{"id":10163,"date":"2023-03-02T17:47:01","date_gmt":"2023-03-02T09:47:01","guid":{"rendered":"https:\/\/www.cybermedian.com\/cn\/10698-2\/"},"modified":"2026-04-20T09:11:35","modified_gmt":"2026-04-20T09:11:35","slug":"10698-2","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/cn\/10698-2\/","title":{"rendered":"\u5b66\u4e60\u5b9e\u4f53\u5173\u7cfb\u56fe\uff1a\u5168\u9762\u6307\u5357"},"content":{"rendered":"<h2>ER\u56fe\u7b80\u4ecb<\/h2>\n<p><img alt=\"What is Entity Relationship Diagram (ERD)?\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/02-er-diagram-depicts-business-entities-relationships.png\"\/><\/p>\n<p>\u5b9e\u4f53\u5173\u7cfb\uff08ER\uff09\u56fe\u63d0\u4f9b\u4e86\u4e00\u79cd\u5f3a\u5927\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u76f4\u89c2\u5730\u8868\u793a\u7cfb\u7edf\u7684\u6570\u636e\u9700\u6c42\u4ee5\u53ca\u4e0d\u540c\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\uff0c\u5b83\u4eec\u5c24\u5176\u6709\u7528\uff0c\u56e0\u4e3a\u7406\u89e3\u5404\u4e2a\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\u5bf9\u4e8e\u521b\u5efa\u9ad8\u6548\u4e14\u6709\u6548\u7684\u6570\u636e\u5e93\u7ed3\u6784\u81f3\u5173\u91cd\u8981\u3002ER\u56fe\u6709\u52a9\u4e8e\u8bc6\u522b\u4e0d\u540c\u7684\u5b9e\u4f53\u3001\u5b83\u4eec\u7684\u5c5e\u6027\u4ee5\u53ca\u5b83\u4eec\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u4ece\u800c\u5168\u9762\u5c55\u793a\u6570\u636e\u6a21\u578b\u3002<\/p>\n<p>ER\u56fe\u662f\u5f00\u53d1\u4eba\u5458\u3001\u8bbe\u8ba1\u5e08\u548c\u5229\u76ca\u76f8\u5173\u8005\u90fd\u5b9d\u8d35\u7684\u5de5\u5177\u3002\u5f00\u53d1\u4eba\u5458\u548c\u8bbe\u8ba1\u5e08\u53ef\u4ee5\u4f7f\u7528ER\u56fe\u6765\u7406\u89e3\u6570\u636e\u6a21\u578b\u7684\u9700\u6c42\uff0c\u5e76\u521b\u5efa\u65e2\u9ad8\u6548\u53c8\u6613\u4e8e\u7ef4\u62a4\u7684\u4f18\u5316\u6570\u636e\u5e93\u6a21\u5f0f\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5229\u76ca\u76f8\u5173\u8005\u53ef\u4ee5\u4f7f\u7528ER\u56fe\u6765\u53ef\u89c6\u5316\u7cfb\u7edf\u7684\u6570\u636e\u9700\u6c42\uff0c\u5e76\u5c31\u5982\u4f55\u6539\u8fdb\u5176\u8bbe\u8ba1\u63d0\u4f9b\u53cd\u9988\u3002<\/p>\n<p>\u603b\u4f53\u800c\u8a00\uff0cER\u56fe\u662f\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5404\u79cd\u884c\u4e1a\u548c\u5e94\u7528\u573a\u666f\u4e2d\u3002\u901a\u8fc7\u4f7f\u7528ER\u56fe\uff0c\u5f00\u53d1\u4eba\u5458\u3001\u8bbe\u8ba1\u5e08\u548c\u5229\u76ca\u76f8\u5173\u8005\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u6a21\u578b\u7684\u8bbe\u8ba1\u6ee1\u8db3\u7cfb\u7edf\u7684\u9700\u6c42\uff0c\u4ece\u800c\u6784\u5efa\u51fa\u65e2\u9ad8\u6548\u53c8\u6709\u6548\u7684\u6570\u636e\u5e93\u3002<\/p>\n<h2>ER\u56fe\u7684\u7ec4\u6210\u90e8\u5206<\/h2>\n<div class=\"flex-1 overflow-hidden\">\n<div class=\"react-scroll-to-bottom--css-ypbly-79elbk h-full dark:bg-gray-800\">\n<div class=\"react-scroll-to-bottom--css-ypbly-1n7m0yu\">\n<div class=\"flex flex-col items-center text-sm dark:bg-gray-800\">\n<div class=\"w-full border-b border-black\/10 dark:border-gray-900\/50 text-gray-800 dark:text-gray-100 group bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 m-auto md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap\">\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<p>ER\u56fe\u7531\u4e09\u4e2a\u4e3b\u8981\u7ec4\u6210\u90e8\u5206\u6784\u6210\uff1a\u5b9e\u4f53\u3001\u5c5e\u6027\u548c\u5173\u7cfb\u3002\u8fd9\u4e9b\u7ec4\u6210\u90e8\u5206\u7528\u4e8e\u521b\u5efa\u6570\u636e\u6a21\u578b\u4ee5\u53ca\u4e0d\u540c\u5b9e\u4f53\u4e4b\u95f4\u5173\u7cfb\u7684\u53ef\u89c6\u5316\u8868\u793a\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"w-full border-b border-black\/10 dark:border-gray-900\/50 text-gray-800 dark:text-gray-100 group bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 m-auto md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap\">\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<ul>\n<li><strong>\u5b9e\u4f53\uff1a<\/strong>\u5728\u6570\u636e\u6a21\u578b\u4e2d\u8868\u793a\u7684\u73b0\u5b9e\u4e16\u754c\u5bf9\u8c61\uff0c\u4f8b\u5982\u5ba2\u6237\u6216\u8ba2\u5355\uff0c\u5177\u6709\u552f\u4e00\u6807\u8bc6\u3002<\/li>\n<\/ul>\n<p><img alt=\"Entity Attributes\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/04-an-erd-entity-with-entities.png\"\/><\/p>\n<ul>\n<li><strong>\u5c5e\u6027\uff1a<\/strong>\u5b9e\u4f53\u7684\u7279\u5f81\uff0c\u4f8b\u5982\u59d3\u540d\u3001\u5730\u5740\u6216ID\uff0c\u63d0\u4f9b\u6709\u5173\u5b9e\u4f53\u7684\u989d\u5916\u4fe1\u606f\uff0c\u5e76\u5c06\u5176\u4e0e\u5176\u4ed6\u5b9e\u4f53\u533a\u5206\u5f00\u6765\u3002<\/li>\n<li><strong>\u5173\u7cfb\uff1a<\/strong>\u4e24\u4e2a\u6216\u591a\u4e2a\u5b9e\u4f53\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u63cf\u8ff0\u5b83\u4eec\u4e4b\u95f4\u7684\u76f8\u4e92\u5173\u7cfb\u3002<\/li>\n<li><strong>\u4e00\u5bf9\u4e00\u5173\u7cfb\uff1a<\/strong>\u4e00\u79cd\u5173\u7cfb\uff0c\u5176\u4e2d\u4e00\u4e2a\u5b9e\u4f53\u4e0e\u53e6\u4e00\u4e2a\u5b9e\u4f53\u5efa\u7acb\u4e00\u5bf9\u4e00\u5173\u7cfb\uff0c\u610f\u5473\u7740\u6bcf\u4e2a\u5b9e\u4f53\u4ec5\u4e0e\u53e6\u4e00\u4e2a\u5b9e\u4f53\u76f8\u5173\u8054\u3002<\/li>\n<\/ul>\n<p><img alt=\"One-to-One cardinality example\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/07-erd-one-to-one-relationship-example.png\"\/> <img alt=\"One-to-Many cardinality example\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/08-erd-one-to-many-example.png\"\/><\/p>\n<ul>\n<li><strong>\u4e00\u5bf9\u591a\u5173\u7cfb\uff1a<\/strong>\u4e00\u79cd\u5173\u7cfb\uff0c\u5176\u4e2d\u4e00\u4e2a\u5b9e\u4f53\u4e0e\u591a\u4e2a\u5b9e\u4f53\u76f8\u5173\u8054\uff0c\u800c\u6bcf\u4e2a\u76f8\u5173\u8054\u7684\u5b9e\u4f53\u4ec5\u4e0e\u4e00\u4e2a\u5b9e\u4f53\u76f8\u5173\u8054\u3002<\/li>\n<li><strong>\u591a\u5bf9\u591a\u5173\u7cfb\uff1a<\/strong>\u4e00\u79cd\u5173\u7cfb\uff0c\u591a\u4e2a\u5b9e\u4f53\u4e0e\u591a\u4e2a\u5b9e\u4f53\u76f8\u5173\u8054\uff0c\u4e14\u6bcf\u4e2a\u5b9e\u4f53\u53ef\u4ee5\u4e0e\u591a\u4e2a\u5176\u4ed6\u5b9e\u4f53\u76f8\u5173\u8054\u3002<\/li>\n<\/ul>\n<p><img alt=\"Many-to-Many cardinality example\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/09-erd-many-to-many-example.png\"\/><\/p>\n<ul>\n<li><strong>\u57fa\u6570\uff1a<\/strong>\u5728\u5173\u7cfb\u4e2d\u53ef\u4ee5\u4e0e\u53e6\u4e00\u4e2a\u5b9e\u4f53\u5173\u8054\u7684\u5b9e\u4f53\u6570\u91cf\u3002<\/li>\n<li><strong>\u53c2\u4e0e\u5ea6\uff1a<\/strong>\u5b9e\u4f53\u5728\u5173\u7cfb\u4e2d\u6240\u9700\u7684\u53c2\u4e0e\u7a0b\u5ea6\uff0c\u53ef\u4ee5\u662f\u53ef\u9009\u7684\u6216\u5f3a\u5236\u7684\u3002<\/li>\n<li><strong>\u4e3b\u952e\uff1a<\/strong>\u4e3b\u952e\uff08PK\uff09\u662f\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09\u7684\u4e00\u4e2a\u5173\u952e\u7ec4\u6210\u90e8\u5206\u3002\u5b83\u662f\u4e00\u4e2a\u5c5e\u6027\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u6570\u636e\u5e93\u8868\u4e2d\u7684\u6bcf\u4e00\u6761\u8bb0\u5f55\u3002\u4e3b\u952e\u786e\u4fdd\u8868\u4e2d\u6ca1\u6709\u91cd\u590d\u8bb0\u5f55\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5b83\u786e\u4fdd\u8868\u4e2d\u7684\u6bcf\u6761\u8bb0\u5f55\u90fd\u662f\u552f\u4e00\u7684\uff0c\u5e76\u4e14\u53ef\u4ee5\u65e0\u6b67\u4e49\u5730\u8bc6\u522b\u3002<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u7684ERD\u793a\u4f8b\u663e\u793a\u4e86\u4e00\u4e2a\u540d\u4e3a\u2018Product\u2019\u7684\u5b9e\u4f53\uff0c\u5176\u4e3b\u952e\u5c5e\u6027\u4e3a\u2018ID\u2019\uff0c\u4ee5\u53ca\u6570\u636e\u5e93\u4e2d\u8868\u8bb0\u5f55\u7684\u9884\u89c8\u3002\u7b2c\u4e09\u6761\u8bb0\u5f55\u65e0\u6548\uff0c\u56e0\u4e3aID\u503c\u2018PDT-0002\u2019\u5df2\u88ab\u53e6\u4e00\u6761\u8bb0\u5f55\u4f7f\u7528\u3002<\/p>\n<p><img alt=\"Primary Key\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/05-concept-of-erd-primary-key.png\"\/><\/p>\n<div class=\"space-gap-large\"><\/div>\n<p><strong>\u5916\u952e\uff1a<\/strong>\u5916\u952e\uff08\u901a\u5e38\u7b80\u79f0\u4e3aFK\uff09\u662f\u5efa\u7acb\u6570\u636e\u5e93\u4e2d\u5b9e\u4f53\u4e4b\u95f4\u5173\u7cfb\u7684\u5173\u952e\u8981\u7d20\u3002\u5b83\u6307\u5411\u53e6\u4e00\u5f20\u8868\u4e2d\u7684\u4e3b\u952e\uff0c\u7528\u4e8e\u5728\u4e24\u5f20\u8868\u4e4b\u95f4\u5efa\u7acb\u8fde\u63a5\u3002\u4e0e\u4e3b\u952e\u4e0d\u540c\uff0c\u5916\u952e\u53ef\u4ee5\u5305\u542b\u91cd\u590d\u503c\uff0c\u56e0\u4e3a\u4e00\u5f20\u8868\u4e2d\u7684\u591a\u6761\u8bb0\u5f55\u53ef\u4ee5\u5f15\u7528\u53e6\u4e00\u5f20\u8868\u4e2d\u7684\u540c\u4e00\u6761\u8bb0\u5f55\u3002\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u4f7f\u7528\u5916\u952e\uff0c\u901a\u8fc7\u5f3a\u5236\u76f8\u5173\u8868\u4e4b\u95f4\u7684\u53c2\u7167\u5b8c\u6574\u6027\uff0c\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<\/div>\n<div><\/div>\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\u4e0b\u9762\u7684ER\u56fe\u793a\u4f8b\u663e\u793a\u4e86\u4e00\u4e2a\u5b9e\u4f53\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e9b\u5217\uff0c\u5176\u4e2d\u4e00\u5217\u4f5c\u4e3a\u5916\u952e\u7528\u4e8e\u5f15\u7528\u53e6\u4e00\u4e2a\u5b9e\u4f53\u3002<\/div>\n<div><\/div>\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\"><img alt=\"Foreign Key\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/06-concept-of-erd-foreign-key.png\"\/><\/div>\n<\/div>\n<\/div>\n<div class=\"flex justify-between\">\n<div class=\"text-gray-400 flex self-end lg:self-center justify-center mt-2 gap-3 md:gap-4 lg:gap-1 lg:absolute lg:top-0 lg:translate-x-full lg:right-0 lg:mt-0 lg:pl-2 visible\">ER\u56fe\u7684\u7ec4\u6210\u90e8\u5206\u5305\u62ec\u5b9e\u4f53\u3001\u5c5e\u6027\u548c\u5173\u7cfb\u3002\u5b9e\u4f53\u662f\u5177\u6709\u552f\u4e00\u6807\u8bc6\u7684\u73b0\u5b9e\u4e16\u754c\u5bf9\u8c61\uff0c\u5c5e\u6027\u63d0\u4f9b\u6709\u5173\u5b9e\u4f53\u7684\u989d\u5916\u4fe1\u606f\uff0c\u5173\u7cfb\u63cf\u8ff0\u5b9e\u4f53\u4e4b\u95f4\u7684\u8fde\u63a5\u3002\u57fa\u6570\u548c\u53c2\u4e0e\u5ea6\u63cf\u8ff0\u5173\u7cfb\u7684\u5177\u4f53\u7279\u5f81\uff0c\u4ece\u800c\u5168\u9762\u5448\u73b0\u6570\u636e\u6a21\u578b\u3002<\/div>\n<\/div>\n<div><\/div>\n<div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"absolute bottom-0 left-0 w-full border-t md:border-t-0 dark:border-white\/20 md:border-transparent md:dark:border-transparent md:bg-vert-light-gradient bg-white dark:bg-gray-800 md:!bg-transparent dark:md:bg-vert-dark-gradient\">\n<form class=\"stretch mx-2 flex flex-row gap-3 pt-2 last:mb-2 md:last:mb-6 lg:mx-auto lg:max-w-3xl lg:pt-6\">\n<div class=\"relative flex h-full flex-1 md:flex-col\">\n<div class=\"flex ml-1 mt-1.5 md:w-full md:m-auto md:mb-2 gap-0 md:gap-2 justify-center\">\n<h2>ER\u56fe\u7684\u7c7b\u578b<\/h2>\n<div class=\"flex-1 overflow-hidden\">\n<div class=\"react-scroll-to-bottom--css-ypbly-79elbk h-full dark:bg-gray-800\">\n<div class=\"react-scroll-to-bottom--css-ypbly-1n7m0yu\">\n<div class=\"flex flex-col items-center text-sm dark:bg-gray-800\">\n<div class=\"w-full border-b border-black\/10 dark:border-gray-900\/50 text-gray-800 dark:text-gray-100 group bg-gray-50 dark:bg-[#444654]\">\n<div class=\"text-base gap-4 md:gap-6 m-auto md:max-w-2xl lg:max-w-2xl xl:max-w-3xl p-4 md:py-6 flex lg:px-0\">\n<div class=\"relative flex w-[calc(100%-50px)] flex-col gap-1 md:gap-3 lg:w-[calc(100%-115px)]\">\n<div class=\"flex flex-grow flex-col gap-3\">\n<div class=\"min-h-[20px] flex flex-col items-start gap-4 whitespace-pre-wrap\">\n<div class=\"markdown prose w-full break-words dark:prose-invert dark\">\n<p>ER\u56fe\u662f\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u5de5\u5177\uff0c\u4e3b\u8981\u6709\u4e09\u79cd\u7c7b\u578b\u7684ER\u56fe\uff1a\u6982\u5ff5\u578b\u3001\u903b\u8f91\u578b\u548c\u7269\u7406\u578b\u3002\u6bcf\u79cd\u7c7b\u578b\u7684\u56fe\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u8fc7\u7a0b\u7684\u4e0d\u540c\u9636\u6bb5\u4f7f\u7528\uff0c\u5e76\u63d0\u4f9b\u4e0d\u540c\u5c42\u6b21\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n<ol>\n<li>\u7b2c\u4e00\u79cdER\u56fe\u662f<strong>\u6982\u5ff5\u578bDFD<\/strong>\u5b83\u63d0\u4f9b\u4e86\u6570\u636e\u9700\u6c42\u548c\u5b9e\u4f53\u4e4b\u95f4\u5173\u7cfb\u7684\u9ad8\u5c42\u6b21\u89c6\u56fe\u3002\u7528\u4e8e\u8bc6\u522b\u4e3b\u8981\u5b9e\u4f53\u53ca\u5176\u5173\u7cfb\uff0c\u5e76\u63d0\u4f9b\u6570\u636e\u5e93\u6a21\u578b\u7684\u6e05\u6670\u7b80\u6d01\u6982\u89c8\u3002\u6982\u5ff5\u578bER\u56fe\u901a\u5e38\u7528\u4f5c\u5229\u76ca\u76f8\u5173\u8005\u4e0e\u5f00\u53d1\u4eba\u5458\u4e4b\u95f4\u7684\u6c9f\u901a\u5de5\u5177\uff0c\u4ee5\u786e\u4fdd\u9879\u76ee\u4e2d\u6240\u6709\u76f8\u5173\u4eba\u5458\u5bf9\u6570\u636e\u6a21\u578b\u6709\u5171\u540c\u7684\u7406\u89e3\u3002<\/li>\n<\/ol>\n<p><img alt=\"Conceptual data model\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/10-conceptual-data-model-example.png\"\/><\/p>\n<p>2. \u7b2c\u4e8c\u79cdER\u56fe\u662f<strong>\u903b\u8f91\u578bDFD<\/strong>\u5b83\u4ee5\u66f4\u8be6\u7ec6\u7684\u65b9\u5f0f\u8868\u793a\u6570\u636e\u6a21\u578b\uff0c\u5305\u62ec\u5173\u7cfb\u3001\u5c5e\u6027\u548c\u7ea6\u675f\u3002\u903b\u8f91\u578bER\u56fe\u63d0\u4f9b\u4e86\u6570\u636e\u6a21\u578b\u7684\u66f4\u8be6\u7ec6\u89c6\u56fe\uff0c\u7528\u4e8e\u5b8c\u5584\u6982\u5ff5\u6a21\u578b\u3002\u5b83\u4eec\u7528\u4e8e\u8bc6\u522b\u5b9e\u4f53\u4e4b\u95f4\u7684\u5177\u4f53\u5c5e\u6027\u548c\u5173\u7cfb\uff0c\u5e76\u5b9a\u4e49\u63a7\u5236\u6570\u636e\u6a21\u578b\u7684\u4e1a\u52a1\u89c4\u5219\u548c\u7ea6\u675f\u3002\u903b\u8f91\u578bER\u56fe\u5e38\u7528\u4e8e\u8bbe\u8ba1\u6570\u636e\u5e93\u6a21\u5f0f\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u6a21\u578b\u6ee1\u8db3\u7cfb\u7edf\u7684\u9700\u6c42\u3002<\/p>\n<p><img alt=\"Logical data model\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/11-logical-data-model-example.png\"\/><\/p>\n<p id=\"laNpOvY\"><img alt=\"\" class=\"alignnone size-full wp-image-10711\" decoding=\"async\" height=\"218\" loading=\"lazy\" sizes=\"auto, (max-width: 703px) 100vw, 703px\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/img_64006feb93eeb.png\" srcset=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/img_64006feb93eeb.png 703w, https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/img_64006feb93eeb-300x93.png 300w\" width=\"703\"\/><\/p>\n<p>3. \u7b2c\u4e09\u79cdER\u56fe\u662f<strong>\u7269\u7406\u578bDFD<\/strong>\u5b83\u7528\u4e8e\u8bbe\u8ba1\u6570\u636e\u5e93\u6a21\u5f0f\uff0c\u5e76\u63d0\u4f9b\u7269\u7406\u6570\u636e\u6a21\u578b\u7684\u8be6\u7ec6\u8868\u793a\u3002\u7269\u7406\u578bER\u56fe\u7528\u4e8e\u5c06\u903b\u8f91\u6570\u636e\u6a21\u578b\u6620\u5c04\u5230\u7269\u7406\u6570\u636e\u5e93\u6a21\u5f0f\uff0c\u5305\u62ec\u6570\u636e\u7c7b\u578b\u3001\u7d22\u5f15\u548c\u5b58\u50a8\u7ed3\u6784\u7b49\u7ec6\u8282\u3002\u5b83\u4eec\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u5e93\u6a21\u5f0f\u9ad8\u6548\u3001\u53ef\u6269\u5c55\u4e14\u6027\u80fd\u4f18\u5316\u3002<\/p>\n<p><img alt=\"Physical data model\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/12-physical-data-model-example.png\"\/><\/p>\n<p>\u7b80\u800c\u8a00\u4e4b\uff0cER\u56fe\u6709\u4e09\u79cd\u7c7b\u578b\uff1a\u6982\u5ff5\u578b\u3001\u903b\u8f91\u578b\u548c\u7269\u7406\u578b\u3002\u6982\u5ff5\u578bER\u56fe\u63d0\u4f9b\u6570\u636e\u9700\u6c42\u548c\u5b9e\u4f53\u4e4b\u95f4\u5173\u7cfb\u7684\u9ad8\u5c42\u6b21\u89c6\u56fe\uff0c\u800c\u903b\u8f91\u578bER\u56fe\u4ee5\u66f4\u8be6\u7ec6\u7684\u65b9\u5f0f\u8868\u793a\u6570\u636e\u6a21\u578b\u5e76\u5b9a\u4e49\u4e1a\u52a1\u89c4\u5219\u548c\u7ea6\u675f\u3002\u7269\u7406\u578bER\u56fe\u7528\u4e8e\u8bbe\u8ba1\u6570\u636e\u5e93\u6a21\u5f0f\uff0c\u5e76\u63d0\u4f9b\u7269\u7406\u6570\u636e\u6a21\u578b\u7684\u8be6\u7ec6\u8868\u793a\u3002\u6bcf\u79cd\u7c7b\u578b\u7684\u56fe\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u8fc7\u7a0b\u7684\u4e0d\u540c\u9636\u6bb5\u4f7f\u7528\uff0c\u5e76\u63d0\u4f9b\u4e0d\u540c\u5c42\u6b21\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"flex justify-between\">\n<div class=\"text-gray-400 flex self-end lg:self-center justify-center mt-2 gap-3 md:gap-4 lg:gap-1 lg:absolute lg:top-0 lg:translate-x-full lg:right-0 lg:mt-0 lg:pl-2 visible\">\n<h2>\u521b\u5efaER\u56fe<\/h2>\n<p>\u521b\u5efaER\u56fe\u662f\u8bbe\u8ba1\u6570\u636e\u5e93\u7684\u5173\u952e\u6b65\u9aa4\u3002T<span style=\"font-size: 1.125rem;\">\u8981\u521b\u5efaER\u56fe\uff0c\u9700\u8981\u8bc6\u522b\u5b9e\u4f53\u53ca\u5176\u5c5e\u6027\uff0c\u5b9a\u4e49\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\u5e76\u5206\u914d\u57fa\u6570\u548c\u53c2\u4e0e\u6027\uff0c\u6700\u540e\u4f7f\u7528\u7ed8\u56fe\u5de5\u5177\u6216\u8f6f\u4ef6\u521b\u5efaER\u56fe\u3002\u9075\u5faa\u8fd9\u4e9b\u6b65\u9aa4\u5c06\u6709\u52a9\u4e8e\u8bbe\u8ba1\u51fa\u6e05\u6670\u7b80\u6d01\u7684\u6570\u636e\u5e93\uff0c\u51c6\u786e\u53cd\u6620\u6570\u636e\u9700\u6c42\u548c\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\u3002<\/span><\/p>\n<p><span style=\"font-size: 1.125rem;\">\u521b\u5efaER\u56fe\u6d89\u53ca\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/span><\/p>\n<ol>\n<li><strong>\u8bc6\u522b\u5b9e\u4f53\u53ca\u5176\u5c5e\u6027\uff1a<\/strong>\u521b\u5efaER\u56fe\u7684\u7b2c\u4e00\u6b65\u662f\u8bc6\u522b\u5c06\u5728\u6570\u636e\u5e93\u4e2d\u8868\u793a\u7684\u5b9e\u4f53\u3002\u6bcf\u4e2a\u5b9e\u4f53\u90fd\u5e94\u5177\u6709\u552f\u4e00\u6807\u8bc6\uff0c\u5e76\u4e0e\u63cf\u8ff0\u5176\u7279\u5f81\u7684\u5c5e\u6027\u76f8\u5173\u8054\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u6b63\u5728\u8bbe\u8ba1\u4e00\u4e2a\u56fe\u4e66\u9986\u7684\u6570\u636e\u5e93\uff0c\u5b9e\u4f53\u53ef\u80fd\u662f\u4e66\u7c4d\u3001\u501f\u9605\u8005\u548c\u4f5c\u8005\u3002\u4e66\u7c4d\u5b9e\u4f53\u7684\u5c5e\u6027\u53ef\u80fd\u5305\u62ec\u4e66\u540d\u3001\u4f5c\u8005\u3001\u51fa\u7248\u793e\u548cISBN\u3002<\/li>\n<li><strong>\u5b9a\u4e49\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\uff1a<\/strong>\u521b\u5efaER\u56fe\u7684\u7b2c\u4e8c\u6b65\u662f\u5b9a\u4e49\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\u3002\u5173\u7cfb\u662f\u4e24\u4e2a\u6216\u591a\u4e2a\u5b9e\u4f53\u4e4b\u95f4\u7684\u8fde\u63a5\uff0c\u53ef\u4ee5\u662f\u4e00\u5bf9\u4e00\u3001\u4e00\u5bf9\u591a\u6216\u591a\u5bf9\u591a\u3002\u4f60\u9700\u8981\u4e3a\u6bcf\u4e2a\u5173\u7cfb\u5206\u914d\u57fa\u6570\u548c\u53c2\u4e0e\u6027\uff0c\u8fd9\u6709\u52a9\u4e8e\u5b9a\u4e49\u5173\u7cfb\u7684\u5177\u4f53\u7279\u5f81\u3002<\/li>\n<li><strong>\u5206\u914d\u57fa\u6570\u548c\u53c2\u4e0e\u6027\uff1a<\/strong>\u57fa\u6570\u548c\u53c2\u4e0e\u6027\u662f\u5b9e\u4f53\u4e4b\u95f4\u5173\u7cfb\u7684\u91cd\u8981\u7279\u5f81\u3002\u57fa\u6570\u63cf\u8ff0\u4e86\u4e00\u4e2a\u5173\u7cfb\u4e2d\u53ef\u4ee5\u4e0e\u53e6\u4e00\u4e2a\u5b9e\u4f53\u5173\u8054\u7684\u5b9e\u4f53\u6570\u91cf\u3002\u4f8b\u5982\uff0c\u4e00\u672c\u4e66\u53ef\u4ee5\u4e0e\u4e00\u4e2a\u6216\u591a\u4e2a\u4f5c\u8005\u5173\u8054\uff0c\u4f46\u4e00\u4e2a\u4f5c\u8005\u53ef\u4ee5\u4e0e\u591a\u672c\u4e66\u5173\u8054\u3002\u53c2\u4e0e\u6027\u63cf\u8ff0\u5b9e\u4f53\u5728\u5173\u7cfb\u4e2d\u6240\u9700\u7684\u53c2\u4e0e\u7a0b\u5ea6\uff0c\u53ef\u4ee5\u662f\u53ef\u9009\u7684\u6216\u5f3a\u5236\u7684\u3002<\/li>\n<li><strong>\u521b\u5efaER\u56fe\uff1a<\/strong>\u5728\u8bc6\u522b\u51fa\u5b9e\u4f53\u3001\u5b9a\u4e49\u5176\u5c5e\u6027\uff0c\u5e76\u5206\u914d\u4e86\u5177\u6709\u57fa\u6570\u548c\u53c2\u4e0e\u6027\u7684\u5173\u7cfb\u4e4b\u540e\uff0c\u662f\u65f6\u5019\u521b\u5efaER\u56fe\u4e86\u3002\u6709\u8bb8\u591a\u5de5\u5177\u53ef\u7528\u4e8e\u521b\u5efaER\u56fe\uff0c\u4f8b\u5982Visual Paradigm Online\u3001Visio\u548cVisual Paradigm\u684c\u9762\u7248\u3002\u8fd9\u4e9b\u5de5\u5177\u53ef\u8f7b\u677e\u521b\u5efa\u3001\u7f16\u8f91\u548c\u4fee\u6539ER\u56fe\uff0c\u5e76\u63d0\u4f9b\u5e7f\u6cdb\u7684\u81ea\u5b9a\u4e49\u9009\u9879\u4ee5\u6ee1\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/li>\n<\/ol>\n<h2>ER\u56fe\u793a\u4f8b<\/h2>\n<p><img alt=\"How to Generate Data Specification from ERD? - YouTube\" decoding=\"async\" src=\"https:\/\/www.cybermedian.com\/wp-content\/uploads\/2023\/03\/maxresdefault.jpg\"\/><\/p>\n<p>ER\u56fe\u53ef\u7528\u4e8e\u8868\u793a\u4e0d\u540c\u7cfb\u7edf\u4e2d\u7684\u5404\u79cd\u5b9e\u4f53\u548c\u5173\u7cfb\u3002<span style=\"font-size: 1.125rem;\">ER\u56fe\u7684\u793a\u4f8b\u6709\u52a9\u4e8e\u7406\u89e3\u5b9e\u4f53\u4e4b\u95f4\u4e0d\u540c\u7c7b\u578b\u7684\u5173\u7cfb\u3002<\/span><span style=\"font-size: 1.125rem;\">\u4e0b\u9762\u7684\u793a\u4f8b\u8bf4\u660e\u4e86ER\u56fe\u5982\u4f55\u7528\u4e8e\u8bbe\u8ba1\u548c\u7406\u89e3\u5404\u79cd\u60c5\u5883\u4e0b\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u4ece\u7535\u5b50\u5546\u52a1\u7f51\u7ad9\u5230\u533b\u9662\u7ba1\u7406\u7cfb\u7edf\u3002<\/span><\/p>\n<p>\u4ee5\u4e0b\u662f\u51e0\u4e2aER\u56fe\u793a\u4f8b\uff1a<\/p>\n<ol>\n<li><strong>\u7535\u5b50\u5546\u52a1\u7f51\u7ad9\uff1a<\/strong> \u7535\u5b50\u5546\u52a1\u7f51\u7ad9\u7684ER\u56fe\u53ef\u80fd\u5305\u62ec\u5ba2\u6237\u3001\u8ba2\u5355\u548c\u4ea7\u54c1\u7b49\u5b9e\u4f53\u3002\u8fd9\u4e9b\u5b9e\u4f53\u4e4b\u95f4\u7684\u5173\u7cfb\u53ef\u80fd\u5305\u62ec\u5ba2\u6237\u4e0b\u8ba2\u5355\uff0c\u4ee5\u53ca\u8ba2\u5355\u5305\u542b\u591a\u4e2a\u4ea7\u54c1\u3002ER\u56fe\u5c06\u4e3a\u6bcf\u4e2a\u5b9e\u4f53\u5305\u542b\u5c5e\u6027\uff0c\u4f8b\u5982\u5ba2\u6237\u59d3\u540d\u3001\u8ba2\u5355ID\u548c\u4ea7\u54c1\u4ef7\u683c\u3002<img alt=\"ER Diagram Example: Simple Order System | Entity 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