{"id":9968,"date":"2023-03-02T17:47:01","date_gmt":"2023-03-02T09:47:01","guid":{"rendered":"https:\/\/www.cybermedian.com\/tw\/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\/tw\/10698-2\/","title":{"rendered":"\u5b78\u7fd2\u5be6\u9ad4\u95dc\u4fc2\u5716\uff1a\u5168\u9762\u6307\u5357"},"content":{"rendered":"<h2>ER\u5716\u7c21\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>\u5be6\u9ad4\u95dc\u4fc2\uff08ER\uff09\u5716\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5f37\u5927\u7684\u65b9\u5f0f\uff0c\u7528\u65bc\u8996\u89ba\u5316\u5448\u73fe\u7cfb\u7d71\u7684\u8cc7\u6599\u9700\u6c42\u4ee5\u53ca\u4e0d\u540c\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u5b83\u5728\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e2d\u5c24\u70ba\u6709\u7528\uff0c\u56e0\u70ba\u7406\u89e3\u5404\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u5c0d\u65bc\u5efa\u7acb\u9ad8\u6548\u4e14\u6709\u6548\u7684\u8cc7\u6599\u5eab\u7d50\u69cb\u81f3\u95dc\u91cd\u8981\u3002ER\u5716\u6709\u52a9\u65bc\u8b58\u5225\u4e0d\u540c\u7684\u5be6\u9ad4\u3001\u5b83\u5011\u7684\u5c6c\u6027\uff0c\u4ee5\u53ca\u5b83\u5011\u4e4b\u9593\u5b58\u5728\u7684\u95dc\u4fc2\uff0c\u5f9e\u800c\u63d0\u4f9b\u8cc7\u6599\u6a21\u578b\u7684\u5168\u9762\u6982\u89bd\u3002<\/p>\n<p>ER\u5716\u662f\u958b\u767c\u4eba\u54e1\u3001\u8a2d\u8a08\u5e2b\u548c\u5229\u76ca\u76f8\u95dc\u8005\u90fd\u6975\u70ba\u6709\u7528\u7684\u5de5\u5177\u3002\u958b\u767c\u4eba\u54e1\u548c\u8a2d\u8a08\u5e2b\u53ef\u4ee5\u5229\u7528ER\u5716\u4f86\u7406\u89e3\u8cc7\u6599\u6a21\u578b\u7684\u9700\u6c42\uff0c\u4e26\u5efa\u7acb\u65e2\u9ad8\u6548\u53c8\u6613\u65bc\u7dad\u8b77\u7684\u512a\u5316\u8cc7\u6599\u5eab\u7d50\u69cb\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5229\u76ca\u76f8\u95dc\u8005\u53ef\u4ee5\u5229\u7528ER\u5716\u4f86\u8996\u89ba\u5316\u7cfb\u7d71\u7684\u8cc7\u6599\u9700\u6c42\uff0c\u4e26\u63d0\u4f9b\u6539\u9032\u8a2d\u8a08\u7684\u610f\u898b\u3002<\/p>\n<p>\u7e3d\u9ad4\u800c\u8a00\uff0cER\u5716\u662f\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u7522\u696d\u548c\u61c9\u7528\u4e2d\u3002\u900f\u904e\u4f7f\u7528ER\u5716\uff0c\u958b\u767c\u4eba\u54e1\u3001\u8a2d\u8a08\u5e2b\u548c\u5229\u76ca\u76f8\u95dc\u8005\u53ef\u4ee5\u78ba\u4fdd\u8cc7\u6599\u6a21\u578b\u7684\u8a2d\u8a08\u7b26\u5408\u7cfb\u7d71\u7684\u9700\u6c42\uff0c\u5f9e\u800c\u5efa\u7acb\u51fa\u65e2\u9ad8\u6548\u53c8\u6709\u6548\u7684\u8cc7\u6599\u5eab\u3002<\/p>\n<h2>ER\u5716\u7684\u7d44\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\u5716\u7531\u4e09\u500b\u4e3b\u8981\u90e8\u5206\u7d44\u6210\uff1a\u5be6\u9ad4\u3001\u5c6c\u6027\u548c\u95dc\u4fc2\u3002\u9019\u4e9b\u90e8\u5206\u7528\u65bc\u5efa\u7acb\u8cc7\u6599\u6a21\u578b\u4ee5\u53ca\u4e0d\u540c\u5be6\u9ad4\u4e4b\u9593\u95dc\u4fc2\u7684\u8996\u89ba\u5316\u5448\u73fe\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>\u5be6\u9ad4\uff1a<\/strong>\u8cc7\u6599\u6a21\u578b\u4e2d\u6240\u4ee3\u8868\u7684\u73fe\u5be6\u4e16\u754c\u7269\u4ef6\uff0c\u4f8b\u5982\u5ba2\u6236\u6216\u8a02\u55ae\uff0c\u5177\u6709\u7368\u7279\u7684\u8eab\u4efd\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>\u5c6c\u6027\uff1a<\/strong>\u5be6\u9ad4\u7684\u7279\u5fb5\uff0c\u4f8b\u5982\u59d3\u540d\u3001\u5730\u5740\u6216\u8b58\u5225\u78bc\uff0c\u63d0\u4f9b\u95dc\u65bc\u5be6\u9ad4\u7684\u984d\u5916\u8cc7\u8a0a\uff0c\u4e26\u4f7f\u5176\u8207\u5176\u4ed6\u5be6\u9ad4\u5340\u5206\u958b\u4f86\u3002<\/li>\n<li><strong>\u95dc\u4fc2\uff1a<\/strong>\u5169\u500b\u6216\u591a\u500b\u5be6\u9ad4\u4e4b\u9593\u7684\u9023\u63a5\uff0c\u7528\u4ee5\u63cf\u8ff0\u5b83\u5011\u4e4b\u9593\u7684\u95dc\u4fc2\u3002<\/li>\n<li><strong>\u4e00\u5c0d\u4e00\u95dc\u4fc2\uff1a<\/strong>\u4e00\u7a2e\u95dc\u4fc2\uff0c\u5176\u4e2d\u4e00\u500b\u5be6\u9ad4\u8207\u53e6\u4e00\u500b\u5be6\u9ad4\u4ee5\u4e00\u5c0d\u4e00\u7684\u65b9\u5f0f\u95dc\u806f\uff0c\u8868\u793a\u6bcf\u500b\u5be6\u9ad4\u50c5\u8207\u53e6\u4e00\u500b\u5be6\u9ad4\u95dc\u806f\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\u5c0d\u591a\u95dc\u4fc2\uff1a<\/strong>\u4e00\u7a2e\u95dc\u4fc2\uff0c\u5176\u4e2d\u4e00\u500b\u5be6\u9ad4\u8207\u591a\u500b\u5be6\u9ad4\u95dc\u806f\uff0c\u800c\u6bcf\u500b\u95dc\u806f\u7684\u5be6\u9ad4\u50c5\u8207\u4e00\u500b\u5be6\u9ad4\u95dc\u806f\u3002<\/li>\n<li><strong>\u591a\u5c0d\u591a\u95dc\u4fc2\uff1a<\/strong>\u4e00\u7a2e\u95dc\u4fc2\uff0c\u5176\u4e2d\u591a\u500b\u5be6\u9ad4\u8207\u591a\u500b\u5be6\u9ad4\u95dc\u806f\uff0c\u4e14\u6bcf\u500b\u5be6\u9ad4\u53ef\u8207\u591a\u500b\u5176\u4ed6\u5be6\u9ad4\u95dc\u806f\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\u6578\uff1a<\/strong>\u5728\u4e00\u7a2e\u95dc\u4fc2\u4e2d\uff0c\u53ef\u8207\u53e6\u4e00\u500b\u5be6\u9ad4\u95dc\u806f\u7684\u5be6\u9ad4\u6578\u91cf\u3002<\/li>\n<li><strong>\u53c3\u8207\u5ea6\uff1a<\/strong>\u5be6\u9ad4\u5728\u95dc\u4fc2\u4e2d\u6240\u9700\u7684\u53c3\u8207\u7a0b\u5ea6\uff0c\u53ef\u70ba\u53ef\u9078\u6216\u5fc5\u8981\u3002<\/li>\n<li><strong>\u4e3b\u9375\uff1a<\/strong>\u4e3b\u9375\uff08PK\uff09\u662f\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e2d\u5be6\u9ad4\u95dc\u4fc2\u5716\uff08ERD\uff09\u7684\u4e00\u500b\u95dc\u9375\u8981\u7d20\u3002\u5b83\u662f\u4e00\u500b\u5c6c\u6027\uff0c\u7528\u65bc\u552f\u4e00\u8b58\u5225\u8cc7\u6599\u5eab\u8868\u683c\u4e2d\u7684\u6bcf\u4e00\u7b46\u8a18\u9304\u3002\u4e3b\u9375\u78ba\u4fdd\u8868\u683c\u4e2d\u4e0d\u6703\u51fa\u73fe\u91cd\u8907\u7684\u8a18\u9304\u3002\u63db\u53e5\u8a71\u8aaa\uff0c\u5b83\u78ba\u4fdd\u8868\u683c\u4e2d\u7684\u6bcf\u4e00\u7b46\u8a18\u9304\u90fd\u662f\u552f\u4e00\u7684\uff0c\u4e14\u53ef\u4ee5\u660e\u78ba\u8b58\u5225\u3002<\/li>\n<\/ul>\n<p>\u4e0b\u5716\u7684ERD\u7bc4\u4f8b\u986f\u793a\u4e86\u4e00\u500b\u540d\u70ba\u300c\u7522\u54c1\u300d\u7684\u5be6\u9ad4\uff0c\u5176\u4e3b\u9375\u5c6c\u6027\u70ba\u300cID\u300d\uff0c\u4e26\u5c55\u793a\u4e86\u8cc7\u6599\u5eab\u4e2d\u8868\u683c\u8a18\u9304\u7684\u9810\u89bd\u3002\u7b2c\u4e09\u7b46\u8a18\u9304\u7121\u6548\uff0c\u56e0\u70baID\u503c\u300cPDT-0002\u300d\u5df2\u88ab\u53e6\u4e00\u7b46\u8a18\u9304\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\u9375\uff1a<\/strong>\u5916\u9375\uff08\u901a\u5e38\u7c21\u7a31\u70baFK\uff09\u662f\u5efa\u7acb\u8cc7\u6599\u5eab\u4e2d\u5be6\u9ad4\u4e4b\u9593\u95dc\u4fc2\u7684\u95dc\u9375\u8981\u7d20\u3002\u5b83\u6307\u5411\u53e6\u4e00\u5f35\u8868\u683c\u4e2d\u7684\u4e3b\u9375\uff0c\u7528\u4ee5\u5efa\u7acb\u5169\u5f35\u8868\u683c\u4e4b\u9593\u7684\u9023\u63a5\u3002\u8207\u4e3b\u9375\u4e0d\u540c\uff0c\u5916\u9375\u53ef\u4ee5\u5305\u542b\u91cd\u8907\u503c\uff0c\u56e0\u70ba\u4e00\u5f35\u8868\u683c\u4e2d\u7684\u591a\u7b46\u8a18\u9304\u53ef\u4ee5\u53c3\u8003\u53e6\u4e00\u5f35\u8868\u683c\u4e2d\u7684\u540c\u4e00\u7b46\u8a18\u9304\u3002\u5728\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e2d\u4f7f\u7528\u5916\u9375\uff0c\u53ef\u900f\u904e\u5f37\u5236\u76f8\u95dc\u8868\u683c\u4e4b\u9593\u7684\u53c3\u7167\u5b8c\u6574\u6027\uff0c\u78ba\u4fdd\u8cc7\u6599\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\u5716\u7684ER\u5716\u7bc4\u4f8b\u986f\u793a\u4e86\u4e00\u500b\u5be6\u9ad4\u53ca\u5176\u90e8\u5206\u6b04\u4f4d\uff0c\u5176\u4e2d\u4e00\u500b\u5916\u9375\u7528\u65bc\u5f15\u7528\u53e6\u4e00\u500b\u5be6\u9ad4\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\u5716\u7684\u7d44\u6210\u90e8\u5206\u5305\u62ec\u5be6\u9ad4\u3001\u5c6c\u6027\u548c\u95dc\u4fc2\u3002\u5be6\u9ad4\u662f\u5177\u6709\u7368\u7279\u8eab\u4efd\u7684\u73fe\u5be6\u4e16\u754c\u7269\u4ef6\uff0c\u5c6c\u6027\u63d0\u4f9b\u95dc\u65bc\u5be6\u9ad4\u7684\u984d\u5916\u8cc7\u8a0a\uff0c\u95dc\u4fc2\u5247\u63cf\u8ff0\u5be6\u9ad4\u4e4b\u9593\u7684\u9023\u63a5\u3002\u57fa\u6578\u548c\u53c3\u8207\u5ea6\u63cf\u8ff0\u95dc\u4fc2\u7684\u5177\u9ad4\u7279\u5fb5\uff0c\u5f9e\u800c\u5b8c\u6574\u5448\u73fe\u8cc7\u6599\u6a21\u578b\u7684\u5168\u8c8c\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\u5716\u7684\u985e\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\u5716\u662f\u8cc7\u6599\u5eab\u8a2d\u8a08\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u5de5\u5177\uff0c\u4e3b\u8981\u6709\u4e09\u7a2e\u985e\u578b\u7684ER\u5716\uff1a\u6982\u5ff5\u578b\u3001\u908f\u8f2f\u578b\u548c\u7269\u7406\u578b\u3002\u6bcf\u7a2e\u5716\u8868\u5728\u8cc7\u6599\u5eab\u8a2d\u8a08\u904e\u7a0b\u7684\u4e0d\u540c\u968e\u6bb5\u4f7f\u7528\uff0c\u4e26\u63d0\u4f9b\u4e0d\u540c\u5c64\u6b21\u7684\u7d30\u7bc0\u3002<\/p>\n<ol>\n<li>\u7b2c\u4e00\u7a2eER\u5716\u662f<strong>\u6982\u5ff5\u578bDFD<\/strong>\u63d0\u4f9b\u8cc7\u6599\u9700\u6c42\u548c\u5be6\u9ad4\u4e4b\u9593\u95dc\u4fc2\u7684\u9ad8\u968e\u8996\u5716\u3002\u7528\u65bc\u8b58\u5225\u4e3b\u8981\u5be6\u9ad4\u53ca\u5176\u95dc\u4fc2\uff0c\u4e26\u63d0\u4f9b\u8cc7\u6599\u5eab\u6a21\u578b\u7684\u6e05\u6670\u4e14\u7c21\u55ae\u7684\u6574\u9ad4\u6982\u89c0\u3002\u6982\u5ff5\u578bER\u5716\u901a\u5e38\u4f5c\u70ba\u5229\u76ca\u76f8\u95dc\u8005\u8207\u958b\u767c\u4eba\u54e1\u4e4b\u9593\u7684\u6e9d\u901a\u5de5\u5177\uff0c\u7528\u65bc\u78ba\u4fdd\u5c08\u6848\u4e2d\u6240\u6709\u53c3\u8207\u8005\u5c0d\u8cc7\u6599\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\u7a2eER\u5716\u662f<strong>\u908f\u8f2f\u578bDFD<\/strong>\u4ee5\u66f4\u8a73\u7d30\u7684\u65b9\u5f0f\u5448\u73fe\u8cc7\u6599\u6a21\u578b\uff0c\u5305\u62ec\u95dc\u4fc2\u3001\u5c6c\u6027\u548c\u7d04\u675f\u3002\u908f\u8f2f\u578bER\u5716\u63d0\u4f9b\u8cc7\u6599\u6a21\u578b\u7684\u66f4\u8a73\u7d30\u8996\u5716\uff0c\u7528\u65bc\u7cbe\u7149\u6982\u5ff5\u6a21\u578b\u3002\u5b83\u5011\u7528\u65bc\u8b58\u5225\u5be6\u9ad4\u4e4b\u9593\u7684\u5177\u9ad4\u5c6c\u6027\u548c\u95dc\u4fc2\uff0c\u4e26\u5b9a\u7fa9\u898f\u7bc4\u8cc7\u6599\u6a21\u578b\u7684\u696d\u52d9\u898f\u5247\u548c\u7d04\u675f\u3002\u908f\u8f2f\u578bER\u5716\u901a\u5e38\u7528\u65bc\u8a2d\u8a08\u8cc7\u6599\u5eab\u67b6\u69cb\uff0c\u4e26\u78ba\u4fdd\u8cc7\u6599\u6a21\u578b\u7b26\u5408\u7cfb\u7d71\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\u7a2eER\u5716\u662f<strong>\u7269\u7406\u578bDFD<\/strong>\u7528\u65bc\u8a2d\u8a08\u8cc7\u6599\u5eab\u67b6\u69cb\uff0c\u4e26\u63d0\u4f9b\u7269\u7406\u8cc7\u6599\u6a21\u578b\u7684\u8a73\u7d30\u8868\u793a\u3002\u7269\u7406\u578bER\u5716\u7528\u65bc\u5c07\u908f\u8f2f\u8cc7\u6599\u6a21\u578b\u6620\u5c04\u5230\u7269\u7406\u8cc7\u6599\u5eab\u67b6\u69cb\uff0c\u4e26\u5305\u542b\u8cc7\u6599\u985e\u578b\u3001\u7d22\u5f15\u548c\u5132\u5b58\u7d50\u69cb\u7b49\u7d30\u7bc0\u3002\u5b83\u5011\u7528\u65bc\u78ba\u4fdd\u8cc7\u6599\u5eab\u67b6\u69cb\u5177\u6709\u6548\u7387\u3001\u53ef\u64f4\u5c55\u6027\uff0c\u4e26\u91dd\u5c0d\u6027\u80fd\u9032\u884c\u6700\u4f73\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>\u7c21\u800c\u8a00\u4e4b\uff0cER\u5716\u6709\u4e09\u7a2e\u985e\u578b\uff1a\u6982\u5ff5\u578b\u3001\u908f\u8f2f\u578b\u548c\u7269\u7406\u578b\u3002\u6982\u5ff5\u578bER\u5716\u63d0\u4f9b\u8cc7\u6599\u9700\u6c42\u548c\u5be6\u9ad4\u4e4b\u9593\u95dc\u4fc2\u7684\u9ad8\u968e\u8996\u5716\uff0c\u800c\u908f\u8f2f\u578bER\u5716\u4ee5\u66f4\u8a73\u7d30\u7684\u65b9\u5f0f\u5448\u73fe\u8cc7\u6599\u6a21\u578b\uff0c\u4e26\u5b9a\u7fa9\u696d\u52d9\u898f\u5247\u548c\u7d04\u675f\u3002\u7269\u7406\u578bER\u5716\u7528\u65bc\u8a2d\u8a08\u8cc7\u6599\u5eab\u67b6\u69cb\uff0c\u4e26\u63d0\u4f9b\u7269\u7406\u8cc7\u6599\u6a21\u578b\u7684\u8a73\u7d30\u8868\u793a\u3002\u6bcf\u7a2e\u5716\u8868\u5728\u8cc7\u6599\u5eab\u8a2d\u8a08\u904e\u7a0b\u7684\u4e0d\u540c\u968e\u6bb5\u4f7f\u7528\uff0c\u4e26\u63d0\u4f9b\u4e0d\u540c\u5c64\u6b21\u7684\u7d30\u7bc0\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>\u5efa\u7acbER\u5716<\/h2>\n<p>\u5efa\u7acbER\u5716\u662f\u8a2d\u8a08\u8cc7\u6599\u5eab\u7684\u95dc\u9375\u6b65\u9a5f\u3002T<span style=\"font-size: 1.125rem;\">\u8981\u5efa\u7acbER\u5716\uff0c\u60a8\u9700\u8981\u8b58\u5225\u5be6\u9ad4\u53ca\u5176\u5c6c\u6027\uff0c\u5b9a\u7fa9\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u4e26\u5206\u914d\u57fa\u6578\u548c\u6a21\u614b\uff0c\u6700\u5f8c\u4f7f\u7528\u7e6a\u5716\u5de5\u5177\u6216\u8edf\u9ad4\u5efa\u7acbER\u5716\u3002\u9075\u5faa\u9019\u4e9b\u6b65\u9a5f\u5c07\u5e6b\u52a9\u60a8\u8a2d\u8a08\u51fa\u6e05\u6670\u4e14\u7c21\u660e\u7684\u8cc7\u6599\u5eab\uff0c\u6e96\u78ba\u53cd\u6620\u8cc7\u6599\u9700\u6c42\u548c\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u3002<\/span><\/p>\n<p><span style=\"font-size: 1.125rem;\">\u5efa\u7acbER\u5716\u7684\u6b65\u9a5f\u5982\u4e0b\uff1a<\/span><\/p>\n<ol>\n<li><strong>\u8b58\u5225\u5be6\u9ad4\u53ca\u5176\u5c6c\u6027\uff1a<\/strong>\u5efa\u7acbER\u5716\u7684\u7b2c\u4e00\u6b65\u662f\u8b58\u5225\u5c07\u5728\u8cc7\u6599\u5eab\u4e2d\u8868\u793a\u7684\u5be6\u9ad4\u3002\u6bcf\u500b\u5be6\u9ad4\u61c9\u5177\u6709\u7368\u7279\u7684\u8eab\u5206\uff0c\u4e26\u8207\u63cf\u8ff0\u5176\u7279\u5fb5\u7684\u5c6c\u6027\u76f8\u95dc\u806f\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u6b63\u5728\u8a2d\u8a08\u5716\u66f8\u9928\u7684\u8cc7\u6599\u5eab\uff0c\u5be6\u9ad4\u53ef\u80fd\u5305\u62ec\u66f8\u7c4d\u3001\u501f\u95b1\u8005\u548c\u4f5c\u8005\u3002\u66f8\u7c4d\u5be6\u9ad4\u7684\u5c6c\u6027\u53ef\u80fd\u5305\u62ec\u66f8\u540d\u3001\u4f5c\u8005\u3001\u51fa\u7248\u793e\u548cISBN\u3002<\/li>\n<li><strong>\u5b9a\u7fa9\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\uff1a<\/strong>\u5efa\u7acbER\u5716\u7684\u7b2c\u4e8c\u6b65\u662f\u5b9a\u7fa9\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u95dc\u4fc2\u662f\u5169\u500b\u6216\u591a\u500b\u5be6\u9ad4\u4e4b\u9593\u7684\u9023\u7d50\uff0c\u53ef\u4ee5\u662f\u4e00\u5c0d\u4e00\u3001\u4e00\u5c0d\u591a\u6216\u591a\u5c0d\u591a\u3002\u60a8\u9700\u8981\u70ba\u6bcf\u7a2e\u95dc\u4fc2\u5206\u914d\u57fa\u6578\u548c\u6a21\u614b\uff0c\u9019\u5c07\u6709\u52a9\u65bc\u5b9a\u7fa9\u95dc\u4fc2\u7684\u5177\u9ad4\u7279\u5fb5\u3002<\/li>\n<li><strong>\u5206\u914d\u57fa\u6578\u548c\u6a21\u614b\uff1a<\/strong>\u57fa\u6578\u548c\u6a21\u614b\u662f\u5be6\u9ad4\u4e4b\u9593\u95dc\u4fc2\u7684\u91cd\u8981\u7279\u5fb5\u3002\u57fa\u6578\u63cf\u8ff0\u5728\u95dc\u4fc2\u4e2d\u53ef\u8207\u53e6\u4e00\u500b\u5be6\u9ad4\u95dc\u806f\u7684\u5be6\u9ad4\u6578\u91cf\u3002\u4f8b\u5982\uff0c\u4e00\u672c\u66f8\u53ef\u4ee5\u8207\u4e00\u4f4d\u6216\u591a\u500b\u4f5c\u8005\u95dc\u806f\uff0c\u4f46\u4e00\u4f4d\u4f5c\u8005\u53ef\u4ee5\u8207\u591a\u672c\u66f8\u95dc\u806f\u3002\u6a21\u614b\u63cf\u8ff0\u5be6\u9ad4\u5728\u95dc\u4fc2\u4e2d\u6240\u9700\u7684\u53c3\u8207\u7a0b\u5ea6\uff0c\u53ef\u4ee5\u662f\u53ef\u9078\u6216\u5fc5\u8981\u3002<\/li>\n<li><strong>\u5efa\u7acbER\u5716\uff1a<\/strong>\u5728\u8b58\u5225\u5be6\u9ad4\u3001\u5b9a\u7fa9\u5176\u5c6c\u6027\u4e26\u5206\u914d\u5177\u6709\u57fa\u6578\u548c\u6a21\u614b\u7684\u95dc\u4fc2\u5f8c\uff0c\u662f\u6642\u5019\u5efa\u7acbER\u5716\u4e86\u3002\u6709\u8a31\u591a\u5de5\u5177\u53ef\u7528\u65bc\u5efa\u7acbER\u5716\uff0c\u4f8b\u5982Visual Paradigm Online\u3001Visio\u548cVisual Paradigm\u684c\u9762\u7248\u3002\u9019\u4e9b\u5de5\u5177\u53ef\u8b93\u60a8\u8f15\u9b06\u5efa\u7acb\u3001\u7de8\u8f2f\u548c\u4fee\u6539ER\u5716\uff0c\u4e26\u63d0\u4f9b\u5ee3\u6cdb\u7684\u81ea\u8a02\u9078\u9805\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/li>\n<\/ol>\n<h2>ER\u5716\u7684\u7bc4\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\u5716\u53ef\u7528\u65bc\u5728\u4e0d\u540c\u7cfb\u7d71\u4e2d\u8868\u793a\u5404\u7a2e\u5be6\u9ad4\u548c\u95dc\u4fc2\u3002<span style=\"font-size: 1.125rem;\">ER\u5716\u7684\u7bc4\u4f8b\u6709\u52a9\u65bc\u7406\u89e3\u5be6\u9ad4\u4e4b\u9593\u4e0d\u540c\u985e\u578b\u7684\u95dc\u4fc2\u3002<\/span><span style=\"font-size: 1.125rem;\">\u4ee5\u4e0b\u7bc4\u4f8b\u8aaa\u660e\u4e86ER\u5716\u5982\u4f55\u7528\u65bc\u8a2d\u8a08\u548c\u7406\u89e3\u5404\u7a2e\u60c5\u5883\u4e0b\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\uff0c\u5f9e\u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\u5230\u91ab\u9662\u7ba1\u7406\u7cfb\u7d71\u3002<\/span><\/p>\n<p>\u4ee5\u4e0b\u662f\u5e7e\u500bER\u5716\u7684\u7bc4\u4f8b\uff1a<\/p>\n<ol>\n<li><strong>\u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\uff1a<\/strong> \u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\u7684ER\u5716\u53ef\u80fd\u5305\u542b\u5ba2\u6236\u3001\u8a02\u55ae\u548c\u7522\u54c1\u7b49\u5be6\u9ad4\u3002\u9019\u4e9b\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u53ef\u80fd\u5305\u62ec\u5ba2\u6236\u4e0b\u8a02\u55ae\uff0c\u4ee5\u53ca\u8a02\u55ae\u5305\u542b\u591a\u500b\u7522\u54c1\u3002ER\u5716\u5c07\u70ba\u6bcf\u500b\u5be6\u9ad4\u5305\u542b\u5c6c\u6027\uff0c\u4f8b\u5982\u5ba2\u6236\u59d3\u540d\u3001\u8a02\u55ae\u7de8\u865f\u548c\u7522\u54c1\u50f9\u683c\u3002<img alt=\"ER Diagram Example: Simple Order System | 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