{"id":76170,"date":"2024-10-16T04:26:15","date_gmt":"2024-10-15T20:26:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76170\/"},"modified":"2024-10-16T04:26:15","modified_gmt":"2024-10-15T20:26:15","slug":"mysql%e8%ae%93%e4%ba%ba%e5%8f%88%e6%84%9b%e5%8f%88%e6%81%a8%e7%9a%84%e5%a4%9a%e8%a1%a8%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76170\/","title":{"rendered":"MySQL\u8b93\u4eba\u53c8\u611b\u53c8\u6068\u7684\u591a\u8868\u67e5\u8a62"},"content":{"rendered":"<h1 id=\"mysql%e8%ae%93%e4%ba%ba%e5%8f%88%e6%84%9b%e5%8f%88%e6%81%a8%e7%9a%84%e5%a4%9a%e8%a1%a8%e6%9f%a5%e8%a9%a2-sgmZXTiAxm\">MySQL\u8b93\u4eba\u53c8\u611b\u53c8\u6068\u7684\u591a\u8868\u67e5\u8a62<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u6578\u64da\u5eab\uff0c\u56e0\u5176\u9ad8\u6548\u80fd\u548c\u9748\u6d3b\u6027\u800c\u53d7\u5230\u958b\u767c\u8005\u7684\u9752\u775e\u3002\u7136\u800c\uff0c\u7576\u6d89\u53ca\u5230\u591a\u8868\u67e5\u8a62\u6642\uff0cMySQL\u7684\u4f7f\u7528\u8005\u5e38\u5e38\u6703\u611f\u5230\u65e2\u611b\u53c8\u6068\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u7684\u591a\u8868\u67e5\u8a62\u7279\u6027\uff0c\u4e26\u5206\u6790\u5176\u512a\u7f3a\u9ede\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%a4%9a%e8%a1%a8%e6%9f%a5%e8%a9%a2%ef%bc%9f-sgmZXTiAxm\">\u4ec0\u9ebc\u662f\u591a\u8868\u67e5\u8a62\uff1f<\/h2>\n<p>\u591a\u8868\u67e5\u8a62\u662f\u6307\u5728\u4e00\u500bSQL\u67e5\u8a62\u4e2d\u540c\u6642\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u9019\u901a\u5e38\u662f\u901a\u904e\u4f7f\u7528JOIN\u8a9e\u53e5\u4f86\u5be6\u73fe\u7684\u3002MySQL\u652f\u6301\u591a\u7a2eJOIN\u985e\u578b\uff0c\u5305\u62ecINNER JOIN\u3001LEFT JOIN\u3001RIGHT JOIN\u548cFULL OUTER JOIN\u7b49\u3002<\/p>\n<h3 id=\"join%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-sgmZXTiAxm\">JOIN\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684INNER JOIN\u793a\u4f8b\uff0c\u8a72\u67e5\u8a62\u5f9e\u5169\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT users.name, orders.amount\nFROM users\nINNER JOIN orders ON users.id = orders.user_id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u201cusers\u201d\u8868\u548c\u201corders\u201d\u8868\u4e2d\u6aa2\u7d22\u7528\u6236\u540d\u7a31\u548c\u8a02\u55ae\u91d1\u984d\u3002INNER JOIN\u53ea\u8fd4\u56de\u5728\u5169\u500b\u8868\u4e2d\u90fd\u6709\u7684\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e8%a1%a8%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%84%aa%e9%bb%9e-sgmZXTiAxm\">\u591a\u8868\u67e5\u8a62\u7684\u512a\u9ede<\/h2>\n<ul>\n<li><strong>\u6578\u64da\u6574\u5408\uff1a<\/strong>\u591a\u8868\u67e5\u8a62\u5141\u8a31\u7528\u6236\u5f9e\u4e0d\u540c\u7684\u6578\u64da\u6e90\u4e2d\u6574\u5408\u4fe1\u606f\uff0c\u9019\u5c0d\u65bc\u751f\u6210\u5831\u544a\u548c\u5206\u6790\u975e\u5e38\u6709\u7528\u3002<\/li>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u4f7f\u7528JOIN\u8a9e\u53e5\uff0c\u53ef\u4ee5\u6839\u64da\u9700\u8981\u9748\u6d3b\u5730\u9078\u64c7\u6240\u9700\u7684\u6578\u64da\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u66f4\u52a0\u9ad8\u6548\u3002<\/li>\n<li><strong>\u6e1b\u5c11\u6578\u64da\u5197\u9918\uff1a<\/strong>\u901a\u904e\u5c07\u6578\u64da\u5206\u6563\u5230\u591a\u500b\u8868\u4e2d\uff0c\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u5197\u9918\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6574\u9ad4\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a4%9a%e8%a1%a8%e6%9f%a5%e8%a9%a2%e7%9a%84%e7%bc%ba%e9%bb%9e-sgmZXTiAxm\">\u591a\u8868\u67e5\u8a62\u7684\u7f3a\u9ede<\/h2>\n<ul>\n<li><strong>\u6027\u80fd\u554f\u984c\uff1a<\/strong>\u7576\u6d89\u53ca\u5230\u5927\u91cf\u6578\u64da\u6642\uff0c\u591a\u8868\u67e5\u8a62\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u7279\u5225\u662f\u7576\u4f7f\u7528\u4e0d\u7576\u7684JOIN\u985e\u578b\u6642\u3002<\/li>\n<li><strong>\u8907\u96dc\u6027\uff1a<\/strong>\u96a8\u8457\u67e5\u8a62\u7684\u8907\u96dc\u6027\u589e\u52a0\uff0c\u7dad\u8b77\u548c\u8abf\u8a66\u9019\u4e9b\u67e5\u8a62\u8b8a\u5f97\u66f4\u52a0\u56f0\u96e3\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u548c\u4e0d\u4e00\u81f4\u7684\u7d50\u679c\u3002<\/li>\n<li><strong>\u5b78\u7fd2\u66f2\u7dda\uff1a<\/strong>\u5c0d\u65bc\u521d\u5b78\u8005\u4f86\u8aaa\uff0c\u7406\u89e3\u548c\u4f7f\u7528\u591a\u8868\u67e5\u8a62\u53ef\u80fd\u6703\u6709\u4e00\u5b9a\u7684\u5b78\u7fd2\u66f2\u7dda\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u8907\u96dc\u7684\u6578\u64da\u7d50\u69cb\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-sgmZXTiAxm\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u70ba\u4e86\u6709\u6548\u5730\u4f7f\u7528MySQL\u7684\u591a\u8868\u67e5\u8a62\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u9069\u7576\u7684\u7d22\u5f15\uff1a<\/strong>\u78ba\u4fdd\u5728JOIN\u7684\u5217\u4e0a\u4f7f\u7528\u7d22\u5f15\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u7c21\u5316\u67e5\u8a62\uff1a<\/strong>\u76e1\u91cf\u4fdd\u6301\u67e5\u8a62\u7c21\u55ae\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684JOIN\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u53ef\u8b80\u6027\u548c\u6027\u80fd\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u548c\u512a\u5316\uff1a<\/strong>\u5728\u751f\u7522\u74b0\u5883\u4e2d\u4f7f\u7528\u4e4b\u524d\uff0c\u5c0d\u67e5\u8a62\u9032\u884c\u6e2c\u8a66\u548c\u512a\u5316\uff0c\u4ee5\u78ba\u4fdd\u5176\u6027\u80fd\u7b26\u5408\u9810\u671f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-sgmZXTiAxm\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u7684\u591a\u8868\u67e5\u8a62\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5f9e\u591a\u500b\u6578\u64da\u6e90\u4e2d\u63d0\u53d6\u548c\u6574\u5408\u4fe1\u606f\u3002\u7136\u800c\uff0c\u4f7f\u7528\u4e0d\u7576\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u548c\u8907\u96dc\u6027\u589e\u52a0\u3002\u56e0\u6b64\uff0c\u4e86\u89e3\u5176\u512a\u7f3a\u9ede\u4e26\u9075\u5faa\u6700\u4f73\u5be6\u8e10\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u5982<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u591a\u8868\u67e5\u8a62\u7684\u9b45\u529b\u8207\u6311\u6230\uff0c\u63ed\u793a\u5176\u9ad8\u6548\u6027\u8207\u8907\u96dc\u6027\uff0c\u8b93\u4f60\u5c0d\u6578\u64da\u7ba1\u7406\u6709\u66f4\u6df1\u7684\u7406\u89e3\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-76170","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76170","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=76170"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76170\/revisions"}],"predecessor-version":[{"id":76171,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76170\/revisions\/76171"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}