{"id":196802,"date":"2024-11-14T02:38:20","date_gmt":"2024-11-13T18:38:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196802\/"},"modified":"2024-11-14T02:38:21","modified_gmt":"2024-11-13T18:38:21","slug":"%e9%87%8d%e8%a6%81%e6%80%a7%e5%92%8c%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e8%a7%a3%e6%9e%90-%e4%bb%a5%e4%b8%8b%e9%97%9c%e6%96%bc%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e4%b8%ad%e7%af%84%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196802\/","title":{"rendered":"\u91cd\u8981\u6027\u548c\u5be6\u969b\u61c9\u7528\u89e3\u6790 (\u4ee5\u4e0b\u95dc\u65bc\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7bc4\u5f0f\u7684)"},"content":{"rendered":"<h1 id=\"%e9%87%8d%e8%a6%81%e6%80%a7%e5%92%8c%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e8%a7%a3%e6%9e%90%ef%bc%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e4%b8%ad%e7%9a%84%e7%af%84%e5%bc%8f-qEccyFbQdu\">\u91cd\u8981\u6027\u548c\u5be6\u969b\u61c9\u7528\u89e3\u6790\uff1a\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7684\u7bc4\u5f0f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u7bc4\u5f0f\uff08Normalization\uff09\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6982\u5ff5\u3002\u5b83\u7684\u4e3b\u8981\u76ee\u7684\u662f\u6e1b\u5c11\u6578\u64da\u5197\u9918\uff0c\u4e26\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002\u7bc4\u5f0f\u7684\u61c9\u7528\u4e0d\u50c5\u80fd\u5920\u63d0\u5347\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u9084\u80fd\u5920\u4f7f\u6578\u64da\u7684\u7ba1\u7406\u548c\u7dad\u8b77\u8b8a\u5f97\u66f4\u52a0\u9ad8\u6548\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u7bc4\u5f0f\u7684\u5b9a\u7fa9\u3001\u91cd\u8981\u6027\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u89e3\u6790\u3002<\/p>\n<h2 id=\"%e7%af%84%e5%bc%8f%e7%9a%84%e5%ae%9a%e7%be%a9-qEccyFbQdu\">\u7bc4\u5f0f\u7684\u5b9a\u7fa9<\/h2>\n<p>\u7bc4\u5f0f\u662f\u6307\u5c07\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u7d50\u69cb\u9032\u884c\u7d44\u7e54\u548c\u8a2d\u8a08\u7684\u904e\u7a0b\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u908f\u8f2f\u4e00\u81f4\u6027\u3002\u7bc4\u5f0f\u901a\u5e38\u5206\u70ba\u5e7e\u500b\u4e0d\u540c\u7684\u5c64\u6b21\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u7b2c\u4e00\u7bc4\u5f0f\uff081NF\uff09<\/strong>\uff1a\u8981\u6c42\u6bcf\u500b\u5b57\u6bb5\u90fd\u5fc5\u9808\u662f\u539f\u5b50\u6027\u7684\uff0c\u5373\u6bcf\u500b\u5b57\u6bb5\u53ea\u80fd\u5305\u542b\u4e00\u500b\u503c\u3002<\/li>\n<li><strong>\u7b2c\u4e8c\u7bc4\u5f0f\uff082NF\uff09<\/strong>\uff1a\u5728\u6eff\u8db3\u7b2c\u4e00\u7bc4\u5f0f\u7684\u57fa\u790e\u4e0a\uff0c\u8981\u6c42\u6bcf\u500b\u975e\u4e3b\u9375\u5b57\u6bb5\u5fc5\u9808\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002<\/li>\n<li><strong>\u7b2c\u4e09\u7bc4\u5f0f\uff083NF\uff09<\/strong>\uff1a\u5728\u6eff\u8db3\u7b2c\u4e8c\u7bc4\u5f0f\u7684\u57fa\u790e\u4e0a\uff0c\u8981\u6c42\u6bcf\u500b\u975e\u4e3b\u9375\u5b57\u6bb5\u5fc5\u9808\u76f4\u63a5\u4f9d\u8cf4\u65bc\u4e3b\u9375\uff0c\u800c\u4e0d\u662f\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u4e3b\u9375\u5b57\u6bb5\u3002<\/li>\n<li><strong>BCNF\uff08\u535a\u8328-\u79d1\u5fb7\u7bc4\u5f0f\uff09<\/strong>\uff1a\u9019\u662f\u4e00\u7a2e\u66f4\u56b4\u683c\u7684\u7bc4\u5f0f\uff0c\u8981\u6c42\u6bcf\u500b\u6c7a\u5b9a\u56e0\u7d20\u90fd\u5fc5\u9808\u662f\u8d85\u9375\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%af%84%e5%bc%8f%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7-qEccyFbQdu\">\u7bc4\u5f0f\u7684\u91cd\u8981\u6027<\/h2>\n<p>\u7bc4\u5f0f\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7684\u91cd\u8981\u6027\u4e3b\u8981\u9ad4\u73fe\u5728\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u6e1b\u5c11\u6578\u64da\u5197\u9918<\/strong>\uff1a\u901a\u904e\u5c07\u6578\u64da\u5206\u89e3\u70ba\u591a\u500b\u8868\u683c\uff0c\u7bc4\u5f0f\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u91cd\u8907\u6578\u64da\u7684\u5b58\u5132\uff0c\u5f9e\u800c\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u6578\u64da\u5b8c\u6574\u6027<\/strong>\uff1a\u7bc4\u5f0f\u80fd\u5920\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u6e96\u78ba\u6027\uff0c\u6e1b\u5c11\u56e0\u6578\u64da\u5197\u9918\u800c\u5c0e\u81f4\u7684\u932f\u8aa4\u3002<\/li>\n<li><strong>\u7c21\u5316\u6578\u64da\u7dad\u8b77<\/strong>\uff1a\u7576\u6578\u64da\u7d50\u69cb\u6e05\u6670\u4e14\u7121\u5197\u9918\u6642\uff0c\u5c0d\u6578\u64da\u7684\u66f4\u65b0\u548c\u7dad\u8b77\u8b8a\u5f97\u66f4\u52a0\u7c21\u55ae\u3002<\/li>\n<li><strong>\u63d0\u5347\u67e5\u8a62\u6027\u80fd<\/strong>\uff1a\u96d6\u7136\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u904e\u5ea6\u7bc4\u5f0f\u5316\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\uff0c\u4f46\u9069\u7576\u7684\u7bc4\u5f0f\u5316\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%af%84%e5%bc%8f%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-qEccyFbQdu\">\u7bc4\u5f0f\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u7bc4\u5f0f\u7684\u8a2d\u8a08\u904e\u7a0b\u901a\u5e38\u9700\u8981\u6839\u64da\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\u4f86\u9032\u884c\u8abf\u6574\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u61c9\u7528\u7bc4\u5f0f\uff1a<\/p>\n<pre><code>-- \u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5b78\u751f\u548c\u8ab2\u7a0b\u7684\u6578\u64da\u5eab\nCREATE TABLE Students (\n    StudentID INT PRIMARY KEY,\n    StudentName VARCHAR(100),\n    CourseID INT\n);\n\nCREATE TABLE Courses (\n    CourseID INT PRIMARY KEY,\n    CourseName VARCHAR(100)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5b78\u751f\u8868\uff08Students\uff09\u548c\u8ab2\u7a0b\u8868\uff08Courses\uff09\u4e4b\u9593\u5b58\u5728\u8457\u4e00\u5c0d\u591a\u7684\u95dc\u4fc2\u3002\u70ba\u4e86\u6eff\u8db3\u7b2c\u4e00\u7bc4\u5f0f\uff0c\u6211\u5011\u78ba\u4fdd\u6bcf\u500b\u5b57\u6bb5\u90fd\u662f\u539f\u5b50\u6027\u7684\u3002\u63a5\u4e0b\u4f86\uff0c\u70ba\u4e86\u6eff\u8db3\u7b2c\u4e8c\u7bc4\u5f0f\uff0c\u6211\u5011\u9700\u8981\u78ba\u4fdd\u6bcf\u500b\u975e\u4e3b\u9375\u5b57\u6bb5\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u5b78\u751f\u7684\u8ab2\u7a0b\u4fe1\u606f\u61c9\u8a72\u88ab\u5206\u958b\u5230\u8ab2\u7a0b\u8868\u4e2d\uff0c\u4ee5\u907f\u514d\u6578\u64da\u5197\u9918\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-qEccyFbQdu\">\u7d50\u8ad6<\/h2>\n<p>\u7bc4\u5f0f\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u626e\u6f14\u8457\u4e0d\u53ef\u6216\u7f3a\u7684\u89d2\u8272\u3002\u901a\u904e\u5408\u7406\u7684\u7bc4\u5f0f\u5316\u8a2d\u8a08\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u6578\u64da\u5197\u9918\uff0c\u63d0\u9ad8\u6578\u64da\u5b8c\u6574\u6027\uff0c\u4e26\u7c21\u5316\u6578\u64da\u7dad\u8b77\u904e\u7a0b\u3002\u96d6\u7136\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u904e\u5ea6\u7bc4\u5f0f\u5316\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u4f46\u9069\u7576\u7684\u7bc4\u5f0f\u5316\u4ecd\u7136\u662f\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u6700\u4f73\u5be6\u8e10\u4e4b\u4e00\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u8a2d\u8a08\u9084\u662f\u5176\u4ed6\u6280\u8853\u9700\u6c42\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u60a8\u7684\u696d\u52d9\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7bc4\u5f0f\u7684\u91cd\u8981\u6027\u53ca\u5176\u5be6\u969b\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\u8207\u7cfb\u7d71\u6027\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-196802","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=196802"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196802\/revisions"}],"predecessor-version":[{"id":196803,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196802\/revisions\/196803"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}