{"id":186722,"date":"2024-11-11T08:17:27","date_gmt":"2024-11-11T00:17:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186722\/"},"modified":"2024-11-11T08:17:28","modified_gmt":"2024-11-11T00:17:28","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8a%80%e8%a1%93%e7%99%bc%e5%b1%95%e6%ad%b7%e7%a8%8b%ef%bc%9a%e5%be%9e%e6%96%87%e4%bb%b6%e7%b3%bb%e7%b5%b1%e5%88%b0%e9%97%9c%e4%bf%82%e6%95%b8%e6%93%9a%e5%ba%ab%e5%86%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186722\/","title":{"rendered":"\u6578\u64da\u5eab\u6280\u8853\u767c\u5c55\u6b77\u7a0b\uff1a\u5f9e\u6587\u4ef6\u7cfb\u7d71\u5230\u95dc\u4fc2\u6578\u64da\u5eab\u518d\u5230\u975e\u95dc\u4fc2\u6578\u64da\u5eab (\u6578\u64da\u5eab\u6280\u8853\u7d93\u6b77\u4e86\u54ea\u4e9b\u968e\u6bb5)"},"content":{"rendered":"

\u6578\u64da\u5eab\u6280\u8853\u767c\u5c55\u6b77\u7a0b\uff1a\u5f9e\u6587\u4ef6\u7cfb\u7d71\u5230\u95dc\u4fc2\u6578\u64da\u5eab\u518d\u5230\u975e\u95dc\u4fc2\u6578\u64da\u5eab<\/h1>\n

\u6578\u64da\u5eab\u6280\u8853\u7684\u767c\u5c55\u6b77\u7a0b\u53ef\u4ee5\u8ffd\u6eaf\u523020\u4e16\u7d0060\u5e74\u4ee3\uff0c\u7576\u6642\u7684\u6578\u64da\u5b58\u5132\u4e3b\u8981\u4f9d\u8cf4\u65bc\u6587\u4ef6\u7cfb\u7d71\u3002\u96a8\u8457\u8a08\u7b97\u6a5f\u6280\u8853\u7684\u9032\u6b65\uff0c\u6578\u64da\u5eab\u7684\u5f62\u5f0f\u548c\u529f\u80fd\u4e5f\u4e0d\u65b7\u6f14\u8b8a\uff0c\u5f9e\u6700\u521d\u7684\u6587\u4ef6\u7cfb\u7d71\u5230\u5f8c\u4f86\u7684\u95dc\u4fc2\u6578\u64da\u5eab\uff0c\u518d\u5230\u7576\u524d\u6d41\u884c\u7684\u975e\u95dc\u4fc2\u6578\u64da\u5eab\uff0c\u9019\u4e00\u904e\u7a0b\u53cd\u6620\u4e86\u6578\u64da\u7ba1\u7406\u9700\u6c42\u7684\u8b8a\u5316\u548c\u6280\u8853\u7684\u9032\u6b65\u3002<\/p>\n

1. \u6587\u4ef6\u7cfb\u7d71\u7684\u6642\u4ee3<\/h2>\n

\u5728\u6578\u64da\u5eab\u6280\u8853\u51fa\u73fe\u4e4b\u524d\uff0c\u6578\u64da\u4e3b\u8981\u5b58\u5132\u5728\u6587\u4ef6\u7cfb\u7d71\u4e2d\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u9ede\u662f\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u52a0\uff0c\u6587\u4ef6\u7cfb\u7d71\u7684\u5c40\u9650\u6027\u9010\u6f38\u986f\u73fe\u3002\u6578\u64da\u7684\u91cd\u8907\u3001\u5197\u9918\u548c\u4e0d\u4e00\u81f4\u6027\u6210\u70ba\u4e86\u4e3b\u8981\u554f\u984c\u3002\u6587\u4ef6\u7cfb\u7d71\u7121\u6cd5\u6709\u6548\u5730\u652f\u6301\u591a\u7528\u6236\u540c\u6642\u8a2a\u554f\uff0c\u9019\u4f7f\u5f97\u6578\u64da\u7684\u7ba1\u7406\u8b8a\u5f97\u56f0\u96e3\u3002<\/p>\n

2. \u95dc\u4fc2\u6578\u64da\u5eab\u7684\u8208\u8d77<\/h2>\n

1970\u5e74\u4ee3\uff0c\u57c3\u5fb7\u52a0\u00b7F\u00b7\u79d1\u5fb7\uff08Edgar F. Codd\uff09\u63d0\u51fa\u4e86\u95dc\u4fc2\u6578\u64da\u5eab\u7684\u6982\u5ff5\uff0c\u9019\u4e00\u5275\u65b0\u6a19\u8a8c\u8457\u6578\u64da\u5eab\u6280\u8853\u7684\u4e00\u6b21\u91cd\u5927\u98db\u8e8d\u3002\u95dc\u4fc2\u6578\u64da\u5eab\u4f7f\u7528\u8868\u683c\u4f86\u7d44\u7e54\u6578\u64da\uff0c\u4e26\u901a\u904e\u95dc\u4fc2\u4f86\u9023\u63a5\u4e0d\u540c\u7684\u6578\u64da\u96c6\u3002\u9019\u7a2e\u7d50\u69cb\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u4f7f\u5f97\u6578\u64da\u7684\u67e5\u8a62\u548c\u7ba1\u7406\u8b8a\u5f97\u66f4\u52a0\u9ad8\u6548\u3002<\/p>\n

\u95dc\u4fc2\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08RDBMS\uff09\u5982Oracle\u3001MySQL\u548cMicrosoft SQL Server\u7b49\uff0c\u6210\u70ba\u4e86\u4f01\u696d\u6578\u64da\u7ba1\u7406\u7684\u4e3b\u6d41\u9078\u64c7\u3002\u9019\u4e9b\u7cfb\u7d71\u652f\u6301SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\uff0c\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u65b9\u4fbf\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u548c\u67e5\u8a62\u3002<\/p>\n

2.1 SQL\u7684\u767c\u5c55<\/h3>\n

SQL\u7684\u51fa\u73fe\u4f7f\u5f97\u6578\u64da\u5eab\u64cd\u4f5c\u8b8a\u5f97\u66f4\u52a0\u76f4\u89c0\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u7c21\u55ae\u7684\u67e5\u8a62\u8a9e\u53e5\u4f86\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684SQL\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n

SELECT * FROM users WHERE age > 18;<\/code><\/pre>\n
\u9019\u689d\u8a9e\u53e5\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u5927\u65bc18\u6b72\u7684\u7528\u6236\u4fe1\u606f\uff0c\u986f\u793a\u4e86SQL\u5728\u6578\u64da\u6aa2\u7d22\u4e2d\u7684\u5f37\u5927\u529f\u80fd\u3002<\/p>\n
3. \u975e\u95dc\u4fc2\u6578\u64da\u5eab\u7684\u8208\u8d77<\/h2>\n
\u96a8\u8457\u4e92\u806f\u7db2\u7684\u5feb\u901f\u767c\u5c55\u548c\u5927\u6578\u64da\u6280\u8853\u7684\u8208\u8d77\uff0c\u50b3\u7d71\u7684\u95dc\u4fc2\u6578\u64da\u5eab\u5728\u8655\u7406\u6d77\u91cf\u6578\u64da\u548c\u9ad8\u4e26\u767c\u8a2a\u554f\u6642\u9762\u81e8\u6311\u6230\u3002\u9019\u4fc3\u4f7f\u4e86\u975e\u95dc\u4fc2\u6578\u64da\u5eab\uff08NoSQL\uff09\u7684\u51fa\u73fe\u3002\u975e\u95dc\u4fc2\u6578\u64da\u5eab\u4e0d\u518d\u4f9d\u8cf4\u65bc\u56fa\u5b9a\u7684\u8868\u683c\u7d50\u69cb\uff0c\u800c\u662f\u4f7f\u7528\u9375\u503c\u5c0d\u3001\u6587\u6a94\u3001\u5217\u65cf\u6216\u5716\u5f62\u7b49\u591a\u7a2e\u6578\u64da\u6a21\u578b\u4f86\u5b58\u5132\u6578\u64da\u3002<\/p>\n
\u4f8b\u5982\uff0cMongoDB\u662f\u4e00\u7a2e\u6d41\u884c\u7684\u6587\u6a94\u578b\u6578\u64da\u5eab\uff0c\u5b83\u5141\u8a31\u7528\u6236\u4ee5JSON\u683c\u5f0f\u5b58\u5132\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u9748\u6d3b\u7684\u67e5\u8a62\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u500bMongoDB\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n
db.users.find({ age: { $gt: 18 } });<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u5927\u65bc18\u6b72\u7684\u7528\u6236\uff0c\u986f\u793a\u4e86\u975e\u95dc\u4fc2\u6578\u64da\u5eab\u5728\u9748\u6d3b\u6027\u548c\u64f4\u5c55\u6027\u65b9\u9762\u7684\u512a\u52e2\u3002<\/p>\n
4. \u6578\u64da\u5eab\u6280\u8853\u7684\u672a\u4f86<\/h2>\n
\u96a8\u8457\u6280\u8853\u7684\u9032\u6b65\uff0c\u6578\u64da\u5eab\u6280\u8853\u4ecd\u5728\u4e0d\u65b7\u6f14\u8b8a\u3002\u96f2\u8a08\u7b97\u7684\u8208\u8d77\u4f7f\u5f97\u6578\u64da\u5eab\u7684\u90e8\u7f72\u548c\u7ba1\u7406\u8b8a\u5f97\u66f4\u52a0\u9748\u6d3b\uff0c\u8a31\u591a\u4f01\u696d\u9078\u64c7\u4f7f\u7528\u96f2\u6578\u64da\u5eab\u670d\u52d9\u4f86\u6eff\u8db3\u5176\u9700\u6c42\u3002\u6b64\u5916\uff0c\u4eba\u5de5\u667a\u80fd\u548c\u6a5f\u5668\u5b78\u7fd2\u7684\u61c9\u7528\u4e5f\u70ba\u6578\u64da\u5eab\u6280\u8853\u5e36\u4f86\u4e86\u65b0\u7684\u6311\u6230\u548c\u6a5f\u9047\u3002<\/p>\n
4.1 \u6578\u64da\u5eab\u7684\u81ea\u52d5\u5316\u7ba1\u7406<\/h3>\n
\u672a\u4f86\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u5c07\u66f4\u52a0\u667a\u80fd\u5316\uff0c\u80fd\u5920\u81ea\u52d5\u9032\u884c\u6027\u80fd\u8abf\u512a\u548c\u6545\u969c\u6aa2\u6e2c\uff0c\u6e1b\u5c11\u4eba\u5de5\u5e72\u9810\uff0c\u63d0\u9ad8\u904b\u884c\u6548\u7387\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u6578\u64da\u5eab\u6280\u8853\u7684\u767c\u5c55\u6b77\u7a0b\u5f9e\u6587\u4ef6\u7cfb\u7d71\u5230\u95dc\u4fc2\u6578\u64da\u5eab\uff0c\u518d\u5230\u975e\u95dc\u4fc2\u6578\u64da\u5eab\uff0c\u53cd\u6620\u4e86\u6578\u64da\u7ba1\u7406\u9700\u6c42\u7684\u8b8a\u5316\u548c\u6280\u8853\u7684\u9032\u6b65\u3002\u96a8\u8457\u96f2\u8a08\u7b97\u548c\u4eba\u5de5\u667a\u80fd\u7684\u767c\u5c55\uff0c\u672a\u4f86\u7684\u6578\u64da\u5eab\u6280\u8853\u5c07\u66f4\u52a0\u667a\u80fd\u548c\u9748\u6d3b\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u9999\u6e2fVPS<\/a><\/code>\u6216\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u6578\u64da\u5eab\u6280\u8853\u7684\u6f14\u8b8a\u6b77\u7a0b\uff0c\u5f9e\u65e9\u671f\u7684\u6587\u4ef6\u7cfb\u7d71\u5230\u95dc\u4fc2\u6578\u64da\u5eab\uff0c\u518d\u5230\u73fe\u4ee3\u7684\u975e\u95dc\u4fc2\u6578\u64da\u5eab\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-186722","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186722","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=186722"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186722\/revisions"}],"predecessor-version":[{"id":186723,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186722\/revisions\/186723"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}