>: M\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111\u01a1n, trong \u0111\u00f3 nhi\u1ec1u l\u1ea7n thu\u00ea c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi m\u1ed9t kh\u00e1ch h\u00e0ng.<\/li>\n<li><strong>Kh\u00e1ch h\u00e0ng<\/strong>\u00a0v\u00e0\u00a0<strong>\u0110\u1ecba ch\u1ec9<\/strong>: M\u1ed1i quan h\u1ec7 m\u1ed9t-\u0111\u01a1n, trong \u0111\u00f3 m\u1ed7i kh\u00e1ch h\u00e0ng c\u00f3 m\u1ed9t \u0111\u1ecba ch\u1ec9.<\/li>\n<li><strong>\u0110\u1ecba ch\u1ec9<\/strong>\u00a0v\u00e0\u00a0<strong>Th\u00e0nh ph\u1ed1<\/strong>: M\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111\u01a1n, trong \u0111\u00f3 nhi\u1ec1u \u0111\u1ecba ch\u1ec9 c\u00f3 th\u1ec3 n\u1eb1m trong m\u1ed9t th\u00e0nh ph\u1ed1.<\/li>\n<li><strong>Th\u00e0nh ph\u1ed1<\/strong>\u00a0v\u00e0\u00a0<strong>Qu\u1ed1c gia<\/strong>: M\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111\u01a1n, trong \u0111\u00f3 nhi\u1ec1u th\u00e0nh ph\u1ed1 c\u00f3 th\u1ec3 n\u1eb1m trong m\u1ed9t qu\u1ed1c gia.<\/li>\n<li><strong>Nh\u00e2n vi\u00ean<\/strong>\u00a0v\u00e0\u00a0<strong>C\u1eeda h\u00e0ng<\/strong>: M\u1ed1i quan h\u1ec7 nhi\u1ec1u-\u0111\u01a1n, trong \u0111\u00f3 nhi\u1ec1u nh\u00e2n vi\u00ean c\u00f3 th\u1ec3 l\u00e0m vi\u1ec7c t\u1ea1i m\u1ed9t c\u1eeda h\u00e0ng.<\/li>\n<li><strong>C\u1eeda h\u00e0ng<\/strong>\u00a0v\u00e0\u00a0<strong>\u0110\u1ecba ch\u1ec9<\/strong>: M\u1ed1i quan h\u1ec7 m\u1ed9t-\u0111\u01a1n, trong \u0111\u00f3 m\u1ed7i c\u1eeda h\u00e0ng c\u00f3 m\u1ed9t \u0111\u1ecba ch\u1ec9.<\/li>\n<\/ul>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p><a href=\"https:\/\/www.visual-paradigm.com\/solution\/erd-diagram-tool\/\">S\u01a1 \u0111\u1ed3 Entiti-Quan h\u1ec7<\/a> (ERDs) l\u00e0 <a href=\"https:\/\/online.visual-paradigm.com\/diagrams\/solutions\/free-erd-tool\/\">c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd<\/a> \u0111\u1ec3 thi\u1ebft k\u1ebf v\u00e0 hi\u1ec3u c\u1ea5u tr\u00fac c\u01a1 s\u1edf d\u1eef li\u1ec7u. B\u1eb1ng c\u00e1ch bi\u1ec3u di\u1ec5n tr\u1ef1c quan c\u00e1c th\u1ef1c th\u1ec3, thu\u1ed9c t\u00ednh v\u00e0 m\u1ed1i quan h\u1ec7, ERDs gi\u00fap t\u1ea1o ra c\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c t\u1ed1t. Tr\u01b0\u1eddng h\u1ee3p nghi\u00ean c\u1ee9u v\u1ec1 h\u1ec7 th\u1ed1ng cho thu\u00ea phim minh h\u1ecda c\u00e1ch ERDs c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 m\u00f4 h\u00ecnh h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n v\u00e0 t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a d\u1eef li\u1ec7u. D\u00f9 b\u1ea1n l\u00e0 nh\u00e0 thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u, k\u1ef9 s\u01b0 ph\u1ea7n m\u1ec1m hay nh\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u, <a href=\"https:\/\/www.visual-paradigm.com\/tutorials\/how-to-model-relational-database-with-erd.jsp\">th\u00e0nh th\u1ea1o ERDs<\/a>l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gi\u1edbi thi\u1ec7u S\u01a1 \u0111\u1ed3 Entiti-M\u1ed1i quan h\u1ec7 (ERD) l\u00e0 nh\u1eefng c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu trong thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef<\/p>\n","protected":false},"author":1,"featured_media":10676,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-10675","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unified-modeling-language"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - 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