{"id":160765,"date":"2024-11-04T00:49:27","date_gmt":"2024-11-03T16:49:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160765\/"},"modified":"2024-11-04T00:49:28","modified_gmt":"2024-11-03T16:49:28","slug":"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql%e5%89%b5%e5%bb%ba%e8%a6%96%e5%9c%96%ef%bc%88create-view-%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160765\/","title":{"rendered":"\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL\u5275\u5efa\u8996\u5716\uff08CREATE VIEW \uff09"},"content":{"rendered":"<h1 id=\"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql%e5%89%b5%e5%bb%ba%e8%a6%96%e5%9c%96%ef%bc%88create-view%ef%bc%89-IFWBBqdXsR\">\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL\u5275\u5efa\u8996\u5716\uff08CREATE VIEW\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u8996\u5716\uff08View\uff09\u662f\u4e00\u7a2e\u865b\u64ec\u8868\u683c\uff0c\u5b83\u662f\u57fa\u65bc\u67e5\u8a62\u7d50\u679c\u7684\u96c6\u5408\u3002\u8996\u5716\u4e0d\u6703\u5132\u5b58\u6578\u64da\uff0c\u800c\u662f\u52d5\u614b\u751f\u6210\u6578\u64da\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u6578\u64da\u7ba1\u7406\u548c\u67e5\u8a62\u4e2d\u5177\u6709\u91cd\u8981\u7684\u4f5c\u7528\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728MySQL\u4e2d\u5275\u5efa\u8996\u5716\uff0c\u4e26\u63a2\u8a0e\u5176\u61c9\u7528\u5834\u666f\u53ca\u512a\u52e2\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%a6%96%e5%9c%96%ef%bc%9f-IFWBBqdXsR\">\u4ec0\u9ebc\u662f\u8996\u5716\uff1f<\/h2>\n<p>\u8996\u5716\u662f\u4e00\u500b\u547d\u540d\u7684\u67e5\u8a62\uff0c\u7576\u7528\u6236\u67e5\u8a62\u8996\u5716\u6642\uff0cMySQL\u6703\u57f7\u884c\u8a72\u67e5\u8a62\u4e26\u8fd4\u56de\u7d50\u679c\u3002\u8996\u5716\u53ef\u4ee5\u7c21\u5316\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u4e00\u500b\u66f4\u6613\u65bc\u4f7f\u7528\u7684\u6578\u64da\u63a5\u53e3\u3002\u8996\u5716\u7684\u4e3b\u8981\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u865b\u64ec\u6027\uff1a\u8996\u5716\u4e0d\u4f54\u7528\u7269\u7406\u5b58\u5132\u7a7a\u9593\uff0c\u6578\u64da\u662f\u52d5\u614b\u751f\u6210\u7684\u3002<\/li>\n<li>\u5b89\u5168\u6027\uff1a\u901a\u904e\u8996\u5716\uff0c\u53ef\u4ee5\u9650\u5236\u7528\u6236\u5c0d\u5e95\u5c64\u6578\u64da\u8868\u7684\u8a2a\u554f\u6b0a\u9650\u3002<\/li>\n<li>\u7c21\u5316\u67e5\u8a62\uff1a\u8996\u5716\u53ef\u4ee5\u5c01\u88dd\u8907\u96dc\u7684\u67e5\u8a62\u908f\u8f2f\uff0c\u4f7f\u7528\u8005\u53ea\u9700\u67e5\u8a62\u8996\u5716\u5373\u53ef\u7372\u5f97\u6240\u9700\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%89%b5%e5%bb%ba%e8%a6%96%e5%9c%96-IFWBBqdXsR\">\u5982\u4f55\u5275\u5efa\u8996\u5716<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5275\u5efa\u8996\u5716\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE VIEW view_name AS\nSELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>view_name<\/code>\u662f\u8996\u5716\u7684\u540d\u7a31\uff0c<code>SELECT<\/code>\u8a9e\u53e5\u5b9a\u7fa9\u4e86\u8996\u5716\u7684\u5167\u5bb9\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u5177\u9ad4\u7684\u4f8b\u5b50\uff1a<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%89%b5%e5%bb%ba%e4%b8%80%e5%80%8b%e7%b0%a1%e5%96%ae%e7%9a%84%e8%a6%96%e5%9c%96-IFWBBqdXsR\">\u793a\u4f8b\uff1a\u5275\u5efa\u4e00\u500b\u7c21\u55ae\u7684\u8996\u5716<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\u683c\uff0c\u5305\u542b\u4ee5\u4e0b\u5b57\u6bb5\uff1a<\/p>\n<ul>\n<li>id<\/li>\n<li>name<\/li>\n<li>department<\/li>\n<li>salary<\/li>\n<\/ul>\n<p>\u6211\u5011\u5e0c\u671b\u5275\u5efa\u4e00\u500b\u8996\u5716\uff0c\u986f\u793a\u6240\u6709\u85aa\u6c34\u9ad8\u65bc50000\u7684\u54e1\u5de5\u4fe1\u606f\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE VIEW high_salary_employees AS\nSELECT name, department, salary\nFROM employees\nWHERE salary &gt; 50000;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c\u5c07\u5275\u5efa\u4e00\u500b\u540d\u70ba<code>high_salary_employees<\/code>\u7684\u8996\u5716\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u67e5\u8a62\u9019\u500b\u8996\u5716\u4f86\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM high_salary_employees;<\/code><\/pre>\n<h2 id=\"%e6%9b%b4%e6%96%b0%e5%92%8c%e5%88%aa%e9%99%a4%e8%a6%96%e5%9c%96-IFWBBqdXsR\">\u66f4\u65b0\u548c\u522a\u9664\u8996\u5716<\/h2>\n<p>\u5982\u679c\u9700\u8981\u4fee\u6539\u5df2\u5b58\u5728\u7684\u8996\u5716\uff0c\u53ef\u4ee5\u4f7f\u7528<code>CREATE OR REPLACE VIEW<\/code>\u8a9e\u53e5\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE OR REPLACE VIEW high_salary_employees AS\nSELECT name, department, salary\nFROM employees\nWHERE salary &gt; 60000;<\/code><\/pre>\n<p>\u8981\u522a\u9664\u8996\u5716\uff0c\u53ef\u4ee5\u4f7f\u7528<code>DROP VIEW<\/code>\u8a9e\u53e5\uff1a<\/p>\n<pre><code>DROP VIEW high_salary_employees;<\/code><\/pre>\n<h2 id=\"%e8%a6%96%e5%9c%96%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-IFWBBqdXsR\">\u8996\u5716\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u8996\u5716\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u6709\u591a\u7a2e\u7528\u9014\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u5b89\u5168\uff1a\u901a\u904e\u8996\u5716\u9650\u5236\u7528\u6236\u5c0d\u654f\u611f\u6578\u64da\u7684\u8a2a\u554f\u3002<\/li>\n<li>\u6578\u64da\u6574\u5408\uff1a\u5c07\u4f86\u81ea\u591a\u500b\u8868\u7684\u6578\u64da\u6574\u5408\u5230\u4e00\u500b\u8996\u5716\u4e2d\uff0c\u65b9\u4fbf\u67e5\u8a62\u3002<\/li>\n<li>\u7c21\u5316\u5831\u544a\uff1a\u70ba\u5831\u544a\u751f\u6210\u63d0\u4f9b\u7c21\u5316\u7684\u6578\u64da\u63a5\u53e3\uff0c\u6e1b\u5c11\u67e5\u8a62\u7684\u8907\u96dc\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-IFWBBqdXsR\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u4e2d\u7684\u8996\u5716\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u7c21\u5316\u6578\u64da\u67e5\u8a62\u3001\u63d0\u9ad8\u6578\u64da\u5b89\u5168\u6027\u4ee5\u53ca\u6574\u5408\u591a\u500b\u6578\u64da\u6e90\u3002\u901a\u904e\u5b78\u7fd2\u5982\u4f55\u5275\u5efa\u548c\u7ba1\u7406\u8996\u5716\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u8655\u7406\u6578\u64da\uff0c\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u53ef\u7dad\u8b77\u6027\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0cServer.HK\u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\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\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728MySQL\u4e2d\u5275\u5efa\u8996\u5716\uff08CREATE VIEW\uff09\uff0c\u7c21\u5316\u67e5\u8a62\u4e26\u63d0\u9ad8\u6578\u64da\u7ba1\u7406\u6548\u7387\u7684\u5be6\u7528\u6559\u7a0b\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-160765","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160765","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=160765"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160765\/revisions"}],"predecessor-version":[{"id":160766,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160765\/revisions\/160766"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}