{"id":200045,"date":"2025-05-06T10:10:14","date_gmt":"2025-05-06T02:10:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200045\/"},"modified":"2025-05-06T10:10:14","modified_gmt":"2025-05-06T02:10:14","slug":"mysql%e8%a7%86%e5%9b%be%e7%9a%84%e5%ae%9a%e4%b9%89%e5%92%8c%e5%ba%94%e7%94%a8%e5%85%a8%e9%9d%a2%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200045\/","title":{"rendered":"MySQL\u89c6\u56fe\u7684\u5b9a\u4e49\u548c\u5e94\u7528\u5168\u9762\u89e3\u6790"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>MySQL\u89c6\u56fe\u7684\u5b9a\u4e49\u548c\u5e94\u7528\u5168\u9762\u89e3\u6790<\/h1>\n<p>\u5bf9\u4e8e\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0c\u4e3b\u673a\u5b9d\u8d1d\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aMySQL\u89c6\u56fe\u7684\u5b9a\u4e49\u548c\u5e94\u7528\u5168\u9762\u89e3\u6790\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n<h1>MySQL\u89c6\u56fe\u7684\u5b9a\u4e49\u4e0e\u7528\u9014\u8be6\u89e3<\/h1>\n<h2>\u4ec0\u4e48\u662fMySQL\u89c6\u56fe\uff1f<\/h2>\n<p>MySQL\u89c6\u56fe\u662f\u4e00\u79cd\u865a\u62df\u7684\u8868\uff0c\u5b83\u662f\u6839\u636eSQL\u67e5\u8be2\u8bed\u53e5\u5f97\u5230\u7684\u7ed3\u679c\u96c6\u6309\u7167\u67d0\u79cd\u89c4\u5219\u7ec4\u7ec7\u5728\u4e00\u8d77\u7684\u6570\u636e\u8868\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a\u53ef\u88ab\u67e5\u8be2\u7684\u7ed3\u6784\u5316\u89c6\u56fe\uff0c\u65b9\u4fbf\u7528\u6237\u6839\u636e\u81ea\u5df1\u7684\u9700\u6c42\u6765\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<h2>MySQL\u89c6\u56fe\u7684\u5b9a\u4e49<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5b9a\u4e49\u4e00\u4e2a\u89c6\u56fe\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>CREATE VIEW view_name AS\nSELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/pre>\n<ul>\n<li><code>view_name<\/code>\uff1a\u89c6\u56fe\u7684\u540d\u79f0<\/li>\n<li><code>column1, column2, ...<\/code>\uff1a\u89c6\u56fe\u4e2d\u5305\u542b\u7684\u5217<\/li>\n<li><code>table_name<\/code>\uff1a\u539f\u59cb\u6570\u636e\u8868\u7684\u540d\u79f0<\/li>\n<li><code>condition<\/code>\uff1a\u7b5b\u9009\u6761\u4ef6<\/li>\n<\/ul>\n<h2>MySQL\u89c6\u56fe\u7684\u7528\u9014<\/h2>\n<h3>1. \u6570\u636e\u5b89\u5168\u6027<\/h3>\n<p>\u901a\u8fc7\u89c6\u56fe\uff0c\u53ef\u4ee5\u9690\u85cf\u539f\u59cb\u6570\u636e\u8868\u7684\u90e8\u5206\u5217\u6216\u654f\u611f\u6570\u636e\uff0c\u53ea\u5411\u7528\u6237\u66b4\u9732\u5fc5\u8981\u7684\u4fe1\u606f\uff0c\u4ece\u800c\u63d0\u9ad8\u6570\u636e\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h3>2. \u7b80\u5316\u67e5\u8be2\u64cd\u4f5c<\/h3>\n<p>\u89c6\u56fe\u53ef\u4ee5\u5c06\u6307\u5b9a\u7684\u6570\u636e\u8868\u8fde\u63a5\u3001\u8fc7\u6ee4\u3001\u6c47\u603b\u7b49\u64cd\u4f5c\u5c01\u88c5\u5728\u4e00\u4e2a\u89c6\u56fe\u4e2d\uff0c\u7528\u6237\u53ea\u9700\u5bf9\u89c6\u56fe\u8fdb\u884c\u67e5\u8be2\u64cd\u4f5c\uff0c\u800c\u4e0d\u9700\u8981\u5173\u6ce8\u5e95\u5c42\u8868\u7684\u590d\u6742\u6027\u3002<\/p>\n<h3>3. \u91cd\u7528SQL\u67e5\u8be2<\/h3>\n<p>\u901a\u8fc7\u521b\u5efa\u89c6\u56fe\uff0c\u53ef\u4ee5\u5c06\u590d\u6742\u7684SQL\u67e5\u8be2\u903b\u8f91\u5c01\u88c5\u5728\u89c6\u56fe\u4e2d\uff0c\u65b9\u4fbf\u65e5\u540e\u91cd\u590d\u4f7f\u7528\uff0c\u63d0\u9ad8SQL\u67e5\u8be2\u7684\u590d\u7528\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<h3>4. \u63d0\u9ad8\u6027\u80fd<\/h3>\n<p>MySQL\u89c6\u56fe\u53ef\u4ee5\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\uff0c\u964d\u4f4e\u91cd\u590d\u67e5\u8be2\u7684\u6210\u672c\uff0c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/p>\n<h2>MySQL\u89c6\u56fe\u7684\u793a\u4f8b<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5b66\u751f\u8868<code>students<\/code>\uff0c\u5b57\u6bb5\u5305\u62ec<code>id<\/code>\u3001<code>name<\/code>\u3001<code>age<\/code>\u548c<code>score<\/code>\uff0c\u4e0b\u9762\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684\u89c6\u56fe\uff0c\u7edf\u8ba1\u6bcf\u4e2a\u5e74\u9f84\u6bb5\u7684\u5b66\u751f\u4eba\u6570\uff1a<\/p>\n<pre>CREATE VIEW students_count_by_age AS\nSELECT age, COUNT(*) AS total_students\nFROM students\nGROUP BY age;<\/pre>\n<p>\u901a\u8fc7\u4e0a\u8ff0\u89c6\u56fe\uff0c\u6211\u4eec\u53ef\u4ee5\u76f4\u63a5\u67e5\u8be2\u6bcf\u4e2a\u5e74\u9f84\u6bb5\u7684\u5b66\u751f\u4eba\u6570\uff0c\u65e0\u9700\u6bcf\u6b21\u7f16\u5199\u590d\u6742\u7684\u7edf\u8ba1\u67e5\u8be2\u8bed\u53e5\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8eMySQL\u89c6\u56fe\u7684\u5b9a\u4e49\u4e0e\u7528\u9014\u8be6\u89e3\uff0c\u901a\u8fc7\u89c6\u56fe\u7684\u521b\u5efa\u548c\u5e94\u7528\uff0c\u80fd\u591f\u66f4\u9ad8\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8be2\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300aMySQL\u89c6\u56fe\u7684\u5b9a\u4e49\u548c\u5e94\u7528\u5168\u9762\u89e3\u6790\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6570\u636e\u5e93\u77e5\u8bc6\uff01<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u89c6\u56fe\u7684\u5b9a\u4e49\u548c\u5e94\u7528\u5168\u9762\u89e3&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200045","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200045","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200045"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200045\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}