{"id":196219,"date":"2024-11-13T21:28:25","date_gmt":"2024-11-13T13:28:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196219\/"},"modified":"2024-11-13T21:28:26","modified_gmt":"2024-11-13T13:28:26","slug":"%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8e%9f%e7%90%86%ef%bc%8c%e7%a7%92%e6%ae%ba%e9%9d%a2%e8%a9%a6%e9%ab%98%e9%9b%a3%e5%ba%a6%e9%a1%8c%ef%bc%81-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196219\/","title":{"rendered":"\u638c\u63e1\u6578\u64da\u5eab\u539f\u7406\uff0c\u79d2\u6bba\u9762\u8a66\u9ad8\u96e3\u5ea6\u984c\uff01 (\u6578\u64da\u5eab\u539f\u7406\u9762\u8a66)"},"content":{"rendered":"<h1 id=\"%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8e%9f%e7%90%86%ef%bc%8c%e7%a7%92%e6%ae%ba%e9%9d%a2%e8%a9%a6%e9%ab%98%e9%9b%a3%e5%ba%a6%e9%a1%8c%ef%bc%81-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8e%9f%e7%90%86-GFtNVcqwRT\">\u638c\u63e1\u6578\u64da\u5eab\u539f\u7406\uff0c\u79d2\u6bba\u9762\u8a66\u9ad8\u96e3\u5ea6\u984c\uff01 (\u6578\u64da\u5eab\u539f\u7406\u9762\u8a66)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u79d1\u6280\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u5df2\u6210\u70ba\u5404\u884c\u5404\u696d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7121\u8ad6\u662f\u91d1\u878d\u3001\u91ab\u7642\u9084\u662f\u96fb\u5b50\u5546\u52d9\uff0c\u6578\u64da\u5eab\u7684\u61c9\u7528\u7121\u8655\u4e0d\u5728\u3002\u56e0\u6b64\uff0c\u638c\u63e1\u6578\u64da\u5eab\u539f\u7406\u5c0d\u65bc\u6c42\u8077\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\uff0c\u5c24\u5176\u662f\u5728\u9762\u8a66\u4e2d\uff0c\u6578\u64da\u5eab\u76f8\u95dc\u7684\u554f\u984c\u5f80\u5f80\u662f\u8003\u5b98\u91cd\u9ede\u95dc\u6ce8\u7684\u5167\u5bb9\u4e4b\u4e00\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-GFtNVcqwRT\">\u6578\u64da\u5eab\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u662f\u4e00\u7a2e\u6709\u7d44\u7e54\u7684\u6578\u64da\u96c6\u5408\uff0c\u901a\u5e38\u4ee5\u96fb\u5b50\u65b9\u5f0f\u5b58\u5132\u5728\u8a08\u7b97\u6a5f\u7cfb\u7d71\u4e2d\u3002\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u662f\u7528\u4f86\u5275\u5efa\u3001\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u7684\u8edf\u4ef6\u3002\u5e38\u898b\u7684\u6578\u64da\u5eab\u985e\u578b\u5305\u62ec\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982 MySQL\u3001PostgreSQL\uff09\u548c\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982 MongoDB\u3001Cassandra\uff09\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e5%8e%9f%e7%90%86-GFtNVcqwRT\">\u6578\u64da\u5eab\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e6%a8%a1%e5%9e%8b-GFtNVcqwRT\">1. \u6578\u64da\u6a21\u578b<\/h3>\n<p>\u6578\u64da\u6a21\u578b\u662f\u63cf\u8ff0\u6578\u64da\u7d50\u69cb\u548c\u6578\u64da\u4e4b\u9593\u95dc\u4fc2\u7684\u65b9\u5f0f\u3002\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4f7f\u7528\u8868\u683c\u4f86\u8868\u793a\u6578\u64da\uff0c\u6bcf\u500b\u8868\u683c\u7531\u884c\u548c\u5217\u7d44\u6210\u3002\u884c\u4ee3\u8868\u8a18\u9304\uff0c\u5217\u4ee3\u8868\u5c6c\u6027\u3002\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u5247\u4f7f\u7528\u6587\u6a94\u3001\u9375\u503c\u5c0d\u6216\u5716\u5f62\u7b49\u5f62\u5f0f\u4f86\u5b58\u5132\u6578\u64da\u3002<\/p>\n<h3 id=\"2-sql-%e8%aa%9e%e8%a8%80-GFtNVcqwRT\">2. SQL \u8a9e\u8a00<\/h3>\n<p>\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff08SQL\uff09\u662f\u8207\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4ea4\u4e92\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5b83\u5305\u62ec\u6578\u64da\u5b9a\u7fa9\u8a9e\u8a00\uff08DDL\uff09\u3001\u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\uff08DML\uff09\u548c\u6578\u64da\u63a7\u5236\u8a9e\u8a00\uff08DCL\uff09\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 SQL \u8a9e\u53e5\u5275\u5efa\u4e00\u500b\u8868\u683c\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT PRIMARY KEY,\n    name VARCHAR(100),\n    email VARCHAR(100)\n);<\/code><\/pre>\n<h3 id=\"3-%e4%ba%8b%e5%8b%99%e7%ae%a1%e7%90%86-GFtNVcqwRT\">3. \u4e8b\u52d9\u7ba1\u7406<\/h3>\n<p>\u4e8b\u52d9\u662f\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u57fa\u672c\u55ae\u4f4d\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4e8b\u52d9\u5177\u6709\u56db\u500b\u7279\u6027\uff0c\u901a\u5e38\u7a31\u70ba ACID \u539f\u5247\uff1a<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027 (Atomicity)<\/strong>\uff1a\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027 (Consistency)<\/strong>\uff1a\u4e8b\u52d9\u7684\u57f7\u884c\u5fc5\u9808\u4f7f\u6578\u64da\u5f9e\u4e00\u500b\u4e00\u81f4\u72c0\u614b\u8f49\u8b8a\u5230\u53e6\u4e00\u500b\u4e00\u81f4\u72c0\u614b\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027 (Isolation)<\/strong>\uff1a\u540c\u6642\u57f7\u884c\u7684\u4e8b\u52d9\u4e0d\u61c9\u4e92\u76f8\u5e72\u64fe\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027 (Durability)<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5176\u7d50\u679c\u61c9\u6c38\u4e45\u4fdd\u5b58\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%9d%a2%e8%a9%a6%e4%b8%ad%e5%b8%b8%e8%a6%8b%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e5%95%8f%e9%a1%8c-GFtNVcqwRT\">\u9762\u8a66\u4e2d\u5e38\u898b\u7684\u6578\u64da\u5eab\u554f\u984c<\/h2>\n<p>\u5728\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u554f\u5230\u4e00\u4e9b\u9ad8\u96e3\u5ea6\u7684\u6578\u64da\u5eab\u554f\u984c\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u4f8b\u5b50\uff1a<\/p>\n<h3 id=\"1-%e5%a6%82%e4%bd%95%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd%ef%bc%9f-GFtNVcqwRT\">1. \u5982\u4f55\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff1f<\/h3>\n<p>\u512a\u5316\u67e5\u8a62\u6027\u80fd\u53ef\u4ee5\u901a\u904e\u591a\u7a2e\u65b9\u5f0f\u5be6\u73fe\uff0c\u4f8b\u5982\u4f7f\u7528\u7d22\u5f15\u3001\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5168\u8868\u6383\u63cf\u3001\u5408\u7406\u8a2d\u8a08\u6578\u64da\u5eab\u7d50\u69cb\u7b49\u3002\u7d22\u5f15\u53ef\u4ee5\u52a0\u901f\u67e5\u8a62\uff0c\u4f46\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u9700\u8981\u5e73\u8861\u3002<\/p>\n<h3 id=\"2-%e8%a7%a3%e9%87%8b-join-%e7%9a%84%e9%a1%9e%e5%9e%8b%e5%8f%8a%e5%85%b6%e7%94%a8%e9%80%94%e3%80%82-GFtNVcqwRT\">2. \u89e3\u91cb JOIN \u7684\u985e\u578b\u53ca\u5176\u7528\u9014\u3002<\/h3>\n<p>JOIN \u7528\u65bc\u5c07\u591a\u500b\u8868\u683c\u4e2d\u7684\u6578\u64da\u7d50\u5408\u5728\u4e00\u8d77\u3002\u5e38\u898b\u7684 JOIN \u985e\u578b\u5305\u62ec INNER JOIN\u3001LEFT JOIN\u3001RIGHT JOIN \u548c FULL OUTER JOIN\u3002\u6bcf\u7a2e JOIN \u7684\u7528\u9014\u4e0d\u540c\uff0c\u6839\u64da\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684 JOIN \u985e\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h3 id=\"3-%e4%bb%80%e9%ba%bc%e6%98%af%e6%ad%a3%e8%a6%8f%e5%8c%96%ef%bc%9f%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e6%ad%a3%e8%a6%8f%e5%8c%96%ef%bc%9f-GFtNVcqwRT\">3. \u4ec0\u9ebc\u662f\u6b63\u898f\u5316\uff1f\u70ba\u4ec0\u9ebc\u9700\u8981\u6b63\u898f\u5316\uff1f<\/h3>\n<p>\u6b63\u898f\u5316\u662f\u5c07\u6578\u64da\u5eab\u8a2d\u8a08\u6210\u591a\u500b\u8868\u683c\u7684\u904e\u7a0b\uff0c\u4ee5\u6e1b\u5c11\u6578\u64da\u5197\u9918\u548c\u63d0\u9ad8\u6578\u64da\u5b8c\u6574\u6027\u3002\u901a\u904e\u6b63\u898f\u5316\uff0c\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u4e26\u4f7f\u6578\u64da\u5eab\u66f4\u6613\u65bc\u7dad\u8b77\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-GFtNVcqwRT\">\u7d50\u8ad6<\/h2>\n<p>\u638c\u63e1\u6578\u64da\u5eab\u539f\u7406\u4e0d\u50c5\u80fd\u5e6b\u52a9\u6c42\u8077\u8005\u5728\u9762\u8a66\u4e2d\u812b\u7a4e\u800c\u51fa\uff0c\u9084\u80fd\u70ba\u672a\u4f86\u7684\u8077\u696d\u751f\u6daf\u6253\u4e0b\u5805\u5be6\u7684\u57fa\u790e\u3002\u96a8\u8457\u6280\u8853\u7684\u767c\u5c55\uff0c\u6578\u64da\u5eab\u7684\u61c9\u7528\u5c07\u8d8a\u4f86\u8d8a\u5ee3\u6cdb\uff0c\u6301\u7e8c\u5b78\u7fd2\u548c\u66f4\u65b0\u77e5\u8b58\u662f\u6bcf\u4f4d IT \u5c08\u696d\u4eba\u58eb\u7684\u5fc5\u4fee\u8ab2\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u904b\u7528\u6709\u66f4\u6df1\u5165\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u7121\u8ad6\u662f\u958b\u767c\u6e2c\u8a66\u9084\u662f\u751f\u7522\u74b0\u5883\uff0c\u5747\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1\u6578\u64da\u5eab\u539f\u7406\uff0c\u8f15\u9b06\u61c9\u5c0d\u9762\u8a66\u9ad8\u96e3\u5ea6\u984c\uff0c\u63d0\u5347\u6c42\u8077\u7af6\u722d\u529b\uff0c\u52a9\u4f60\u6210\u529f\u7372\u5f97\u7406\u60f3\u8077\u4f4d\uff01<\/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-196219","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196219","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=196219"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196219\/revisions"}],"predecessor-version":[{"id":196220,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196219\/revisions\/196220"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}