{"id":10706,"date":"2026-03-05T14:16:20","date_gmt":"2026-03-05T06:16:20","guid":{"rendered":"https:\/\/www.archimetric.com\/vn\/understanding-uml-multiplicity\/"},"modified":"2026-03-05T14:16:20","modified_gmt":"2026-03-05T06:16:20","slug":"understanding-uml-multiplicity","status":"publish","type":"post","link":"https:\/\/www.archimetric.com\/vn\/understanding-uml-multiplicity\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 \u0110a d\u1ea1ng UML"},"content":{"rendered":"<p>Trong l\u0129nh v\u1ef1c thi\u1ebft k\u1ebf v\u00e0 m\u00f4 h\u00ecnh h\u00f3a ph\u1ea7n m\u1ec1m, Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t (UML) \u0111\u00f3ng vai tr\u00f2 l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 tr\u1ef1c quan h\u00f3a v\u00e0 t\u00e0i li\u1ec7u h\u00f3a c\u1ea5u tr\u00fac v\u00e0 h\u00e0nh vi c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng. M\u1ed9t trong nh\u1eefng kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong UML l\u00e0<a href=\"https:\/\/blog.visual-paradigm.com\/what-is-multiplicity\/\"><strong>\u0111a d\u1ea1ng<\/strong><\/a>, \u0111\u1ecbnh ngh\u0129a c\u00e1c r\u00e0ng bu\u1ed9c v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 tham gia v\u00e0o m\u1ed9t m\u1ed1i quan h\u1ec7. B\u00e0i vi\u1ebft n\u00e0y \u0111i s\u00e2u v\u00e0o kh\u00e1i ni\u1ec7m \u0111a d\u1ea1ng, \u00fd ngh\u0129a c\u1ee7a n\u00f3 v\u00e0 c\u00e1ch n\u00f3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c s\u01a1 \u0111\u1ed3 UML.<\/p>\n<h4>\u0110a d\u1ea1ng l\u00e0 g\u00ec?<\/h4>\n<p><a href=\"https:\/\/blog.visual-paradigm.com\/what-is-multiplicity\/\">\u0110a d\u1ea1ng trong UML<\/a> l\u00e0 m\u1ed9t r\u00e0ng bu\u1ed9c x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 tham gia v\u00e0o m\u1ed9t \u0111\u1ea7u c\u1ee7a m\u1ed1i quan h\u1ec7. N\u00f3 tr\u1ea3 l\u1eddi c\u00e1c c\u00e2u h\u1ecfi nh\u01b0 \u201cM\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 s\u1edf h\u1eefu bao nhi\u00eau xe \u00f4 t\u00f4?\u201d hay \u201cC\u00f3 bao nhi\u00eau ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111i\u1ec1u khi\u1ec3n m\u1ed9t chi\u1ebfc xe nh\u1ea5t \u0111\u1ecbnh?\u201d B\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh \u0111a d\u1ea1ng, b\u1ea1n thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc v\u1ec1 c\u00e1ch c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng trong m\u1ed7i l\u1edbp c\u00f3 th\u1ec3 li\u00ean k\u1ebft v\u1edbi nhau, cung c\u1ea5p m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng v\u00e0 s\u00fac t\u00edch \u0111\u1ec3 bi\u1ec3u di\u1ec5n c\u00e1c m\u1ed1i quan h\u1ec7 n\u00e0y.<\/p>\n<h4>Bi\u1ec3u di\u1ec5n \u0111a d\u1ea1ng<\/h4>\n<p>\u0110a d\u1ea1ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t kho\u1ea3ng x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u0111a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng \u0111\u01b0\u1ee3c ph\u00e9p tham gia v\u00e0o m\u1ed9t m\u1ed1i quan h\u1ec7. \u0110\u1ecbnh d\u1ea1ng \u0111\u1ec3 bi\u1ec3u di\u1ec5n \u0111a d\u1ea1ng l\u00e0:<\/p>\n<ul>\n<li><strong>S\u1ed1 l\u01b0\u1ee3ng ch\u00ednh x\u00e1c<\/strong>: M\u1ed9t con s\u1ed1 duy nh\u1ea5t ch\u1ec9 ra s\u1ed1 l\u01b0\u1ee3ng ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<li><strong>Kho\u1ea3ng<\/strong>: M\u1ed9t c\u1eb7p s\u1ed1 \u0111\u01b0\u1ee3c ph\u00e2n c\u00e1ch b\u1edfi hai d\u1ea5u ch\u1ea5m (..) ch\u1ec9 ra s\u1ed1 l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u0111a.<\/li>\n<li><strong>D\u1ea5u sao (*)<\/strong>: Ch\u1ec9 ra s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng gi\u1edbi h\u1ea1n.<\/li>\n<\/ul>\n<p>V\u00ed d\u1ee5:<\/p>\n<ul>\n<li><code class=\"\">1<\/code>: Ch\u00ednh x\u00e1c m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<li><code class=\"\">0..1<\/code>: Kh\u00f4ng ho\u1eb7c m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<li><code class=\"\">1..*<\/code>: \u00cdt nh\u1ea5t m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng, kh\u00f4ng gi\u1edbi h\u1ea1n tr\u00ean.<\/li>\n<li><code class=\"\">*<\/code>: B\u1ea5t k\u1ef3 s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng n\u00e0o, k\u1ec3 c\u1ea3 kh\u00f4ng.<\/li>\n<\/ul>\n<p><img alt=\"What is Multiplicity\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2024\/12\/05-multiplicities-examples.png\"\/><\/p>\n<h4>\u00c1p d\u1ee5ng \u0111a d\u1ea1ng trong c\u00e1c m\u1ed1i quan h\u1ec7<\/h4>\n<p>Khi m\u00f4 h\u00ecnh h\u00f3a c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c l\u1edbp, \u0111a d\u1ea1ng \u0111\u01b0\u1ee3c g\u00e1n cho m\u1ed7i \u0111\u1ea7u c\u1ee7a m\u1ed1i quan h\u1ec7. V\u00ed d\u1ee5, h\u00e3y xem x\u00e9t m\u1ed1i quan h\u1ec7 gi\u1eefa l\u1edbp<code class=\"\">Ng\u01b0\u1eddi<\/code> l\u1edbp v\u00e0 l\u1edbp<code class=\"\">Xe<\/code> l\u1edbp:<\/p>\n<ul>\n<li><strong>C\u00e2u h\u1ecfi 1<\/strong>: M\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 s\u1edf h\u1eefu bao nhi\u00eau xe h\u01a1i?<\/li>\n<li><strong>C\u00e2u h\u1ecfi 2<\/strong>: C\u00f3 bao nhi\u00eau ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111i\u1ec1u khi\u1ec3n m\u1ed9t chi\u1ebfc xe nh\u1ea5t \u0111\u1ecbnh?<\/li>\n<\/ul>\n<p>C\u00e1c c\u00e2u tr\u1ea3 l\u1eddi cho nh\u1eefng c\u00e2u h\u1ecfi n\u00e0y \u0111\u01b0\u1ee3c \u0111\u1eb7t b\u00ean c\u1ea1nh c\u00e1c l\u1edbp t\u01b0\u01a1ng \u1ee9ng trong m\u1ed1i quan h\u1ec7. N\u1ebfu m\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 s\u1edf h\u1eefu t\u1eeb kh\u00f4ng \u0111\u1ebfn nhi\u1ec1u xe h\u01a1i, \u0111\u1ed9 nhi\u1ec1u g\u1ea7n l\u1edbp<code class=\"\">xe h\u01a1i<\/code>s\u1ebd l\u00e0<code class=\"\">0..*<\/code>. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu m\u1ed9t chi\u1ebfc xe c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi m\u1ed9t \u0111\u1ebfn nhi\u1ec1u ng\u01b0\u1eddi, \u0111\u1ed9 nhi\u1ec1u g\u1ea7n l\u1edbp<code class=\"\">ng\u01b0\u1eddi<\/code>s\u1ebd l\u00e0<code class=\"\">1..*<\/code>.<\/p>\n<h4>V\u00ed d\u1ee5: L\u00f4 h\u00e0ng v\u00e0 S\u1ea3n ph\u1ea9m<\/h4>\n<p>\u0110\u1ec3 minh h\u1ecda, h\u00e3y xem x\u00e9t m\u1ed9t t\u00ecnh hu\u1ed1ng trong \u0111\u00f3 m\u1ed9t<code class=\"\">l\u00f4 h\u00e0ng<\/code>ph\u1ea3i ch\u1ee9a \u00edt nh\u1ea5t m\u1ed9t<code class=\"\">s\u1ea3n ph\u1ea9m<\/code>nh\u01b0ng c\u00f3 th\u1ec3 ch\u1ee9a bao nhi\u00eau s\u1ea3n ph\u1ea9m t\u00f9y \u00fd. \u0110\u1ed9 nhi\u1ec1u cho \u0111\u1ea7u<code class=\"\">s\u1ea3n ph\u1ea9m<\/code>c\u1ee7a m\u1ed1i quan h\u1ec7 s\u1ebd l\u00e0<code class=\"\">1..*<\/code>, cho th\u1ea5y r\u1eb1ng m\u1ed9t l\u00f4 h\u00e0ng ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t s\u1ea3n ph\u1ea9m nh\u01b0ng c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u.<\/p>\n<h4>K\u00fd hi\u1ec7u v\u00e0 bi\u1ec3u t\u01b0\u1ee3ng<\/h4>\n<p>Trong s\u01a1 \u0111\u1ed3 UML, \u0111\u1ed9 nhi\u1ec1u \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng c\u00e1c k\u00fd hi\u1ec7u c\u1ee5 th\u1ec3:<\/p>\n<ul>\n<li><strong>D\u1ea5u sao (*)<\/strong>: \u0110\u1ea1i di\u1ec7n cho m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00f4ng gi\u1edbi h\u1ea1n.<\/li>\n<li><strong>Kho\u1ea3ng (<code class=\"\">min..max<\/code>)<\/strong>: X\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u0111a c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<li><strong>S\u1ed1 l\u01b0\u1ee3ng ch\u00ednh x\u00e1c<\/strong>: Ch\u1ec9 ra s\u1ed1 l\u01b0\u1ee3ng ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng.<\/li>\n<\/ul>\n<p>C\u00e1c k\u00fd hi\u1ec7u n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng c\u00e1c r\u00e0ng bu\u1ed9c v\u00e0 quy t\u1eafc \u0111i\u1ec1u ch\u1ec9nh m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c l\u1edbp.<\/p>\n<h3>V\u00ed d\u1ee5 1: Ng\u01b0\u1eddi v\u00e0 Xe h\u01a1i<\/h3>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, m\u1ed9t <code class=\"\">Ng\u01b0\u1eddi<\/code> c\u00f3 th\u1ec3 s\u1edf h\u1eefu t\u1eeb kh\u00f4ng \u0111\u1ebfn nhi\u1ec1u <code class=\"\">Xe h\u01a1i<\/code>, v\u00e0 m\u1ed9t <code class=\"\">Xe h\u01a1i<\/code> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi t\u1eeb m\u1ed9t \u0111\u1ebfn nhi\u1ec1u <code class=\"\">Ng\u01b0\u1eddi<\/code>.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2024\/12\/img_67652d8a9b1e6.png\"\/><\/p>\n<h3>V\u00ed d\u1ee5 2: L\u00f4 h\u00e0ng v\u00e0 S\u1ea3n ph\u1ea9m<\/h3>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, m\u1ed9t <code class=\"\">L\u00f4 h\u00e0ng<\/code> ph\u1ea3i ch\u1ee9a \u00edt nh\u1ea5t m\u1ed9t <code class=\"\">S\u1ea3n ph\u1ea9m<\/code> nh\u01b0ng c\u00f3 th\u1ec3 ch\u1ee9a s\u1ed1 l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m c\u1ea7n thi\u1ebft.<\/p>\n<p><img alt=\"SoWkIImgAStDuULApaaiBbO8piWio4tDAr6evkLIKD1EpiyhISpCAmueoayfJIufrj2qKl39B2wnWGhOyNBLydB1D4C5eNepyv9pIbDIKpppO8OYjCD4OFhXrYePwkbfAIdewi9OC3Ej561kKG1gSaZDIm6x6W00 (321\u00d7218)\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2024\/12\/img_67652d8b3ea92.png\"\/><\/p>\n<h3>V\u00ed d\u1ee5 3: Th\u01b0 vi\u1ec7n v\u00e0 S\u00e1ch<\/h3>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, m\u1ed9t <code class=\"\">Th\u01b0 vi\u1ec7n<\/code> c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u <code class=\"\">S\u00e1ch<\/code>, v\u00e0 m\u1ed9t <code class=\"\">S\u00e1ch<\/code> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong m\u1ed9t <code class=\"\">Th\u01b0 vi\u1ec7n<\/code>.<\/p>\n<p><img alt=\"SoWkIImgAStDuULApaaiBbRmoKmgIYogLAZcvL9GqCv8B7RApyykrj2q0ieKbzY0U7QyNBMyN30D816ewhJyqhmKppoe4H0zO2PK0yni9KCb1LrT1IK3FJqj9OW1LWh9-NabYPbvnGf0unrIyrB0RW80 (210\u00d7218)\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2024\/12\/img_67652d8be004c.png\"\/><\/p>\n<h3>V\u00ed d\u1ee5 4: Gi\u00e1o vi\u00ean v\u00e0 h\u1ecdc sinh<\/h3>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, m\u1ed9t <code class=\"\">gi\u00e1o vi\u00ean<\/code> c\u00f3 th\u1ec3 gi\u1ea3ng d\u1ea1y nhi\u1ec1u <code class=\"\">h\u1ecdc sinh<\/code>, v\u00e0 m\u1ed9t <code class=\"\">h\u1ecdc sinh<\/code> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3ng d\u1ea1y b\u1edfi m\u1ed9t <code class=\"\">gi\u00e1o vi\u00ean<\/code>.<\/p>\n<p><img alt=\"SoWkIImgAStDuULApaaiBbO8IKrCpaWjKgZcvL9Gq2u1yug3IqfJKlDAYZKqhHHyCejBRA02ThnSjRnSCArGGPZMnDBqZ1AdIgY18ArG9bGJp2ObGoK5NLq59GCzFIqbk25M2b2x5O2MEAJcfO3T2000 (279\u00d7218)\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2024\/12\/img_67652d8c80d65.png\"\/><\/p>\n<h3>V\u00ed d\u1ee5 5: \u0110\u01a1n h\u00e0ng v\u00e0 m\u1eb7t h\u00e0ng<\/h3>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, m\u1ed9t <code class=\"\">\u0111\u01a1n h\u00e0ng<\/code> c\u00f3 th\u1ec3 ch\u1ee9a m\u1ed9t ho\u1eb7c nhi\u1ec1u <code class=\"\">m\u1eb7t h\u00e0ng<\/code>, v\u00e0 m\u1ed9t <code class=\"\">m\u1eb7t h\u00e0ng<\/code> c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a kh\u00f4ng ho\u1eb7c nhi\u1ec1u <code class=\"\">\u0111\u01a1n h\u00e0ng<\/code>.<\/p>\n<p><img alt=\"SoWkIImgAStDuULApaaiBbRmBqf9BLAevkLIKD1EpiyhISpCA_OiISqjrj2qKl39B2wn0V7iUBbgURbWUa0YK2q5GDFyqy2687I0kJ0j40kK3FNqj9GKT7KLb0p0BB0PLWemAnM0oXrIyrB0BWC0 (239\u00d7218)\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2024\/12\/img_67652d8d1e04f.png\"\/><\/p>\n<h3>V\u00ed d\u1ee5 6: C\u00f4ng ty v\u00e0 nh\u00e2n vi\u00ean<\/h3>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, m\u1ed9t <code class=\"\">c\u00f4ng ty<\/code> c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u <code class=\"\">nh\u00e2n vi\u00ean<\/code>, v\u00e0 m\u1ed9t <code class=\"\">nh\u00e2n vi\u00ean<\/code> l\u00e0m vi\u1ec7c cho m\u1ed9t <code class=\"\">c\u00f4ng ty<\/code>.<\/p>\n<p><img alt=\"SoWkIImgAStDuULApaaiBbPmpiyjICohLAZcvL9GqCv8B7RDBSZ9hqnDBTRGj5BmoImkiO69sF5orV9omJJ2HA4wo_EBielTyekWve4qGvbGNJ2Bb0oL57Hr5PGCzFIqb12cM2caWfd52a1h75BpKi1k1000 (277\u00d7218)\" decoding=\"async\" src=\"https:\/\/www.archimetric.com\/wp-content\/uploads\/2024\/12\/img_67652d8db7999.png\"\/><\/p>\n<p>C\u00e1c v\u00ed d\u1ee5 n\u00e0y minh h\u1ecda c\u00e1ch multiplicity \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng tham gia v\u00e0o m\u1ed9t m\u1ed1i quan h\u1ec7, cung c\u1ea5p m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng v\u00e0 s\u00fac t\u00edch \u0111\u1ec3 bi\u1ec3u di\u1ec5n c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa<a href=\"https:\/\/online.visual-paradigm.com\/diagrams\/tutorials\/class-diagram-tutorial\/\">c\u00e1c l\u1edbp trong UML<\/a>s\u01a1 \u0111\u1ed3.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Multiplicity l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n trong UML, cung c\u1ea5p m\u1ed9t c\u00e1ch c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ed1i t\u01b0\u1ee3ng tham gia v\u00e0o m\u1ed9t m\u1ed1i quan h\u1ec7. B\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh multiplicity, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c l\u1edbp \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng v\u00e0 d\u1ec5 hi\u1ec3u, d\u1eabn \u0111\u1ebfn c\u00e1c thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng b\u1ec1n v\u1eefng v\u00e0 d\u1ec5 b\u1ea3o tr\u00ec h\u01a1n. D\u00f9 b\u1ea1n \u0111ang m\u00f4 h\u00ecnh h\u00f3a c\u00e1c m\u1ed1i quan h\u1ec7 \u0111\u01a1n gi\u1ea3n hay c\u00e1c m\u1ed1i quan h\u1ec7 ph\u1ee9c t\u1ea1p, vi\u1ec7c hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng multiplicity l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho vi\u1ec7c m\u00f4 h\u00ecnh h\u00f3a UML hi\u1ec7u qu\u1ea3.<\/p>\n<h2>T\u00e0i nguy\u00ean<\/h2>\n<ol>\n<li><strong>V\u1ebd s\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 trong Visual Paradigm<\/strong>\n<ul>\n<li>Visual Paradigm. (n.d.).\u00a0<a href=\"https:\/\/www.visual-paradigm.com\/support\/documents\/vpuserguide\/3563\/3564\/85375_drawingentit.html\">V\u1ebd s\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 trong Visual Paradigm<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/www.visual-paradigm.com\/support\/documents\/vpuserguide\/3563\/3564\/85375_drawingentit.html\" rel=\"noopener\" target=\"_blank\">4<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 \u2013 Multiplicities<\/strong>\n<ul>\n<li>Stack Overflow. (n.d.).\u00a0<a href=\"https:\/\/stackoverflow.com\/questions\/41731377\/entity-relationship-diagram-multiplicities\">S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 \u2013 Multiplicities<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/stackoverflow.com\/questions\/41731377\/entity-relationship-diagram-multiplicities\" rel=\"noopener\" target=\"_blank\">5<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3<\/strong>\n<ul>\n<li>GitHub. (n.d.).\u00a0<a href=\"https:\/\/github.com\/weston-bailey\/entity-relationship-diagrams\">S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/github.com\/weston-bailey\/entity-relationship-diagrams\" rel=\"noopener\" target=\"_blank\">6<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>X\u00e1c \u0111\u1ecbnh multiplicity tr\u00ean m\u1ed9t h\u00ecnh d\u1ea1ng UML<\/strong>\n<ul>\n<li>H\u1ed7 tr\u1ee3 Microsoft. (n.d.).\u00a0<a href=\"https:\/\/support.microsoft.com\/en-us\/office\/specify-multiplicity-on-an-uml-shape-e2dcac55-e9b6-40fa-a976-eb5f6ef2df3b\">X\u00e1c \u0111\u1ecbnh multiplicity tr\u00ean m\u1ed9t h\u00ecnh d\u1ea1ng UML<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/support.microsoft.com\/en-us\/office\/specify-multiplicity-on-an-uml-shape-e2dcac55-e9b6-40fa-a976-eb5f6ef2df3b\" rel=\"noopener\" target=\"_blank\">7<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 (ERD) l\u00e0 g\u00ec?<\/strong>\n<ul>\n<li>Visual Paradigm. (n.d.).\u00a0<a href=\"https:\/\/www.visual-paradigm.com\/guide\/data-modeling\/what-is-entity-relationship-diagram\/\">S\u01a1 \u0111\u1ed3 quan h\u1ec7 th\u1ef1c th\u1ec3 (ERD) l\u00e0 g\u00ec?<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/www.visual-paradigm.com\/guide\/data-modeling\/what-is-entity-relationship-diagram\/\" rel=\"noopener\" target=\"_blank\">8<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Th\u00eam b\u1ea3ng v\u00e0o s\u01a1 \u0111\u1ed3 ER c\u1ee7a Visual Paradigm<\/strong>\n<ul>\n<li>Stack Overflow. (n.d.).\u00a0<a href=\"https:\/\/stackoverflow.com\/questions\/36464950\/visual-paradigm-er-diagram-adding-tables\">Th\u00eam b\u1ea3ng v\u00e0o s\u01a1 \u0111\u1ed3 ER c\u1ee7a Visual Paradigm<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/stackoverflow.com\/questions\/36464950\/visual-paradigm-er-diagram-adding-tables\" rel=\"noopener\" target=\"_blank\">9<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 th\u00eam m\u1ed9t t\u00ednh \u0111a d\u1ea1ng v\u00e0o s\u01a1 \u0111\u1ed3 l\u1edbp trong Visual Paradigm?<\/strong>\n<ul>\n<li>TheNewsIndependent. (2020, ng\u00e0y 29 th\u00e1ng 12).\u00a0<a href=\"https:\/\/www.thenewsindependent.com\/how-do-you-add-a-multiplicity-to-a-class-diagram-in-visual-paradigm\/\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 th\u00eam m\u1ed9t t\u00ednh \u0111a d\u1ea1ng v\u00e0o s\u01a1 \u0111\u1ed3 l\u1edbp trong Visual Paradigm?<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/www.thenewsindependent.com\/how-do-you-add-a-multiplicity-to-a-class-diagram-in-visual-paradigm\/\" rel=\"noopener\" target=\"_blank\">10<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Gi\u00e1o tr\u00ecnh d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u v\u1ec1 s\u01a1 \u0111\u1ed3 Entiti-Relationship (ER)<\/strong>\n<ul>\n<li>Blog c\u1ee7a Visual Paradigm. (2023, ng\u00e0y 21 th\u00e1ng 9).\u00a0<a href=\"https:\/\/blog.visual-paradigm.com\/beginners-guide-to-entity-relationship-er-diagrams\/\">Gi\u00e1o tr\u00ecnh d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u v\u1ec1 s\u01a1 \u0111\u1ed3 Entiti-Relationship (ER)<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/blog.visual-paradigm.com\/beginners-guide-to-entity-relationship-er-diagrams\/\" rel=\"noopener\" target=\"_blank\">11<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li><strong>T\u00ednh \u0111a d\u1ea1ng so v\u1edbi t\u00ednh cardinality<\/strong>\n<ul>\n<li>Stack Overflow. (n.d.).\u00a0<a href=\"https:\/\/stackoverflow.com\/questions\/17877582\/multiplicity-vs-cardinality\">T\u00ednh \u0111a d\u1ea1ng so v\u1edbi t\u00ednh cardinality<\/a>\u00a0<a class=\"mi-ref cursor-pointer align-super text-muted-foreground fade-in hover:underline\" data-state=\"closed\" href=\"https:\/\/stackoverflow.com\/questions\/17877582\/multiplicity-vs-cardinality\" rel=\"noopener\" target=\"_blank\">12<\/a>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><\/h2>\n","protected":false},"excerpt":{"rendered":"<p>Trong l\u0129nh v\u1ef1c thi\u1ebft k\u1ebf v\u00e0 m\u00f4 h\u00ecnh h\u00f3a ph\u1ea7n m\u1ec1m, Ng\u00f4n ng\u1eef m\u00f4 h\u00ecnh h\u00f3a th\u1ed1ng nh\u1ea5t (UML) \u0111\u00f3ng<\/p>\n","protected":false},"author":3479,"featured_media":10707,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"","fifu_image_url":"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/05-multiplicities-examples.png","fifu_image_alt":"","footnotes":""},"categories":[127],"tags":[],"class_list":["post-10706","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 v27.0 - 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