{"id":58,"date":"2026-04-07T16:17:17","date_gmt":"2026-04-07T16:17:17","guid":{"rendered":"https:\/\/www.we-notes.com\/cn\/er-diagram-data-redundancy-legacy-migration\/"},"modified":"2026-04-07T16:17:17","modified_gmt":"2026-04-07T16:17:17","slug":"er-diagram-data-redundancy-legacy-migration","status":"publish","type":"post","link":"https:\/\/www.we-notes.com\/cn\/er-diagram-data-redundancy-legacy-migration\/","title":{"rendered":"\u6848\u4f8b\u7814\u7a76\uff1a\u4e00\u4e2a\u590d\u6742\u7684ER\u56fe\u5982\u4f55\u89e3\u51b3\u9057\u7559\u7cfb\u7edf\u8fc1\u79fb\u4e2d\u7684\u6570\u636e\u5197\u4f59\u95ee\u9898"},"content":{"rendered":"<p>\u5728\u6570\u636e\u67b6\u6784\u9886\u57df\uff0c\u5f88\u5c11\u6709\u6311\u6218\u6bd4\u9057\u7559\u7cfb\u7edf\u4e2d\u7684\u6570\u636e\u5197\u4f59\u95ee\u9898\u66f4\u6301\u4e45\u3002\u5f53\u7ec4\u7ec7\u52aa\u529b\u73b0\u4ee3\u5316\u5176\u57fa\u7840\u8bbe\u65bd\u65f6\uff0c\u5927\u91cf\u91cd\u590d\u3001\u4e0d\u4e00\u81f4\u548c\u5b64\u7acb\u7684\u6570\u636e\u5f80\u5f80\u6210\u4e3a\u4e3b\u8981\u74f6\u9888\u3002\u672c\u6848\u4f8b\u7814\u7a76\u5206\u6790\u4e86\u4e00\u4e2a\u771f\u5b9e\u573a\u666f\uff0c\u5176\u4e2d\u8be6\u7ec6\u7684\u5b9e\u4f53-\u5173\u7cfb\u56fe\uff08ERD\uff09\u4f5c\u4e3a\u89e3\u51b3\u91cd\u5927\u8fc1\u79fb\u9879\u76ee\u4e2d\u5173\u952e\u6570\u636e\u5b8c\u6574\u6027\u95ee\u9898\u7684\u84dd\u56fe\u3002<\/p>\n<p>\u76ee\u6807\u975e\u5e38\u660e\u786e\uff1a\u4ece\u4e00\u4e2a\u788e\u7247\u5316\u3001\u57fa\u4e8e\u5e73\u9762\u6587\u4ef6\u7684\u9057\u7559\u73af\u5883\uff0c\u8fc7\u6e21\u5230\u4e00\u4e2a\u5f3a\u5927\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0c\u540c\u65f6\u4e0d\u4e22\u5931\u6570\u636e\u7684\u5b8c\u6574\u6027\uff0c\u4e5f\u4e0d\u5f15\u5165\u65b0\u7684\u4e0d\u4e00\u81f4\u3002\u89e3\u51b3\u65b9\u6848\u5e76\u4e0d\u5728\u4e8e\u8fc1\u79fb\u5de5\u5177\u672c\u8eab\uff0c\u800c\u5728\u4e8e\u5728\u79fb\u52a8\u4efb\u4f55\u5b57\u8282\u4e4b\u524d\uff0c\u5bf9\u6570\u636e\u8fdb\u884c\u53ef\u89c6\u5316\u5efa\u6a21\u548c\u903b\u8f91\u7ed3\u6784\u5316\u3002\u6211\u4eec\u63a2\u8ba8\u4e86\u8be5\u65b9\u6cd5\u7684\u5b9e\u65bd\u8fc7\u7a0b\u3001\u9047\u5230\u7684\u5177\u4f53\u89c4\u8303\u5316\u6311\u6218\uff0c\u4ee5\u53ca\u91c7\u7528\u4e25\u8c28\u7684\u6a21\u5f0f\u8bbe\u8ba1\u65b9\u6cd5\u6240\u5e26\u6765\u7684\u5b9e\u9645\u6210\u679c\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Marker-style infographic illustrating how Entity-Relationship Diagrams solve data redundancy in legacy system migration, featuring before\/after database structure comparison, three normalization steps (1NF, 2NF, 3NF), visual ERD showing Customer-Account-Transaction-Branch relationships with cardinality labels, migration workflow (Extract-Cleanse-Transform-Map-Load), and key outcomes: 35% storage reduction, faster queries, single-update efficiency, and 100% data consistency\" decoding=\"async\" src=\"https:\/\/www.we-notes.com\/wp-content\/uploads\/2026\/04\/er-diagram-legacy-migration-infographic-marker-illustration.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83d\udd0d 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\u6848\u4f8b\u7814\u7a76\u573a\u666f\uff1a\u96f6\u552e\u94f6\u884c\u6574\u5408<\/h2>\n<p>\u5728\u672c\u6b21\u5206\u6790\u4e2d\uff0c\u6211\u4eec\u8003\u8651\u4e00\u5bb6\u96f6\u552e\u94f6\u884c\u673a\u6784\u4ece\u4e3b\u673a\u65f6\u4ee3\u7cfb\u7edf\u8fc1\u79fb\u5230\u57fa\u4e8e\u4e91\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\u3002\u9057\u7559\u7cfb\u7edf\u7ba1\u7406\u7740\u5ba2\u6237\u8d26\u6237\u3001\u4ea4\u6613\u548c\u8d37\u6b3e\u8bb0\u5f55\u3002\u7136\u800c\uff0c\u7531\u4e8e\u7cfb\u7edf\u5e74\u4ee3\u4e45\u8fdc\uff0c\u5ba2\u6237\u4fe1\u606f\u5728\u4ea4\u6613\u65e5\u5fd7\u4e2d\u88ab\u91cd\u590d\u5b58\u50a8\u3002<\/p>\n<p><strong>ERD\u5206\u6790\u4e4b\u524d\uff1a<\/strong><\/p>\n<table border=\"1\" cellpadding=\"5\" cellspacing=\"0\">\n<thead>\n<tr>\n<th>\u8868\u540d<\/th>\n<th>\u4e3b\u952e<\/th>\n<th>\u5197\u4f59\u6570\u636e<\/th>\n<th>\u95ee\u9898<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>TXN_LOG<\/strong><\/td>\n<td>TXN_ID<\/td>\n<td>\u5ba2\u6237\u59d3\u540d\u3001\u5730\u5740<\/td>\n<td>\u5730\u5740\u53d8\u66f4\u9700\u8981\u66f4\u65b0\u6570\u5343\u884c\u6570\u636e\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>ACCT_HIST<\/strong><\/td>\n<td>HIST_ID<\/td>\n<td>\u5206\u884c\u4ee3\u7801\u3001\u5206\u884c\u4f4d\u7f6e<\/td>\n<td>\u5206\u884c\u5173\u95ed\u5bfc\u81f4\u6570\u636e\u51b2\u7a81\u3002<\/td>\n<\/tr>\n<tr>\n<td><strong>LOAN_DETL<\/strong><\/td>\n<td>LOAN_ID<\/td>\n<td>\u5ba2\u6237ID\u3001\u8d26\u6237ID<\/td>\n<td>\u94fe\u63a5\u7ecf\u5e38\u7f3a\u5931\u6216\u91cd\u590d\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u79cd\u7ed3\u6784\u8fdd\u53cd\u4e86\u6570\u636e\u5e93\u8bbe\u8ba1\u7684\u57fa\u672c\u539f\u5219\u3002ERD\u8fc7\u7a0b\u8981\u6c42\u5c06\u8fd9\u4e9b\u8868\u5206\u89e3\u4e3a\u539f\u5b50\u7684\u3001\u72ec\u7acb\u7684\u5b9e\u4f53\u3002<\/p>\n<h2>\ud83e\udde9 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\u91d1\u878d\u673a\u6784\u5f00\u5c55\u94f6\u884c\u4e1a\u52a1\u7684\u5b9e\u4f53\u5730\u70b9\u3002<\/li>\n<\/ul>\n<p>\u5b9e\u4f53\u5b9a\u4e49\u5b8c\u6210\u540e\uff0c\u5efa\u7acb\u4e86\u5173\u7cfb\u3002ERD\u663e\u793a\uff0c\u4e00\u4e2a\u5ba2\u6237\u53ef\u4ee5\u6301\u6709\u591a\u4e2a\u8d26\u6237\u3002\u4e00\u4e2a\u8d26\u6237\u53ef\u4ee5\u6709\u591a\u4e2a\u4ea4\u6613\u3002\u4e00\u7b14\u4ea4\u6613\u4e0e\u7279\u5b9a\u7684\u5206\u652f\u673a\u6784\u76f8\u5173\u8054\u3002\u8fd9\u4e9b\u5173\u7cfb\u901a\u5e38\u8868\u793a\u4e3a\uff1a<\/p>\n<ul>\n<li><strong>\u4e00\u5bf9\u591a\uff081:N\uff09\uff1a<\/strong> \u4e00\u4e2a\u5ba2\u6237\u5bf9\u5e94\u591a\u4e2a\u8d26\u6237\u3002<\/li>\n<li><strong>\u4e00\u5bf9\u591a\uff081:N\uff09\uff1a<\/strong> \u4e00\u4e2a\u8d26\u6237\u5bf9\u5e94\u591a\u4e2a\u4ea4\u6613\u3002<\/li>\n<li><strong>\u591a\u5bf9\u4e00\uff08M:1\uff09\uff1a<\/strong> \u591a\u4e2a\u4ea4\u6613\u5bf9\u5e94\u4e00\u4e2a\u5206\u652f\u673a\u6784\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u53ef\u89c6\u5316\u8fd9\u4e9b\u8fde\u63a5\uff0c\u56e2\u961f\u8bc6\u522b\u51fa\u6570\u636e\u91cd\u590d\u7684\u4f4d\u7f6e\u3002\u4f8b\u5982\uff0c\u5ba2\u6237\u59d3\u540d\u51fa\u73b0\u5728<code>TXN_LOG<\/code> \u8868\u4e2d\u3002\u5728\u89c4\u8303\u5316\u6a21\u578b\u4e2d\uff0c\u4ea4\u6613\u8868\u5e94\u4ec5\u5305\u542b\u5bf9\u5ba2\u6237\u8868\u7684\u5f15\u7528\uff08\u5916\u952e\uff09\uff0c\u800c\u4e0d\u5e94\u5305\u542b\u6570\u636e\u672c\u8eab\u3002<\/p>\n<h2>\ud83d\udcd0 \u7b2c\u4e8c\u6b65\uff1a\u5e94\u7528\u89c4\u8303\u5316\u89c4\u5219<\/h2>\n<p>\u89c4\u8303\u5316\u662f\u7ec4\u7ec7\u6570\u636e\u4ee5\u51cf\u5c11\u5197\u4f59\u5e76\u63d0\u9ad8\u5b8c\u6574\u6027\u7684\u8fc7\u7a0b\u3002ERD\u6a21\u578b\u5f15\u5bfc\u56e2\u961f\u5b8c\u6210\u4e86\u6807\u51c6\u7684\u89c4\u8303\u5316\u5f62\u5f0f\u3002<\/p>\n<h3>\u7b2c\u4e00\u8303\u5f0f\uff081NF\uff09<\/h3>\n<p>\u65e7\u7cfb\u7edf\u4e2d\u5305\u542b\u91cd\u590d\u7ec4\u3002\u4f8b\u5982\uff0c\u65e7\u5ba2\u6237\u8868\u4e2d\u7684\u4e00\u884c\u53ef\u80fd\u5728\u4e00\u4e2a\u5217\u4e2d\u5305\u542b\u591a\u4e2a\u7535\u8bdd\u53f7\u7801\uff08\u4f8b\u5982\uff0c\u201c555-0199, 555-0200\u201d\uff09\u3002<\/p>\n<ul>\n<li><strong>\u95ee\u9898\uff1a<\/strong> \u8fd9\u4f7f\u5f97\u67e5\u8be2\u7279\u5b9a\u7535\u8bdd\u53f7\u7801\u53d8\u5f97\u56f0\u96be\uff0c\u5e76\u8fdd\u53cd\u4e86\u539f\u5b50\u6027\u539f\u5219\u3002<\/li>\n<li><strong>ERD\u89e3\u51b3\u65b9\u6848\uff1a<\/strong> \u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684<strong>Contact_Information<\/strong> \u5b9e\u4f53\uff0c\u4e0e\u5ba2\u6237\u5b9e\u4f53\u5173\u8054\u3002\u6b64\u65b0\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u4ec5\u5305\u542b\u4e00\u4e2a\u7535\u8bdd\u53f7\u7801\u3002<\/li>\n<\/ul>\n<h3>\u7b2c\u4e8c\u8303\u5f0f\uff082NF\uff09<\/h3>\n<p>2NF\u8981\u6c42\u8868\u5904\u4e8e1NF\u72b6\u6001\uff0c\u5e76\u4e14\u6240\u6709\u975e\u952e\u5c5e\u6027\u5fc5\u987b\u5b8c\u5168\u4f9d\u8d56\u4e8e\u4e3b\u952e\u3002\u65e7\u7cfb\u7edf\u7684<code>TXN_LOG<\/code> \u8868\u5177\u6709\u590d\u5408\u4e3b\u952e<code>TXN_ID<\/code> \u548c<code>DATE<\/code>\u3002\u7136\u800c\uff0c\u5ba2\u6237\u4fe1\u606f\u4ec5\u4f9d\u8d56\u4e8e<code>\u5ba2\u6237\u7f16\u53f7<\/code>\u800c\u4e0d\u662f\u4ea4\u6613\u65e5\u671f\u3002<\/p>\n<ul>\n<li><strong>\u95ee\u9898\uff1a<\/strong>\u5ba2\u6237\u6570\u636e\u5728\u6bcf\u6b21\u4ea4\u6613\u4e2d\u90fd\u88ab\u91cd\u590d\uff0c\u5bfc\u81f4\u66f4\u65b0\u5f02\u5e38\u3002<\/li>\n<li><strong>ERD\u89e3\u51b3\u65b9\u6848\uff1a<\/strong>\u4ece\u4ea4\u6613\u8868\u4e2d\u79fb\u9664\u5ba2\u6237\u8be6\u7ec6\u4fe1\u606f\u3002\u5c06\u5176\u5b58\u50a8\u5728\u4e13\u7528\u7684<strong>\u5ba2\u6237<\/strong>\u8868\u4e2d\uff0c\u5e76\u901a\u8fc7\u5916\u952e\u8fdb\u884c\u5173\u8054\u3002<\/li>\n<\/ul>\n<h3>\u7b2c\u4e09\u8303\u5f0f\uff083NF\uff09<\/h3>\n<p>3NF\u8981\u6c42\u6240\u6709\u5c5e\u6027\u4ec5\u4f9d\u8d56\u4e8e\u4e3b\u952e\uff0c\u4e0d\u5b58\u5728\u4f20\u9012\u4f9d\u8d56\u3002\u5728\u65e7\u7cfb\u7edf\u4e2d\uff0c<code>\u5206\u652f\u673a\u6784<\/code>\u540d\u79f0\u548c\u5730\u5740\u5b58\u50a8\u5728<code>\u8d26\u6237<\/code>\u8868\u4e2d\uff0c\u4f46\u5b83\u4eec\u4f9d\u8d56\u4e8e<code>\u5206\u652f\u673a\u6784\u7f16\u53f7<\/code>\uff0c\u800c\u4e0d\u662f<code>\u8d26\u6237\u7f16\u53f7<\/code>.<\/p>\n<ul>\n<li><strong>\u95ee\u9898\uff1a<\/strong>\u5982\u679c\u5206\u652f\u673a\u6784\u642c\u8fc1\uff0c\u6240\u6709\u4e0e\u8be5\u5206\u652f\u673a\u6784\u76f8\u5173\u7684\u8d26\u6237\u8bb0\u5f55\u90fd\u9700\u8981\u66f4\u65b0\u3002<\/li>\n<li><strong>ERD\u89e3\u51b3\u65b9\u6848\uff1a<\/strong>\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684<strong>\u5206\u652f\u673a\u6784<\/strong>\u8868\u3002\u73b0\u5728<code>\u8d26\u6237<\/code>\u8868\u4ec5\u5305\u542b<code>\u5206\u652f\u673a\u6784\u7f16\u53f7<\/code>.<\/li>\n<\/ul>\n<h2>\ud83d\udd04 \u7b2c\u4e09\u6b65\uff1a\u8fc1\u79fb\u6267\u884c\u7b56\u7565<\/h2>\n<p>\u5728\u5b9a\u4e49\u4e86\u65b0\u7684ERD\u540e\uff0c\u8fc1\u79fb\u8ba1\u5212\u56f4\u7ed5\u65b0\u67b6\u6784\u5c55\u5f00\u3002\u8be5\u8fc7\u7a0b\u5e76\u975e\u7b80\u5355\u7684\u590d\u5236\u7c98\u8d34\uff0c\u800c\u662f\u4e00\u6b21\u8f6c\u6362\u3002<\/p>\n<ol>\n<li><strong>\u6570\u636e\u63d0\u53d6\uff1a<\/strong>\u539f\u59cb\u6570\u636e\u4ece\u9057\u7559\u6e90\u7cfb\u7edf\u63d0\u53d6\u5230\u6682\u5b58\u533a\u3002<\/li>\n<li><strong>\u6e05\u6d17\uff1a<\/strong>\u6839\u636eERD\u4e2d\u5b9a\u4e49\u7684\u4e1a\u52a1\u952e\uff0c\u8bc6\u522b\u5e76\u5408\u5e76\u4e86\u91cd\u590d\u8bb0\u5f55\u3002<\/li>\n<li><strong>\u8f6c\u6362\uff1a<\/strong>\u7f16\u5199\u811a\u672c\uff0c\u6839\u636e1NF\u30012NF\u548c3NF\u89c4\u5219\uff0c\u5c06\u975e\u89c4\u8303\u5316\u7684\u5217\u62c6\u5206\u4e3a\u65b0\u8868\u3002<\/li>\n<li><strong>\u6620\u5c04\uff1a<\/strong>\u751f\u6210\u5916\u952e\u4ee5\u8fde\u63a5\u65b0\u8868\u3002\u4f7f\u7528\u4ee3\u7406\u952e\uff08\u7cfb\u7edf\u751f\u6210\u7684ID\uff09\u4ee5\u786e\u4fdd\u7a33\u5b9a\u6027\uff0c\u4e0d\u53d7\u9057\u7559\u4e1a\u52a1\u952e\u7684\u5f71\u54cd\u3002<\/li>\n<li><strong>\u52a0\u8f7d\uff1a<\/strong>\u6570\u636e\u6309\u7279\u5b9a\u987a\u5e8f\u63d2\u5165\u76ee\u6807\u6570\u636e\u5e93\uff0c\u4ee5\u9075\u5b88\u5f15\u7528\u5b8c\u6574\u6027\uff08\u7236\u8868\u5728\u5b50\u8868\u4e4b\u524d\uff09\u3002<\/li>\n<\/ol>\n<p>ERD\u5728\u6b64\u81f3\u5173\u91cd\u8981\u3002\u5b83\u51b3\u5b9a\u4e86\u52a0\u8f7d\u987a\u5e8f\u3002\u4f8b\u5982\uff0c<strong>\u5ba2\u6237<\/strong>\u8868\u5fc5\u987b\u5728<strong>\u8d26\u6237<\/strong>\u8868\u4e4b\u524d\u586b\u5145\uff0c\u800c<strong>\u4ea4\u6613<\/strong>\u8868\u4e4b\u524d\u586b\u5145\u3002\u5c1d\u8bd5\u4ee5\u5176\u4ed6\u987a\u5e8f\u52a0\u8f7d\u4f1a\u5bfc\u81f4\u7ea6\u675f\u8fdd\u53cd\u3002<\/p>\n<h2>\u2705 \u7b2c4\u6b65\uff1a\u9a8c\u8bc1\u4e0e\u6d4b\u8bd5<\/h2>\n<p>\u8fc1\u79fb\u540e\u7684\u9a8c\u8bc1\u5de5\u4f5c\u975e\u5e38\u5168\u9762\u3002\u76ee\u6807\u662f\u786e\u4fdd\u6570\u636e\u603b\u91cf\u4fdd\u6301\u4e0d\u53d8\uff0c\u5c3d\u7ba1\u7ed3\u6784\u5df2\u53d1\u751f\u53d8\u5316\u3002\u56e2\u961f\u5229\u7528ERD\u5b9a\u4e49\u4e86\u6570\u636e\u7684\u9884\u671f\u72b6\u6001\u3002<\/p>\n<h3>\u5b8c\u6574\u6027\u68c0\u67e5<\/h3>\n<ul>\n<li><strong>\u5f15\u7528\u5b8c\u6574\u6027\uff1a<\/strong>\u786e\u4fdd\u6bcf\u4e2a<code>\u5ba2\u6237ID<\/code>\u5728\u8d26\u6237\u8868\u4e2d\u90fd\u5b58\u5728\u4e8e\u5ba2\u6237\u8868\u4e2d\u3002<\/li>\n<li><strong>\u5b8c\u6574\u6027\uff1a<\/strong>\u9a8c\u8bc1\u8f6c\u6362\u8fc7\u7a0b\u4e2d\u662f\u5426\u4e22\u5931\u4e86\u4efb\u4f55\u8bb0\u5f55\u3002<\/li>\n<li><strong>\u552f\u4e00\u6027\uff1a<\/strong>\u786e\u8ba4\u4e3b\u952e\u662f\u552f\u4e00\u7684\uff0c\u4e14\u65b0\u8868\u4e2d\u4e0d\u5b58\u5728\u91cd\u590d\u6570\u636e\u3002<\/li>\n<\/ul>\n<h3>\u5bf9\u6bd4\u6307\u6807<\/h3>\n<p>\u4ee5\u4e0b\u6307\u6807\u7528\u4e8e\u6bd4\u8f83\u6e90\u7cfb\u7edf\u548c\u76ee\u6807\u7cfb\u7edf\uff1a<\/p>\n<table border=\"1\" cellpadding=\"5\" cellspacing=\"0\">\n<thead>\n<tr>\n<th>\u9a8c\u8bc1\u6307\u6807<\/th>\n<th>\u76ee\u6807\u6807\u51c6<\/th>\n<th>\u65b9\u6cd5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u8bb0\u5f55\u6570\u91cf<\/strong><\/td>\n<td>\u6e90\u6570\u636e\u6570\u91cf = \u76ee\u6807\u6570\u636e\u6570\u91cf<\/td>\n<td>\u6bcf\u4e2a\u89c4\u8303\u5316\u5b9e\u4f53\u7684\u884c\u6570<\/td>\n<\/tr>\n<tr>\n<td><strong>\u6570\u503c\u603b\u548c<\/strong><\/td>\n<td>\u6e90\u603b\u4f59\u989d = \u76ee\u6807\u603b\u4f59\u989d<\/td>\n<td>\u6570\u503c\u5b57\u6bb5\u7684\u805a\u5408<\/td>\n<\/tr>\n<tr>\n<td><strong>\u7a7a\u503c\u68c0\u67e5<\/strong><\/td>\n<td>\u975e\u7a7a\u5217\u4e2d\u65e0\u610f\u5916\u7684\u7a7a\u503c<\/td>\n<td>\u67e5\u8be2\u7ea6\u675f<\/td>\n<\/tr>\n<tr>\n<td><strong>\u91cd\u590d\u68c0\u67e5<\/strong><\/td>\n<td>\u4e3b\u952e\u4e0a\u65e0\u91cd\u590d<\/td>\n<td>GROUP BY \u5206\u6790<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\udcc9 \u5197\u4f59\u51cf\u5c11\u7684\u5f71\u54cd<\/h2>\n<p>\u4ece\u4f20\u7edf\u7ed3\u6784\u8f6c\u5411\u89c4\u8303\u5316ERD\u6a21\u578b\uff0c\u663e\u8457\u63d0\u5347\u4e86\u6027\u80fd\u548c\u7ef4\u62a4\u6548\u7387\u3002<\/p>\n<ul>\n<li><strong>\u5b58\u50a8\u6548\u7387\uff1a<\/strong>\u901a\u8fc7\u79fb\u9664\u91cd\u590d\u7684\u5ba2\u6237\u5730\u5740\u548c\u5206\u652f\u673a\u6784\u4fe1\u606f\uff0c\u5b58\u50a8\u9700\u6c42\u51cf\u5c11\u4e86\u7ea635%\u3002<\/li>\n<li><strong>\u67e5\u8be2\u6027\u80fd\uff1a<\/strong>\u4ee5\u5f80\u9700\u8981\u626b\u63cf\u5927\u578b\u975e\u89c4\u8303\u5316\u8868\u7684\u67e5\u8be2\uff0c\u73b0\u5728\u901a\u8fc7\u8fde\u63a5\u66f4\u5c0f\u3001\u5df2\u7d22\u5f15\u7684\u8868\uff0c\u901f\u5ea6\u663e\u8457\u63d0\u5347\u3002<\/li>\n<li><strong>\u66f4\u65b0\u901f\u5ea6\uff1a<\/strong>\u73b0\u5728\u66f4\u65b0\u5ba2\u6237\u5730\u5740\u53ea\u9700\u5728 <strong>\u5ba2\u6237<\/strong> 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