{"id":180578,"date":"2024-11-09T11:26:18","date_gmt":"2024-11-09T03:26:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180578\/"},"modified":"2024-11-09T11:26:19","modified_gmt":"2024-11-09T03:26:19","slug":"%e6%b7%b1%e5%85%a5%e5%88%86%e6%9e%90%e6%95%b8%e6%93%9a%e5%ba%ab%e5%af%a6%e4%be%8b%ef%bc%8c%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ad%98%e5%84%b2%e8%88%87%e8%a8%aa%e5%95%8f%e7%9a%84%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180578\/","title":{"rendered":"\u6df1\u5165\u5206\u6790\u6578\u64da\u5eab\u5be6\u4f8b\uff0c\u638c\u63e1\u6578\u64da\u5b58\u5132\u8207\u8a2a\u554f\u7684\u6280\u5de7 (\u6578\u64da\u5eab\u5be6\u4f8b\u5206\u6790)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e5%88%86%e6%9e%90%e6%95%b8%e6%93%9a%e5%ba%ab%e5%af%a6%e4%be%8b%ef%bc%8c%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ad%98%e5%84%b2%e8%88%87%e8%a8%aa%e5%95%8f%e7%9a%84%e6%8a%80%e5%b7%a7-yfgzbdehsp\">\u6df1\u5165\u5206\u6790\u6578\u64da\u5eab\u5be6\u4f8b\uff0c\u638c\u63e1\u6578\u64da\u5b58\u5132\u8207\u8a2a\u554f\u7684\u6280\u5de7<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u512a\u5316\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\u958b\u767c\u8005\uff0c\u638c\u63e1\u6578\u64da\u5eab\u7684\u5b58\u5132\u8207\u8a2a\u554f\u6280\u5de7\u90fd\u662f\u63d0\u5347\u61c9\u7528\u6027\u80fd\u7684\u95dc\u9375\u3002\u672c\u6587\u5c07\u6df1\u5165\u5206\u6790\u6578\u64da\u5eab\u5be6\u4f8b\uff0c\u63a2\u8a0e\u6578\u64da\u5b58\u5132\u8207\u8a2a\u554f\u7684\u6700\u4f73\u5be6\u8e10\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-yfgzbdehsp\">\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%ad%98%e5%84%b2%e7%9a%84%e6%8a%80%e5%b7%a7-yfgzbdehsp\">\u6578\u64da\u5b58\u5132\u7684\u6280\u5de7<\/h2>\n<h3 id=\"1-%e6%ad%a3%e8%a6%8f%e5%8c%96%e6%95%b8%e6%93%9a-yfgzbdehsp\">1. \u6b63\u898f\u5316\u6578\u64da<\/h3>\n<p>\u6b63\u898f\u5316\u662f\u5c07\u6578\u64da\u5206\u89e3\u6210\u591a\u500b\u8868\u683c\u7684\u904e\u7a0b\uff0c\u4ee5\u6d88\u9664\u6578\u64da\u5197\u9918\u4e26\u63d0\u9ad8\u6578\u64da\u5b8c\u6574\u6027\u3002\u9019\u4e00\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li>\u7b2c\u4e00\u6b63\u898f\u5f62\uff081NF\uff09\uff1a\u78ba\u4fdd\u6bcf\u500b\u8868\u683c\u7684\u6bcf\u4e00\u5217\u90fd\u662f\u539f\u5b50\u6027\u7684\u3002<\/li>\n<li>\u7b2c\u4e8c\u6b63\u898f\u5f62\uff082NF\uff09\uff1a\u6d88\u9664\u90e8\u5206\u4f9d\u8cf4\uff0c\u78ba\u4fdd\u6bcf\u500b\u975e\u4e3b\u9375\u5217\u90fd\u5b8c\u5168\u4f9d\u8cf4\u65bc\u4e3b\u9375\u3002<\/li>\n<li>\u7b2c\u4e09\u6b63\u898f\u5f62\uff083NF\uff09\uff1a\u6d88\u9664\u50b3\u905e\u4f9d\u8cf4\uff0c\u78ba\u4fdd\u975e\u4e3b\u9375\u5217\u4e0d\u4f9d\u8cf4\u65bc\u5176\u4ed6\u975e\u4e3b\u9375\u5217\u3002<\/li>\n<\/ul>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-yfgzbdehsp\">2. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u53ef\u4ee5\u52a0\u901f\u6578\u64da\u6aa2\u7d22\u3002\u901a\u904e\u5728\u8868\u683c\u7684\u67d0\u4e9b\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u7136\u800c\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u5beb\u5165\u6027\u80fd\uff0c\u56e0\u6b64\u9700\u8981\u6839\u64da\u5be6\u969b\u9700\u6c42\u9032\u884c\u5e73\u8861\u3002<\/p>\n<pre><code>CREATE INDEX idx_user_email ON users(email);<\/code><\/pre>\n<h3 id=\"3-%e9%81%a9%e7%95%b6%e9%81%b8%e6%93%87%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-yfgzbdehsp\">3. \u9069\u7576\u9078\u64c7\u6578\u64da\u985e\u578b<\/h3>\n<p>\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u53ef\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u4e26\u63d0\u9ad8\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u5b58\u5132\u65e5\u671f\u7684\u5b57\u6bb5\uff0c\u4f7f\u7528 DATE \u985e\u578b\u800c\u4e0d\u662f VARCHAR \u985e\u578b\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e8%a8%aa%e5%95%8f%e7%9a%84%e6%8a%80%e5%b7%a7-yfgzbdehsp\">\u6578\u64da\u8a2a\u554f\u7684\u6280\u5de7<\/h2>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e9%a0%90%e8%99%95%e7%90%86%e8%aa%9e%e5%8f%a5-yfgzbdehsp\">1. \u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5<\/h3>\n<p>\u9810\u8655\u7406\u8a9e\u53e5\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u4e26\u9632\u6b62 SQL \u6ce8\u5165\u653b\u64ca\u3002\u901a\u904e\u5c07 SQL \u8a9e\u53e5\u8207\u53c3\u6578\u5206\u958b\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u91cd\u7528\u67e5\u8a62\u8a08\u5283\u3002<\/p>\n<pre><code>PreparedStatement pstmt = connection.prepareStatement(\"SELECT * FROM users WHERE email = ?\");<\/code><\/pre>\n<h3 id=\"2-%e6%89%b9%e9%87%8f%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a-yfgzbdehsp\">2. \u6279\u91cf\u8655\u7406\u6578\u64da<\/h3>\n<p>\u5728\u9032\u884c\u5927\u91cf\u6578\u64da\u63d2\u5165\u6216\u66f4\u65b0\u6642\uff0c\u4f7f\u7528\u6279\u91cf\u8655\u7406\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u8207\u6578\u64da\u5eab\u7684\u4ea4\u4e92\u6b21\u6578\uff0c\u5f9e\u800c\u63d0\u9ad8\u6548\u7387\u3002<\/p>\n<pre><code>connection.setAutoCommit(false);\nPreparedStatement pstmt = connection.prepareStatement(\"INSERT INTO users (name, email) VALUES (?, ?)\");\nfor (User user : userList) {\n    pstmt.setString(1, user.getName());\n    pstmt.setString(2, user.getEmail());\n    pstmt.addBatch();\n}\npstmt.executeBatch();\nconnection.commit();<\/code><\/pre>\n<h3 id=\"3-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2-yfgzbdehsp\">3. \u512a\u5316\u67e5\u8a62<\/h3>\n<p>\u67e5\u8a62\u7684\u6027\u80fd\u5c0d\u6574\u9ad4\u61c9\u7528\u7684\u97ff\u61c9\u901f\u5ea6\u81f3\u95dc\u91cd\u8981\u3002\u4f7f\u7528 EXPLAIN \u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u627e\u51fa\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u512a\u5316\u3002<\/p>\n<pre><code>EXPLAIN SELECT * FROM users WHERE email = 'example@example.com';<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-yfgzbdehsp\">\u7d50\u8ad6<\/h2>\n<p>\u638c\u63e1\u6578\u64da\u5eab\u7684\u5b58\u5132\u8207\u8a2a\u554f\u6280\u5de7\u5c0d\u65bc\u63d0\u5347\u61c9\u7528\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u6b63\u898f\u5316\u6578\u64da\u3001\u4f7f\u7528\u7d22\u5f15\u3001\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u3001\u4f7f\u7528\u9810\u8655\u7406\u8a9e\u53e5\u3001\u6279\u91cf\u8655\u7406\u6578\u64da\u4ee5\u53ca\u512a\u5316\u67e5\u8a62\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u3002\u9019\u4e9b\u6280\u5de7\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u7684\u5b58\u53d6\u6548\u7387\uff0c\u9084\u80fd\u589e\u5f37\u7cfb\u7d71\u7684\u5b89\u5168\u6027\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u5206\u6790\u6578\u64da\u5eab\u5be6\u4f8b\uff0c\u638c\u63e1\u6578\u64da\u5b58\u5132\u8207\u8a2a\u554f\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u52a9\u529b\u696d\u52d9\u6c7a\u7b56\u8207\u512a\u5316\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-180578","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180578","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=180578"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180578\/revisions"}],"predecessor-version":[{"id":180579,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180578\/revisions\/180579"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}