{"id":76090,"date":"2024-10-16T03:46:15","date_gmt":"2024-10-15T19:46:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76090\/"},"modified":"2024-10-16T03:46:15","modified_gmt":"2024-10-15T19:46:15","slug":"mysql%e8%87%a8%e6%99%82%e8%a1%a8%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e5%8a%9f%e8%83%bd%e7%b0%a1%e4%bb%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76090\/","title":{"rendered":"MySQL\u81e8\u6642\u8868\u7684\u5be6\u969b\u61c9\u7528\u529f\u80fd\u7c21\u4ecb"},"content":{"rendered":"<h1 id=\"mysql%e8%87%a8%e6%99%82%e8%a1%a8%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e5%8a%9f%e8%83%bd%e7%b0%a1%e4%bb%8b-DFCmmKotsG\">MySQL\u81e8\u6642\u8868\u7684\u5be6\u969b\u61c9\u7528\u529f\u80fd\u7c21\u4ecb<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u652f\u6301\u6578\u64da\u7684\u5b58\u5132\u548c\u8655\u7406\u3002\u5176\u4e2d\uff0c\u81e8\u6642\u8868\uff08Temporary Tables\uff09\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u7279\u5b9a\u7684\u6703\u8a71\u4e2d\u9032\u884c\u6578\u64da\u64cd\u4f5c\u800c\u4e0d\u5f71\u97ff\u4e3b\u6578\u64da\u8868\u3002\u672c\u6587\u5c07\u4ecb\u7d39MySQL\u81e8\u6642\u8868\u7684\u57fa\u672c\u6982\u5ff5\u3001\u5275\u5efa\u65b9\u6cd5\u53ca\u5176\u5be6\u969b\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%87%a8%e6%99%82%e8%a1%a8%ef%bc%9f-DFCmmKotsG\">\u4ec0\u9ebc\u662f\u81e8\u6642\u8868\uff1f<\/h2>\n<p>\u81e8\u6642\u8868\u662fMySQL\u4e2d\u4e00\u7a2e\u7279\u6b8a\u7684\u8868\uff0c\u9019\u7a2e\u8868\u53ea\u5728\u7576\u524d\u6703\u8a71\u4e2d\u5b58\u5728\uff0c\u7576\u6703\u8a71\u7d50\u675f\u6642\uff0c\u81e8\u6642\u8868\u6703\u81ea\u52d5\u88ab\u522a\u9664\u3002\u81e8\u6642\u8868\u7684\u4e3b\u8981\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6703\u8a71\u7bc4\u570d\uff1a\u81e8\u6642\u8868\u53ea\u5c0d\u5275\u5efa\u5b83\u7684\u6703\u8a71\u53ef\u898b\uff0c\u5176\u4ed6\u6703\u8a71\u7121\u6cd5\u8a2a\u554f\u3002<\/li>\n<li>\u81ea\u52d5\u522a\u9664\uff1a\u7576\u6703\u8a71\u7d50\u675f\u6642\uff0c\u81e8\u6642\u8868\u6703\u81ea\u52d5\u522a\u9664\uff0c\u7121\u9700\u624b\u52d5\u6e05\u7406\u3002<\/li>\n<li>\u6027\u80fd\u512a\u5316\uff1a\u81e8\u6642\u8868\u53ef\u4ee5\u7528\u4f86\u5b58\u5132\u4e2d\u9593\u7d50\u679c\uff0c\u6e1b\u5c11\u5c0d\u4e3b\u6578\u64da\u8868\u7684\u67e5\u8a62\u58d3\u529b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%ba%e8%87%a8%e6%99%82%e8%a1%a8-DFCmmKotsG\">\u5982\u4f55\u5275\u5efa\u81e8\u6642\u8868<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5275\u5efa\u81e8\u6642\u8868\u7684\u8a9e\u6cd5\u8207\u5275\u5efa\u666e\u901a\u8868\u76f8\u4f3c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TEMPORARY TABLE temp_table (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    name VARCHAR(100),\n    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba <code>temp_table<\/code> \u7684\u81e8\u6642\u8868\uff0c\u5305\u542b\u4e09\u500b\u5b57\u6bb5\uff1a<code>id<\/code>\u3001<code>name<\/code> \u548c <code>created_at<\/code>\u3002<\/p>\n<h2 id=\"%e8%87%a8%e6%99%82%e8%a1%a8%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-DFCmmKotsG\">\u81e8\u6642\u8868\u7684\u5be6\u969b\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u81e8\u6642\u8868\u5728\u591a\u7a2e\u60c5\u6cc1\u4e0b\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u61c9\u7528\u5834\u666f\uff1a<\/p>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e8%99%95%e7%90%86%e5%92%8c%e8%bd%89%e6%8f%9b-DFCmmKotsG\">1. \u6578\u64da\u8655\u7406\u548c\u8f49\u63db<\/h3>\n<p>\u5728\u9032\u884c\u8907\u96dc\u7684\u6578\u64da\u8655\u7406\u6642\uff0c\u81e8\u6642\u8868\u53ef\u4ee5\u7528\u4f86\u5b58\u5132\u4e2d\u9593\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u5728\u9032\u884c\u591a\u6b21\u67e5\u8a62\u548c\u8a08\u7b97\u5f8c\uff0c\u53ef\u4ee5\u5c07\u7d50\u679c\u5b58\u5132\u5230\u81e8\u6642\u8868\u4e2d\uff0c\u7136\u5f8c\u518d\u9032\u884c\u9032\u4e00\u6b65\u7684\u64cd\u4f5c\u3002<\/p>\n<pre><code>INSERT INTO temp_table (name)\nSELECT name FROM users WHERE active = 1;<\/code><\/pre>\n<h3 id=\"2-%e6%b8%9b%e5%b0%91%e6%9f%a5%e8%a9%a2%e8%b2%a0%e6%93%94-DFCmmKotsG\">2. \u6e1b\u5c11\u67e5\u8a62\u8ca0\u64d4<\/h3>\n<p>\u7576\u9700\u8981\u5c0d\u5927\u578b\u6578\u64da\u96c6\u9032\u884c\u591a\u6b21\u67e5\u8a62\u6642\uff0c\u4f7f\u7528\u81e8\u6642\u8868\u53ef\u4ee5\u6e1b\u5c11\u5c0d\u4e3b\u6578\u64da\u8868\u7684\u67e5\u8a62\u8ca0\u64d4\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c07\u67e5\u8a62\u7d50\u679c\u5b58\u5132\u5230\u81e8\u6642\u8868\u4e2d\uff0c\u7136\u5f8c\u5728\u81e8\u6642\u8868\u4e0a\u9032\u884c\u5f8c\u7e8c\u67e5\u8a62\u3002<\/p>\n<h3 id=\"3-%e6%95%b8%e6%93%9a%e5%88%86%e6%9e%90-DFCmmKotsG\">3. \u6578\u64da\u5206\u6790<\/h3>\n<p>\u5728\u6578\u64da\u5206\u6790\u904e\u7a0b\u4e2d\uff0c\u81e8\u6642\u8868\u53ef\u4ee5\u7528\u4f86\u5b58\u5132\u5206\u6790\u7d50\u679c\uff0c\u65b9\u4fbf\u5f8c\u7e8c\u7684\u5831\u544a\u751f\u6210\u548c\u6578\u64da\u53ef\u8996\u5316\u3002<\/p>\n<pre><code>SELECT COUNT(*) AS user_count\nFROM temp_table;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-DFCmmKotsG\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u81e8\u6642\u8868\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4e5f\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u81e8\u6642\u8868\u7684\u547d\u540d\uff1a\u81e8\u6642\u8868\u7684\u540d\u7a31\u5fc5\u9808\u552f\u4e00\uff0c\u907f\u514d\u8207\u5176\u4ed6\u8868\u540d\u885d\u7a81\u3002<\/li>\n<li>\u6027\u80fd\u8003\u91cf\uff1a\u96d6\u7136\u81e8\u6642\u8868\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u4f46\u904e\u591a\u7684\u81e8\u6642\u8868\u53ef\u80fd\u6703\u5c0e\u81f4\u8cc7\u6e90\u6d6a\u8cbb\u3002<\/li>\n<li>\u6578\u64da\u4e00\u81f4\u6027\uff1a\u5728\u4f7f\u7528\u81e8\u6642\u8868\u6642\uff0c\u9700\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-DFCmmKotsG\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u81e8\u6642\u8868\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u6578\u64da\u8655\u7406\u904e\u7a0b\u4e2d\u63d0\u9ad8\u6548\u7387\u548c\u6027\u80fd\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u8f49\u63db\u3001\u67e5\u8a62\u512a\u5316\u9084\u662f\u6578\u64da\u5206\u6790\u4e2d\uff0c\u81e8\u6642\u8868\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u5834\u666f\uff0c\u4f7f\u7528\u81e8\u6642\u8868\u7121\u7591\u662f\u4e00\u500b\u660e\u667a\u7684\u9078\u64c7\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\u4ee5\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u81e8\u6642\u8868\u7684\u5be6\u969b\u61c9\u7528\u529f\u80fd\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u64cd\u4f5c\uff0c\u52a9\u529b\u6578\u64da\u5206\u6790\u8207\u5831\u544a\u751f\u6210\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-76090","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76090","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=76090"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76090\/revisions"}],"predecessor-version":[{"id":76091,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76090\/revisions\/76091"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}