{"id":1777,"date":"2026-03-24T23:51:18","date_gmt":"2026-03-24T23:51:18","guid":{"rendered":"https:\/\/www.go-diagram.com\/tw\/entities-attributes-relationships-erd-guide\/"},"modified":"2026-03-24T23:51:18","modified_gmt":"2026-03-24T23:51:18","slug":"entities-attributes-relationships-erd-guide","status":"publish","type":"post","link":"https:\/\/www.go-diagram.com\/tw\/entities-attributes-relationships-erd-guide\/","title":{"rendered":"ERD\u6307\u5357\uff1a\u5be6\u9ad4\u3001\u5c6c\u6027\u3001\u95dc\u4fc2\uff1a\u6bcf\u4f4d\u958b\u767c\u4eba\u54e1\u90fd\u61c9\u4e86\u89e3\u7684\u6838\u5fc3\u6982\u5ff5"},"content":{"rendered":"<p>\u8cc7\u6599\u5eab\u8a2d\u8a08\u662f\u4efb\u4f55\u7a69\u5065\u8edf\u9ad4\u61c9\u7528\u7684\u9aa8\u5e79\u3002\u5728\u5efa\u69cb\u8655\u7406\u8907\u96dc\u8cc7\u6599\u7684\u7cfb\u7d71\u6642\uff0c\u53ef\u64f4\u5c55\u67b6\u69cb\u8207\u8106\u5f31\u6df7\u4e82\u4e4b\u9593\u7684\u5dee\u7570\uff0c\u5f80\u5f80\u53d6\u6c7a\u65bc\u4f60\u5982\u4f55\u7d44\u7e54\u8cc7\u8a0a\u3002\u5728\u9019\u7d50\u69cb\u7684\u6838\u5fc3\uff0c\u5b58\u5728\u4e09\u500b\u57fa\u672c\u652f\u67f1\uff1a\u5be6\u9ad4\u3001\u5c6c\u6027\u8207\u95dc\u4fc2\u3002\u7406\u89e3\u9019\u4e9b\u6982\u5ff5\u5c0d\u958b\u767c\u4eba\u54e1\u800c\u8a00\u4e26\u975e\u53ef\u6709\u53ef\u7121\uff0c\u800c\u662f\u5275\u9020\u53ef\u7dad\u8b77\u3001\u9ad8\u6548\u4e14\u908f\u8f2f\u6e05\u6670\u7684\u8cc7\u6599\u6a21\u578b\u6240\u4e0d\u53ef\u6216\u7f3a\u7684\u3002<\/p>\n<p>\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u662f\u9019\u4e9b\u7d50\u69cb\u7684\u85cd\u5716\u3002\u5b83\u80fd\u76f4\u89c0\u5448\u73fe\u8cc7\u6599\u5982\u4f55\u9023\u7d50\u3001\u5132\u5b58\uff0c\u4ee5\u53ca\u5728\u7cfb\u7d71\u4e2d\u5982\u4f55\u6d41\u52d5\u3002\u82e5\u672a\u80fd\u6e05\u695a\u638c\u63e1\u9019\u4e9b\u6838\u5fc3\u5143\u4ef6\uff0c\u5373\u4f7f\u6700\u5148\u9032\u7684\u61c9\u7528\u908f\u8f2f\u4e5f\u5c07\u96e3\u4ee5\u9806\u5229\u904b\u4f5c\u3002\u672c\u6307\u5357\u7cbe\u78ba\u5256\u6790\u6bcf\u4e00\u9805\u5143\u7d20\uff0c\u78ba\u4fdd\u4f60\u80fd\u5920\u81ea\u4fe1\u4e14\u6e05\u6670\u5730\u8a2d\u8a08\u8cc7\u6599\u6a21\u578b\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Hand-drawn whiteboard infographic illustrating core database design concepts: Entities (strong, weak, associative types with uniqueness\/consistency\/relevance criteria), Attributes (primary\/foreign keys, simple\/composite\/multivalued\/derived types with best practices), Relationships (1:1, 1:N, M:N cardinality with crow's foot notation, total\/partial participation), Normalization steps (1NF, 2NF, 3NF), common pitfalls (over\/under-normalization, data type errors, missing indexes), and scalability considerations. Color-coded sections with blue for entities, green for attributes, orange for relationships, purple for normalization. Features doodle-style icons, marker-style text, arrows, and visual hierarchy optimized for developers learning ERD fundamentals.\" decoding=\"async\" src=\"https:\/\/www.go-diagram.com\/wp-content\/uploads\/2026\/03\/entities-attributes-relationships-database-design-whiteboard-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\u7406\u89e3\u5be6\u9ad4\uff1a\u8cc7\u6599\u7684\u57fa\u790e \ud83e\uddf1<\/h2>\n<p>\u5728\u8cc7\u6599\u5eab\u8a2d\u8a08\u7684\u8108\u7d61\u4e2d\uff0c\u5be6\u9ad4\u4ee3\u8868\u4e00\u500b\u9700\u8981\u5132\u5b58\u8cc7\u8a0a\u7684\u7368\u7acb\u7269\u4ef6\u6216\u6982\u5ff5\u3002\u5b83\u662f\u8cc7\u6599\u6a21\u578b\u4e2d\u7684\u540d\u8a5e\u3002\u53ef\u5c07\u5176\u8996\u70ba\u73fe\u5be6\u4e16\u754c\u6216\u4f60\u696d\u52d9\u9818\u57df\u4e2d\u5b58\u5728\u7684\u4e00\u985e\u4e8b\u7269\u7684\u5206\u985e\u6216\u985e\u5225\u3002\u6bcf\u500b\u5be6\u9ad4\u5728\u7cfb\u7d71\u7684\u8108\u7d61\u4e2d\u90fd\u5fc5\u9808\u662f\u7368\u7279\u4e14\u53ef\u8b58\u5225\u7684\u3002<\/p>\n<h3>\u5be6\u9ad4\u7684\u985e\u578b<\/h3>\n<p>\u4e26\u975e\u6240\u6709\u5be6\u9ad4\u90fd\u662f\u4e00\u6a23\u7684\u3002\u8fa8\u8b58\u4f60\u6240\u8655\u7406\u7684\u5be6\u9ad4\u985e\u578b\uff0c\u6709\u52a9\u65bc\u5b9a\u7fa9\u8cc7\u6599\u5132\u5b58\u8207\u53d6\u5f97\u7684\u898f\u5247\u3002<\/p>\n<ul>\n<li><strong>\u5f37\u5be6\u9ad4\uff1a<\/strong> \u9019\u4e9b\u5be6\u9ad4\u7368\u7acb\u5b58\u5728\u3002\u5b83\u5011\u64c1\u6709\u81ea\u5df1\u7684\u4e3b\u9375\uff0c\u4e14\u4e0d\u4f9d\u8cf4\u5176\u4ed6\u5be6\u9ad4\u800c\u5b58\u5728\u3002\u4f8b\u5982\uff0c\u4e00\u500b<em>\u9867\u5ba2<\/em> \u6216\u4e00\u500b<em>\u7522\u54c1<\/em> \u53ef\u4ee5\u7368\u7acb\u5b58\u5728\u3002<\/li>\n<li><strong>\u5f31\u5be6\u9ad4\uff1a<\/strong> \u9019\u4e9b\u5be6\u9ad4\u7684\u5b58\u5728\u4f9d\u8cf4\u65bc\u5f37\u5be6\u9ad4\u3002\u82e5\u7121\u7236\u5be6\u9ad4\uff0c\u5b83\u5011\u7121\u6cd5\u88ab\u552f\u4e00\u8b58\u5225\u3002\u4e00\u500b\u7d93\u5178\u7bc4\u4f8b\u662f\u8a02\u55ae\u4e2d\u7684<em>\u8a02\u55ae\u9805\u76ee<\/em>\uff0c\u82e5\u7121\u8a02\u55ae\u7684\u4e0a\u4e0b\u6587\uff0c\u6b64\u9805\u76ee\u5728\u6b64\u7279\u5b9a\u7d50\u69cb\u4e2d\u5c07\u7121\u610f\u7fa9\u3002<em>\u8a02\u55ae<\/em>\u3002\u82e5\u7121\u8a02\u55ae\u7684\u4e0a\u4e0b\u6587\uff0c\u6b64\u9805\u76ee\u5728\u6b64\u7279\u5b9a\u7d50\u69cb\u4e2d\u5c07\u7121\u610f\u7fa9\u3002<\/li>\n<li><strong>\u95dc\u806f\u5be6\u9ad4\uff1a<\/strong> \u4e5f\u7a31\u70ba\u9023\u7d50\u8868\uff0c\u7528\u4ee5\u89e3\u6c7a\u591a\u5c0d\u591a\u7684\u95dc\u4fc2\u3002\u5b83\u5011\u9023\u7d50\u5169\u500b\u5176\u4ed6\u5be6\u9ad4\uff0c\u4ee5\u5141\u8a31\u5b83\u5011\u4e4b\u9593\u5b58\u5728\u591a\u91cd\u9023\u63a5\u3002<\/li>\n<\/ul>\n<h3>\u8fa8\u8b58\u5be6\u9ad4<\/h3>\n<p>\u5728\u8a2d\u8a08\u6a21\u578b\u6642\uff0c\u4f60\u5fc5\u9808\u554f\u81ea\u5df1\u54ea\u4e9b\u73fe\u5be6\u4e16\u754c\u7684\u7269\u4ef6\u9700\u8981\u88ab\u8ffd\u8e64\u3002\u5728\u4f60\u7684\u696d\u52d9\u9700\u6c42\u4e2d\u5c0b\u627e\u540d\u8a5e\u3002\u82e5\u696d\u52d9\u898f\u5247\u898f\u5b9a\u4f60\u9700\u8981\u8ffd\u8e64\u67d0\u4e8b\u7269\u7684\u72c0\u614b\u3001\u6b77\u53f2\u6216\u5c6c\u6027\uff0c\u90a3\u9ebc\u8a72\u4e8b\u7269\u5f88\u53ef\u80fd\u5c31\u662f\u4e00\u500b\u5be6\u9ad4\u3002<\/p>\n<p>\u8acb\u8003\u616e\u4ee5\u4e0b\u5b9a\u7fa9\u6709\u6548\u5be6\u9ad4\u7684\u7279\u5fb5\uff1a<\/p>\n<ul>\n<li><strong>\u7368\u7279\u6027\uff1a<\/strong> \u6bcf\u500b\u5be6\u4f8b\u90fd\u5fc5\u9808\u80fd\u8207\u5176\u4ed6\u6240\u6709\u5be6\u4f8b\u5340\u5206\u958b\u4f86\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027\uff1a<\/strong> \u5be6\u9ad4\u7684\u5b9a\u7fa9\u61c9\u5728\u6574\u500b\u7cfb\u7d71\u4e2d\u4fdd\u6301\u4e00\u81f4\u3002<\/li>\n<li><strong>\u76f8\u95dc\u6027\uff1a<\/strong> \u5be6\u9ad4\u61c9\u5728\u696d\u52d9\u908f\u8f2f\u4e2d\u5177\u6709\u5be6\u969b\u7528\u9014\u3002\u907f\u514d\u70ba\u90a3\u4e9b\u5f88\u5c11\u88ab\u67e5\u8a62\u6216\u4f7f\u7528\u7684\u8cc7\u6599\u5efa\u7acb\u5be6\u9ad4\u3002<\/li>\n<\/ul>\n<h2>\u5c6c\u6027\uff1a\u5b9a\u7fa9\u5be6\u9ad4\u5c6c\u6027 \ud83d\udd11<\/h2>\n<p>\u4e00\u65e6\u4f60\u78ba\u8a8d\u4e86\u5be6\u9ad4\uff0c\u5c31\u9700\u8981\u63cf\u8ff0\u5b83\u5011\u3002\u5c6c\u6027\u662f\u63cf\u8ff0\u5be6\u9ad4\u7684\u7279\u5fb5\u3001\u5c6c\u6027\u6216\u7d30\u7bc0\u3002\u5982\u679c\u5be6\u9ad4\u662f\u4e00\u5f35\u8868\u683c\uff0c\u5c6c\u6027\u5c31\u662f\u4e00\u6b04\u3002\u5b83\u5011\u5171\u540c\u69cb\u6210\u4e86\u4f60\u6240\u7ba1\u7406\u7684\u8cc7\u6599\u7684\u5b8c\u6574\u5716\u50cf\u3002<\/p>\n<h3>\u4e3b\u9375\u8207\u5916\u9375<\/h3>\n<p>\u4e26\u975e\u6240\u6709\u5c6c\u6027\u90fd\u5177\u6709\u540c\u7b49\u91cd\u8981\u6027\u3002\u6709\u4e9b\u5c6c\u6027\u5728\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u8207\u9023\u7d50\u4e2d\u626e\u6f14\u95dc\u9375\u89d2\u8272\u3002<\/p>\n<ul>\n<li><strong>\u4e3b\u9375 (PK)\uff1a<\/strong> \u5be6\u9ad4\u5167\u8a18\u9304\u7684\u552f\u4e00\u8b58\u5225\u7b26\u3002\u78ba\u4fdd\u6c92\u6709\u5169\u884c\u8cc7\u6599\u5b8c\u5168\u76f8\u540c\u3002\u4e3b\u9375\u53ef\u4ee5\u662f\u55ae\u4e00\u6b04\u4f4d\uff08\u4f8b\u5982\u8b58\u5225\u78bc\uff09\uff0c\u4e5f\u53ef\u4ee5\u662f\u7531\u591a\u500b\u6b04\u4f4d\u7d44\u6210\u7684\u8907\u5408\u9375\u3002<\/li>\n<li><strong>\u5916\u9375 (FK)\uff1a<\/strong> \u9023\u7d50\u5230\u53e6\u4e00\u5be6\u9ad4\u4e3b\u9375\u7684\u5c6c\u6027\u3002\u9019\u5efa\u7acb\u4e86\u8868\u683c\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u5b83\u5f37\u5236\u57f7\u884c\u53c3\u8003\u5b8c\u6574\u6027\uff0c\u78ba\u4fdd\u4e00\u5f35\u8868\u683c\u4e2d\u7684\u8a18\u9304\u7121\u6cd5\u5f15\u7528\u53e6\u4e00\u5f35\u8868\u683c\u4e2d\u4e0d\u5b58\u5728\u7684\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h3>\u5c6c\u6027\u5206\u985e<\/h3>\n<p>\u5c6c\u6027\u6839\u64da\u5176\u5132\u5b58\u8207\u63a8\u5c0e\u65b9\u5f0f\u6709\u6240\u4e0d\u540c\u3002\u7406\u89e3\u9019\u4e9b\u5dee\u7570\u6709\u52a9\u65bc\u512a\u5316\u5132\u5b58\u7a7a\u9593\u8207\u67e5\u8a62\u6548\u80fd\u3002<\/p>\n<table border=\"1\" style=\"width:100%; border-collapse: collapse; text-align: left;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px;\">\u985e\u578b<\/th>\n<th style=\"padding: 8px;\">\u63cf\u8ff0<\/th>\n<th style=\"padding: 8px;\">\u7bc4\u4f8b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">\u7c21\u55ae<\/td>\n<td style=\"padding: 8px;\">\u7121\u6cd5\u518d\u9032\u4e00\u6b65\u5206\u5272\u3002\u5177\u6709\u539f\u5b50\u6027\u3002<\/td>\n<td style=\"padding: 8px;\">\u96fb\u8a71\u865f\u78bc<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">\u8907\u5408<\/td>\n<td style=\"padding: 8px;\">\u53ef\u518d\u7d30\u5206\u70ba\u5b50\u90e8\u5206\u3002<\/td>\n<td style=\"padding: 8px;\">\u5730\u5740\uff08\u8857\u9053\u3001\u57ce\u5e02\u3001\u90f5\u905e\u5340\u865f\uff09<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">\u591a\u503c<\/td>\n<td style=\"padding: 8px;\">\u53ef\u70ba\u55ae\u4e00\u5be6\u9ad4\u5be6\u4f8b\u5132\u5b58\u591a\u500b\u503c\u3002<\/td>\n<td style=\"padding: 8px;\">\u96fb\u5b50\u90f5\u4ef6\u5730\u5740<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">\u884d\u751f<\/td>\n<td style=\"padding: 8px;\">\u7531\u5176\u4ed6\u5c6c\u6027\u8a08\u7b97\u800c\u5f97\u3002<\/td>\n<td style=\"padding: 8px;\">\u5e74\u9f61\uff08\u7531\u51fa\u751f\u65e5\u671f\u63a8\u5c0e\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u5c6c\u6027\u7684\u6700\u4f73\u5be6\u52d9<\/h3>\n<p>\u5b9a\u7fa9\u5c6c\u6027\u6642\uff0c\u8acb\u8a18\u4f4f\u4ee5\u4e0b\u6307\u5c0e\u539f\u5247\uff0c\u4ee5\u78ba\u4fdd\u8cc7\u6599\u54c1\u8cea\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u63cf\u8ff0\u6027\u540d\u7a31\uff1a<\/strong> \u907f\u514d\u4f7f\u7528\u50cf\u9019\u6a23\u7684\u901a\u7528\u540d\u7a31<code>col1<\/code> \u6216 <code>\u8cc7\u6599<\/code>\u3002\u4f7f\u7528\u80fd\u8aaa\u660e\u5167\u5bb9\u7684\u540d\u7a31\uff0c\u4f8b\u5982 <code>\u5ba2\u6236\u90f5\u4ef6<\/code> \u6216 <code>\u8a02\u55ae\u65e5\u671f<\/code>.<\/li>\n<li><strong>\u5b9a\u7fa9\u8cc7\u6599\u985e\u578b\uff1a<\/strong> \u8981\u7cbe\u78ba\u3002\u8a08\u6578\u4f7f\u7528\u6574\u6578\uff0c\u6642\u9593\u76f8\u95dc\u8cc7\u6599\u4f7f\u7528\u65e5\u671f\uff0c\u6587\u5b57\u4f7f\u7528\u5b57\u4e32\u3002\u9019\u53ef\u907f\u514d\u8cc7\u6599\u8f38\u5165\u8207\u53d6\u5f97\u6642\u767c\u751f\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6700\u5c0f\u5316\u7a7a\u503c\uff1a<\/strong> \u5728\u53ef\u80fd\u7684\u60c5\u6cc1\u4e0b\uff0c\u5f37\u5236\u57f7\u884c\u7d04\u675f\uff0c\u4ee5\u78ba\u4fdd\u5c6c\u6027\u4e0d\u6703\u7559\u7a7a\u3002\u7a7a\u503c\u53ef\u80fd\u4f7f\u67e5\u8a62\u8b8a\u5f97\u8907\u96dc\uff0c\u4e26\u5c0e\u81f4\u610f\u5916\u7d50\u679c\u3002<\/li>\n<li><strong>\u8cc7\u6599\u6b63\u898f\u5316\uff1a<\/strong> \u78ba\u4fdd\u5c6c\u6027\u50c5\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002\u907f\u514d\u5132\u5b58\u53ef\u63a8\u5c0e\u6216\u79fb\u81f3\u5176\u4ed6\u5be6\u9ad4\u7684\u8cc7\u6599\u3002<\/li>\n<\/ul>\n<h2>\u95dc\u4fc2\uff1a\u9023\u7d50\u5404\u500b\u9ede \ud83d\udd17<\/h2>\n<p> \u5be6\u9ad4\u5f88\u5c11\u5b64\u7acb\u5b58\u5728\u3002\u95dc\u4fc2\u5b9a\u7fa9\u4e86\u5be6\u9ad4\u4e4b\u9593\u5982\u4f55\u4e92\u52d5\u3002\u5b83\u6c7a\u5b9a\u4e86\u8cc7\u6599\u5982\u4f55\u9023\u7d50\u3001\u67e5\u8a62\u5982\u4f55\u7d50\u5408\uff0c\u4ee5\u53ca\u8cc7\u6599\u5eab\u4e2d\u5982\u4f55\u7dad\u6301\u5b8c\u6574\u6027\u3002\u8a2d\u8a08\u826f\u597d\u7684\u95dc\u4fc2\u7d50\u69cb\u53ef\u9632\u6b62\u8cc7\u6599\u91cd\u8907\uff0c\u4e26\u78ba\u4fdd\u66f4\u65b0\u6b63\u78ba\u50b3\u64ad\u3002<\/p>\n<h3>\u57fa\u6578<\/h3>\n<p>\u57fa\u6578\u5b9a\u7fa9\u4e86\u5be6\u9ad4\u4e4b\u9593\u7684\u6578\u503c\u95dc\u4fc2\u3002\u5b83\u56de\u7b54\u4e86\u9019\u500b\u554f\u984c\uff1a\u300c\u5be6\u9ad4 A \u7684\u591a\u5c11\u500b\u5be6\u4f8b\u8207\u5be6\u9ad4 B \u7684\u591a\u5c11\u500b\u5be6\u4f8b\u76f8\u95dc\uff1f\u300d<\/p>\n<ul>\n<li><strong>\u4e00\u5c0d\u4e00 (1:1)\uff1a<\/strong> \u5be6\u9ad4 A \u7684\u4e00\u500b\u5be6\u4f8b\u50c5\u8207\u5be6\u9ad4 B \u7684\u4e00\u500b\u5be6\u4f8b\u76f8\u95dc\u3002\u9019\u8f03\u70ba\u7f55\u898b\uff0c\u4f46\u6703\u51fa\u73fe\u5728\u4f7f\u7528\u8005\u64c1\u6709\u4e00\u500b\u500b\u4eba\u6a94\u6848\u7b49\u60c5\u5883\u4e2d\u3002<\/li>\n<li><strong>\u4e00\u5c0d\u591a (1:N)\uff1a<\/strong> \u5be6\u9ad4 A \u7684\u4e00\u500b\u5be6\u4f8b\u8207\u5be6\u9ad4 B \u7684\u591a\u500b\u5be6\u4f8b\u76f8\u95dc\u3002\u4f8b\u5982\uff0c\u4e00\u500b <em>\u90e8\u9580<\/em> \u64c1\u6709\u8a31\u591a <em>\u54e1\u5de5<\/em>.<\/li>\n<li><strong>\u591a\u5c0d\u591a (M:N)\uff1a<\/strong> \u5be6\u9ad4 A \u7684\u591a\u500b\u5be6\u4f8b\u8207\u5be6\u9ad4 B \u7684\u591a\u500b\u5be6\u4f8b\u76f8\u95dc\u3002\u4f8b\u5982\uff0c\u4e00\u540d <em>\u5b78\u751f<\/em> \u53ef\u4ee5\u8a3b\u518a\u591a\u9580 <em>\u8ab2\u7a0b<\/em>\uff0c\u4ee5\u53ca\u4e00\u500b<em>\u8ab2\u7a0b<\/em>\u53ef\u4ee5\u6709\u8a31\u591a<em>\u5b78\u751f<\/em>.<\/li>\n<\/ul>\n<h3>\u53c3\u8207\u7d04\u675f<\/h3>\n<p>\u57fa\u6578\u544a\u8a34\u4f60\u6578\u91cf\uff0c\u4f46\u53c3\u8207\u7d04\u675f\u544a\u8a34\u4f60\u95dc\u4fc2\u662f\u5426\u70ba\u5f37\u5236\u6027\u7684\u3002<\/p>\n<ul>\n<li><strong>\u5b8c\u5168\u53c3\u8207\uff1a<\/strong>\u5be6\u9ad4\u7684\u6bcf\u500b\u5be6\u4f8b\u90fd\u5fc5\u9808\u53c3\u8207\u6b64\u95dc\u4fc2\u3002\u4f8b\u5982\uff0c\u6bcf\u500b<em>\u8a02\u55ae<\/em>\u90fd\u5fc5\u9808\u6709\u4e00\u500b<em>\u5ba2\u6236<\/em>.<\/li>\n<li><strong>\u90e8\u5206\u53c3\u8207\uff1a<\/strong>\u5be6\u4f8b\u53ef\u80fd\u53c3\u8207\uff0c\u4e5f\u53ef\u80fd\u4e0d\u53c3\u8207\u6b64\u95dc\u4fc2\u3002\u4f8b\u5982\uff0c\u4e00\u500b<em>\u5ba2\u6236<\/em>\u53ef\u80fd\u6709\uff0c\u4e5f\u53ef\u80fd\u6c92\u6709<em>\u8a02\u55ae<\/em>\u5728\u67d0\u4e00\u6642\u523b\u3002<\/li>\n<\/ul>\n<h3>\u5be6\u4f5c\u7b56\u7565<\/h3>\n<p>\u4e0d\u540c\u7684\u57fa\u6578\u9700\u8981\u5728\u8cc7\u6599\u6a21\u578b\u4e2d\u63a1\u7528\u4e0d\u540c\u7684\u5be6\u4f5c\u7b56\u7565\u3002<\/p>\n<table border=\"1\" style=\"width:100%; border-collapse: collapse; text-align: left;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"padding: 8px;\">\u95dc\u4fc2\u985e\u578b<\/th>\n<th style=\"padding: 8px;\">\u5be6\u4f5c\u65b9\u6cd5<\/th>\n<th style=\"padding: 8px;\">\u7bc4\u4f8b\u60c5\u5883<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">1:1<\/td>\n<td style=\"padding: 8px;\">\u5408\u4f75\u8868\u683c\uff0c\u6216\u5728\u5176\u4e2d\u4e00\u5074\u65b0\u589e\u5916\u9375\u3002<\/td>\n<td style=\"padding: 8px;\">\u4f7f\u7528\u8005\u500b\u4eba\u6a94\u6848\u9023\u7d50\u81f3\u4f7f\u7528\u8005\u5e33\u6236\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">1:N<\/td>\n<td style=\"padding: 8px;\">\u5728\u300c\u591a\u300d\u7684\u4e00\u65b9\u8868\u683c\u4e2d\u65b0\u589e\u5916\u9375\u3002<\/td>\n<td style=\"padding: 8px;\">\u54e1\u5de5\u8868\u683c\u5305\u542b\u90e8\u9580\u7de8\u865f\uff08Dept_ID\uff09\u3002<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">M:N<\/td>\n<td style=\"padding: 8px;\">\u5efa\u7acb\u4e00\u500b\u5305\u542b\u5169\u500b\u5916\u9375\u7684\u806f\u7d50\u8868\u3002<\/td>\n<td style=\"padding: 8px;\">\u9023\u7d50\u5b78\u751f\u8207\u8ab2\u7a0b\u7684\u8a3b\u518a\u8868\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u8cc7\u6599\u5eab\u898f\u7bc4\u5316\uff1a\u70ba\u7a69\u5b9a\u6027\u800c\u8a2d\u8a08\u7d50\u69cb \ud83d\udcd0<\/h2>\n<p>\u96d6\u7136\u5be6\u9ad4\u3001\u5c6c\u6027\u548c\u95dc\u4fc2\u69cb\u6210\u4e86\u7d50\u69cb\uff0c\u4f46\u898f\u7bc4\u5316\u5247\u5c0d\u8a72\u7d50\u69cb\u9032\u884c\u7d44\u7e54\uff0c\u4ee5\u6e1b\u5c11\u5197\u9918\u4e26\u63d0\u5347\u5b8c\u6574\u6027\u3002\u898f\u7bc4\u5316\u662f\u4e00\u7cfb\u5217\u6b65\u9a5f\uff0c\u65e8\u5728\u78ba\u4fdd\u8cc7\u6599\u4f9d\u8cf4\u95dc\u4fc2\u5177\u6709\u908f\u8f2f\u6027\u3002<\/p>\n<h3>\u7b2c\u4e00\u7bc4\u5f0f\uff081NF\uff09<\/h3>\n<p>\u5728 1NF \u4e2d\uff0c\u6bcf\u4e00\u6b04\u90fd\u5fc5\u9808\u5305\u542b\u539f\u5b50\u503c\u3002\u4e0d\u80fd\u5728\u55ae\u4e00\u55ae\u5143\u683c\u4e2d\u5132\u5b58\u4e00\u7d44\u503c\u3002\u6bcf\u4e00\u5217\u90fd\u5fc5\u9808\u662f\u552f\u4e00\u7684\uff0c\u901a\u5e38\u7531\u4e3b\u9375\u4f86\u5f37\u5236\u57f7\u884c\u3002\u9019\u53ef\u6d88\u9664\u91cd\u8907\u7fa4\u7d44\u3002<\/p>\n<h3>\u7b2c\u4e8c\u7bc4\u5f0f\uff082NF\uff09<\/h3>\n<p>\u4e00\u65e6\u9054\u6210 1NF\uff0c2NF \u78ba\u4fdd\u6240\u6709\u975e\u9375\u5c6c\u6027\u90fd\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002\u5982\u679c\u4f60\u4f7f\u7528\u8907\u5408\u9375\uff0c\u5247\u6bcf\u500b\u5c6c\u6027\u90fd\u5fc5\u9808\u4f9d\u8cf4\u6574\u500b\u9375\uff0c\u800c\u975e\u50c5\u50c5\u90e8\u5206\u9375\u3002<\/p>\n<h3>\u7b2c\u4e09\u7bc4\u5f0f\uff083NF\uff09<\/h3>\n<p>3NF \u6d88\u9664\u50b3\u905e\u4f9d\u8cf4\u3002\u975e\u9375\u5c6c\u6027\u4e0d\u61c9\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u9375\u5c6c\u6027\u3002\u4f8b\u5982\uff0c\u5982\u679c<em>\u57ce\u5e02<\/em>\u4f9d\u8cf4\u65bc<em>\u90f5\u905e\u5340\u865f<\/em>\uff0c\u4e14<em>\u90f5\u905e\u5340\u865f<\/em>\u4f9d\u8cf4\u65bc<em>\u5ba2\u6236\u7de8\u865f<\/em>\uff0c\u90a3\u9ebc<em>\u57ce\u5e02<\/em>\u4f9d\u8cf4\u65bc<em>\u5ba2\u6236\u7de8\u865f<\/em>\u50b3\u905e\u4f9d\u8cf4\u3002\u70ba\u89e3\u6c7a\u6b64\u554f\u984c\uff0c\u61c9\u5c07<em>\u57ce\u5e02<\/em>\u79fb\u81f3\u7368\u7acb\u7684\u5be6\u9ad4\uff0c\u6216\u78ba\u4fdd\u5176\u76f4\u63a5\u8207\u9375\u9023\u7d50\u3002<\/p>\n<h2>\u8a2d\u8a08\u4e2d\u7684\u5e38\u898b\u9677\u9631 \u26a0\ufe0f<\/h2>\n<p>\u5373\u4f7f\u7d93\u9a57\u8c50\u5bcc\u7684\u958b\u767c\u4eba\u54e1\u5728\u8a2d\u8a08\u8cc7\u6599\u6a21\u578b\u6642\u4e5f\u6703\u72af\u932f\u3002\u4e86\u89e3\u5e38\u898b\u9677\u9631\u53ef\u4ee5\u5728\u958b\u767c\u968e\u6bb5\u7bc0\u7701\u5927\u91cf\u6642\u9593\u3002<\/p>\n<ul>\n<li><strong>\u904e\u5ea6\u898f\u7bc4\u5316\uff1a<\/strong>\u5c07\u8cc7\u6599\u5206\u5272\u6210\u904e\u591a\u5c0f\u578b\u5be6\u9ad4\u6703\u4f7f\u67e5\u8a62\u8b8a\u5f97\u8907\u96dc\u4e14\u7de9\u6162\u3002\u6709\u6642\uff0c\u91dd\u5c0d\u8b80\u53d6\u5bc6\u96c6\u578b\u5de5\u4f5c\u8ca0\u8f09\uff0c\u5141\u8a31\u4e00\u5b9a\u7a0b\u5ea6\u7684\u975e\u898f\u7bc4\u5316\u3002<\/li>\n<li><strong>\u898f\u7bc4\u5316\u4e0d\u8db3\uff1a<\/strong> 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