{"id":1623,"date":"2026-03-26T01:48:24","date_gmt":"2026-03-26T01:48:24","guid":{"rendered":"https:\/\/www.ez-knowledge.com\/cn\/enforcing-data-integrity-erd-constraints\/"},"modified":"2026-03-26T01:48:24","modified_gmt":"2026-03-26T01:48:24","slug":"enforcing-data-integrity-erd-constraints","status":"publish","type":"post","link":"https:\/\/www.ez-knowledge.com\/cn\/enforcing-data-integrity-erd-constraints\/","title":{"rendered":"\u901a\u8fc7\u4e25\u683c\u7684ERD\u7ea6\u675f\u5f3a\u5236\u5b9e\u65bd\u6570\u636e\u5b8c\u6574\u6027"},"content":{"rendered":"<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Kawaii-style infographic summarizing data integrity through ERD constraints: features cute database characters, four integrity layers (Entity, Domain, Referential, User-Defined), core constraint types (Primary Key, Foreign Key, Unique, Not Null, Check), relationship cardinality examples (One-to-One, One-to-Many, Many-to-Many), normalization steps (1NF, 2NF, 3NF), and implementation tips, all in pastel colors with friendly icons for educational web content about database design best practices\" decoding=\"async\" src=\"https:\/\/www.ez-knowledge.com\/wp-content\/uploads\/2026\/03\/kawaii-erd-data-integrity-constraints-infographic.jpg\"\/><\/figure>\n<\/div>\n<p>\u5728\u73b0\u4ee3\u6570\u636e\u67b6\u6784\u4e2d\uff0c\u4fe1\u606f\u7684\u53ef\u9760\u6027\u53d6\u51b3\u4e8e\u8bbe\u8ba1\u9636\u6bb5\u6240\u6784\u5efa\u7684\u7ed3\u6784\u5316\u4fdd\u62a4\u63aa\u65bd\u3002\u6570\u636e\u5b8c\u6574\u6027\u5e76\u975e\u4e8b\u540e\u8003\u8651\u7684\u95ee\u9898\uff0c\u800c\u662f\u53ef\u4fe1\u8d56\u7cfb\u7edf\u7684\u57fa\u77f3\u3002\u5728\u8bbe\u8ba1\u5b9e\u4f53\u5173\u7cfb\u56fe\uff08ERD\uff09\u65f6\uff0c\u76ee\u6807\u662f\u521b\u5efa\u4e00\u4e2a\u80fd\u591f\u5185\u5728\u9632\u6b62\u6570\u636e\u635f\u574f\u3001\u4e0d\u4e00\u81f4\u548c\u4e22\u5931\u7684\u84dd\u56fe\u3002\u901a\u8fc7\u5e94\u7528\u4e25\u683c\u7684\u7ea6\u675f\uff0c\u67b6\u6784\u5e08\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u5e93\u5728\u8d1f\u8f7d\u548c\u4e8b\u52a1\u8fc7\u7a0b\u4e2d\u884c\u4e3a\u53ef\u9884\u6d4b\u3002<\/p>\n<p>\u5982\u679c\u6ca1\u6709\u8fd9\u4e9b\u5f3a\u5236\u6267\u884c\u7684\u89c4\u5219\uff0c\u6570\u636e\u5c31\u5bb9\u6613\u53d7\u5230\u4eba\u4e3a\u9519\u8bef\u3001\u5e94\u7528\u7a0b\u5e8f\u6f0f\u6d1e\u548c\u5e76\u53d1\u8bbf\u95ee\u95ee\u9898\u7684\u5f71\u54cd\u3002\u4e00\u4e2a\u7ed3\u6784\u826f\u597d\u7684ERD\u5145\u5f53\u5e94\u7528\u7a0b\u5e8f\u903b\u8f91\u4e0e\u5b58\u50a8\u5c42\u4e4b\u95f4\u7684\u5951\u7ea6\uff0c\u660e\u786e\u754c\u5b9a\u54ea\u4e9b\u64cd\u4f5c\u662f\u5141\u8bb8\u7684\uff0c\u54ea\u4e9b\u662f\u7981\u6b62\u7684\u3002\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u901a\u8fc7\u4e25\u683c\u7684\u8bbe\u8ba1\u539f\u5219\u6765\u7ef4\u6301\u4e00\u81f4\u6027\u7684\u673a\u5236\u3002<\/p>\n<h2>\u7406\u89e3\u6570\u636e\u5b8c\u6574\u6027\u7684\u5c42\u6b21\u7ed3\u6784 \ud83d\udd0d<\/h2>\n<p>\u5b8c\u6574\u6027\u5e76\u975e\u5355\u4e00\u6982\u5ff5\uff0c\u800c\u662f\u9002\u7528\u4e8e\u6570\u636e\u5e93\u7ed3\u6784\u4e0d\u540c\u5c42\u7ea7\u7684\u4e00\u7cfb\u5217\u89c4\u5219\u3002\u8bc6\u522b\u8fd9\u4e9b\u5c42\u6b21\u6709\u52a9\u4e8e\u6709\u9488\u5bf9\u6027\u5730\u5b9e\u65bd\u7ea6\u675f\u3002<\/p>\n<h3>1. \u5b9e\u4f53\u5b8c\u6574\u6027<\/h3>\n<p>\u5b9e\u4f53\u5b8c\u6574\u6027\u786e\u4fdd\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u90fd\u662f\u552f\u4e00\u53ef\u8bc6\u522b\u7684\u3002\u8fd9\u662f\u4efb\u4f55\u5173\u7cfb\u6a21\u578b\u6700\u57fa\u672c\u7684\u8981\u6c42\u3002\u5982\u679c\u6ca1\u6709\u552f\u4e00\u6807\u8bc6\uff0c\u8ffd\u8e2a\u53d8\u66f4\u6216\u5173\u7cfb\u5c06\u53d8\u5f97\u4e0d\u53ef\u80fd\u3002<\/p>\n<ul>\n<li><strong>\u4e3b\u952e\uff1a<\/strong> \u4e00\u5217\u6216\u4e00\u7ec4\u5217\u88ab\u6307\u5b9a\u4e3a\u8bb0\u5f55\u7684\u552f\u4e00\u6807\u8bc6\u7b26\u3002<\/li>\n<li><strong>\u975e\u7a7a\uff1a<\/strong> \u4e3b\u952e\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\uff0c\u4ee5\u786e\u4fdd\u6bcf\u6761\u8bb0\u5f55\u90fd\u5b58\u5728\u3002<\/li>\n<li><strong>\u552f\u4e00\u6027\uff1a<\/strong> \u4e0d\u80fd\u6709\u4e24\u884c\u5171\u4eab\u76f8\u540c\u7684\u4e3b\u952e\u503c\u3002<\/li>\n<\/ul>\n<h3>2. \u57df\u5b8c\u6574\u6027<\/h3>\n<p>\u57df\u5b8c\u6574\u6027\u9650\u5236\u7279\u5b9a\u5217\u4e2d\u53ef\u4ee5\u653e\u7f6e\u7684\u503c\u3002\u8fd9\u786e\u4fdd\u6570\u636e\u4fdd\u6301\u5728\u9884\u671f\u7684\u53c2\u6570\u8303\u56f4\u5185\uff0c\u4f8b\u5982\u7c7b\u578b\u3001\u8303\u56f4\u6216\u683c\u5f0f\u3002<\/p>\n<ul>\n<li><strong>\u6570\u636e\u7c7b\u578b\uff1a<\/strong> \u786e\u4fdd\u5e74\u9f84\u5217\u4ec5\u5b58\u50a8\u6574\u6570\uff0c\u800c\u975e\u6587\u672c\u3002<\/li>\n<li><strong>\u68c0\u67e5\u7ea6\u675f\uff1a<\/strong> \u9a8c\u8bc1\u67d0\u4e2a\u503c\u662f\u5426\u843d\u5728\u7279\u5b9a\u8303\u56f4\u5185\uff0c\u4f8b\u59820\u5230100\u4e4b\u95f4\u7684\u767e\u5206\u6bd4\u3002<\/li>\n<li><strong>\u9ed8\u8ba4\u503c\uff1a<\/strong> \u5982\u679c\u63d2\u5165\u65f6\u672a\u63d0\u4f9b\u503c\uff0c\u5219\u63d0\u4f9b\u4e00\u4e2a\u5907\u7528\u503c\u3002<\/li>\n<\/ul>\n<h3>3. \u53c2\u7167\u5b8c\u6574\u6027<\/h3>\n<p>\u8fd9\u786e\u4fdd\u4e86\u8868\u4e4b\u95f4\u7684\u5173\u7cfb\u4fdd\u6301\u4e00\u81f4\u3002\u5982\u679c\u4e00\u4e2a\u8868\u4e2d\u7684\u8bb0\u5f55\u6307\u5411\u53e6\u4e00\u4e2a\u8868\u4e2d\u7684\u8bb0\u5f55\uff0c\u90a3\u4e48\u76ee\u6807\u8bb0\u5f55\u5fc5\u987b\u5b58\u5728\u3002\u8fd9\u53ef\u4ee5\u9632\u6b62\u5f15\u7528\u4e0d\u5b58\u5728\u6570\u636e\u7684\u5b64\u7acb\u8bb0\u5f55\u3002<\/p>\n<ul>\n<li><strong>\u5916\u952e\uff1a<\/strong> \u4e00\u5217\u94fe\u63a5\u5230\u53e6\u4e00\u5f20\u8868\u7684\u4e3b\u952e\u3002<\/li>\n<li><strong>\u7ea7\u8054\u89c4\u5219\uff1a<\/strong> \u5728\u7236\u8bb0\u5f55\u66f4\u6539\u65f6\u5b9a\u4e49\u64cd\u4f5c\uff08\u5220\u9664\u6216\u66f4\u65b0\uff09\u3002<\/li>\n<li><strong>\u7a7a\u503c\u5904\u7406\uff1a<\/strong> \u51b3\u5b9a\u5173\u7cfb\u662f\u5426\u53ef\u4ee5\u662f\u53ef\u9009\u7684\uff08\u7a7a\u503c\uff09\u6216\u5f3a\u5236\u7684\u3002<\/li>\n<\/ul>\n<h3>4. \u7528\u6237\u81ea\u5b9a\u4e49\u5b8c\u6574\u6027<\/h3>\n<p>\u8fd9\u4e9b\u662f\u7279\u5b9a\u4e8e\u4e1a\u52a1\u7684\u89c4\u5219\uff0c\u4e0d\u7b26\u5408\u6807\u51c6\u7c7b\u522b\u3002\u5b83\u4eec\u901a\u5e38\u9700\u8981\u5728\u8bbe\u8ba1\u6216\u5e94\u7528\u5c42\u4e2d\u4f7f\u7528\u81ea\u5b9a\u4e49\u903b\u8f91\u3002<\/p>\n<ul>\n<li><strong>\u81ea\u5b9a\u4e49\u9a8c\u8bc1\uff1a<\/strong> \u786e\u4fdd\u65e5\u671f\u4e0d\u5728\u672a\u6765\u3002<\/li>\n<li><strong>\u6761\u4ef6\u903b\u8f91\uff1a<\/strong> \u5982\u679c\u72b6\u6001\u4e3a\u201c\u5df2\u53d6\u6d88\u201d\uff0c\u5219\u4e0d\u5141\u8bb8\u5b58\u5728\u5176\u4ed6\u4ed8\u6b3e\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n<h2>\u6838\u5fc3ERD\u7ea6\u675f\u53ca\u5176\u5f71\u54cd \ud83e\uddf1<\/h2>\n<p>ERD\u5c06\u8fd9\u4e9b\u7ea6\u675f\u53ef\u89c6\u5316\uff0c\u4f7f\u5f00\u53d1\u4eba\u5458\u548c\u5229\u76ca\u76f8\u5173\u8005\u80fd\u591f\u6e05\u6670\u770b\u5230\u3002\u4e0b\u8868\u6982\u8ff0\u4e86\u5e38\u89c1\u7ea6\u675f\u3001\u5176\u76ee\u7684\u4ee5\u53ca\u5bf9\u6570\u636e\u4e00\u81f4\u6027\u7684\u5f71\u54cd\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7ea6\u675f\u7c7b\u578b<\/th>\n<th>\u529f\u80fd<\/th>\n<th>\u5f3a\u5236\u6267\u884c\u70b9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u4e3b\u952e<\/td>\n<td>\u552f\u4e00\u6807\u8bc6\u884c<\/td>\n<td>\u8868\u5b9a\u4e49<\/td>\n<\/tr>\n<tr>\n<td>\u5916\u952e<\/td>\n<td>\u8fde\u63a5\u8868<\/td>\n<td>\u5173\u7cfb\u7ebf<\/td>\n<\/tr>\n<tr>\n<td>\u552f\u4e00\u6027<\/td>\n<td>\u9632\u6b62\u5217\u4e2d\u51fa\u73b0\u91cd\u590d\u503c<\/td>\n<td>\u5217\u5b9a\u4e49<\/td>\n<\/tr>\n<tr>\n<td>\u975e\u7a7a<\/td>\n<td>\u5b57\u6bb5\u5fc5\u987b\u6709\u503c<\/td>\n<td>\u5217\u5b9a\u4e49<\/td>\n<\/tr>\n<tr>\n<td>\u68c0\u67e5<\/td>\n<td>\u6839\u636e\u6761\u4ef6\u9a8c\u8bc1\u503c<\/td>\n<td>\u5217\u6216\u8868\u5b9a\u4e49<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5f53\u8fd9\u4e9b\u7ea6\u675f\u5728\u8bbe\u8ba1\u4e2d\u88ab\u6b63\u786e\u5b9a\u4e49\u65f6\uff0c\u5e95\u5c42\u6570\u636e\u5e93\u5f15\u64ce\u4f1a\u81ea\u52a8\u5f3a\u5236\u6267\u884c\u5b83\u4eec\u3002\u8fd9\u5c06\u9a8c\u8bc1\u7684\u8d1f\u62c5\u4ece\u5e94\u7528\u4ee3\u7801\u4e2d\u79fb\u9664\uff0c\u964d\u4f4e\u4e86\u51fa\u73b0\u9519\u8bef\u548c\u5b89\u5168\u6f0f\u6d1e\u7684\u98ce\u9669\u3002<\/p>\n<h2>\u5173\u7cfb\u57fa\u6570\u4e0e\u5b8c\u6574\u6027 \ud83d\udd04<\/h2>\n<p>ERD\u4e2d\u8fde\u63a5\u5b9e\u4f53\u7684\u7ebf\u6761\u4ee3\u8868\u5173\u7cfb\u3002\u8fd9\u4e9b\u5173\u7cfb\u7684\u57fa\u6570\u51b3\u5b9a\u4e86\u6240\u9700\u5b8c\u6574\u6027\u89c4\u5219\u7684\u4e25\u683c\u7a0b\u5ea6\u3002<\/p>\n<h3>\u4e00\u5bf9\u4e00\u5173\u7cfb<\/h3>\n<p>\u5f53\u8868A\u4e2d\u7684\u8bb0\u5f55\u4e0e\u8868B\u4e2d\u7684\u8bb0\u5f55\u6070\u597d\u5339\u914d\u4e00\u6761\u65f6\uff0c\u5c31\u4f1a\u51fa\u73b0\u8fd9\u79cd\u60c5\u51b5\u3002\u8fd9\u901a\u5e38\u7528\u4e8e\u4e3a\u5b89\u5168\u6216\u6027\u80fd\u76ee\u7684\u62c6\u5206\u5927\u578b\u8868\u3002<\/p>\n<ul>\n<li><strong>\u7ea6\u675f\uff1a<\/strong> \u4e24\u8fb9\u901a\u5e38\u5bf9\u5916\u952e\u5f3a\u5236\u6267\u884c\u552f\u4e00\u6027\u3002<\/li>\n<li><strong> \u793a\u4f8b\uff1a<\/strong> \u4e00\u4e2a\u4eba\u53ca\u5176\u62a4\u7167\u3002\u4e00\u4e2a\u4eba\u62e5\u6709\u4e00\u672c\u62a4\u7167\uff1b\u4e00\u672c\u62a4\u7167\u5c5e\u4e8e\u4e00\u4e2a\u4eba\u3002<\/li>\n<\/ul>\n<h3>\u4e00\u5bf9\u591a\u5173\u7cfb<\/h3>\n<p>\u6700\u5e38\u89c1\u7684\u5173\u7cfb\u7c7b\u578b\u3002\u8868A\u4e2d\u7684\u4e00\u4e2a\u8bb0\u5f55\u53ef\u4ee5\u4e0e\u8868B\u4e2d\u7684\u591a\u4e2a\u8bb0\u5f55\u76f8\u5173\u8054\u3002<\/p>\n<ul>\n<li><strong>\u7ea6\u675f\uff1a<\/strong> \u5916\u952e\u4f4d\u4e8e\u201c\u591a\u201d\u65b9\u7684\u8868\u4e2d\u3002<\/li>\n<li><strong> \u5b8c\u6574\u6027\uff1a<\/strong> \u5916\u952e\u5fc5\u987b\u5f15\u7528\u201c\u4e00\u201d\u65b9\u8868\u4e2d\u5df2\u5b58\u5728\u7684\u4e3b\u952e\u3002<\/li>\n<li><strong> \u793a\u4f8b\uff1a<\/strong> 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