{"id":76194,"date":"2024-10-16T04:38:14","date_gmt":"2024-10-15T20:38:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76194\/"},"modified":"2024-10-16T04:38:14","modified_gmt":"2024-10-15T20:38:14","slug":"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8as%e9%97%9c%e9%8d%b5%e5%ad%97%e4%bb%a5%e5%88%a5%e5%90%8d%e9%87%8d%e5%91%bd%e5%90%8d%e5%88%97%e6%88%96%e8%a1%a8%e3%80%82","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76194\/","title":{"rendered":"MySQL\u5165\u9580\uff1a\u4f7f\u7528AS\u95dc\u9375\u5b57\u4ee5\u5225\u540d\u91cd\u547d\u540d\u5217\u6216\u8868\u3002"},"content":{"rendered":"<h1 id=\"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8as%e9%97%9c%e9%8d%b5%e5%ad%97%e4%bb%a5%e5%88%a5%e5%90%8d%e9%87%8d%e5%91%bd%e5%90%8d%e5%88%97%e6%88%96%e8%a1%a8-qSAEWUDmDA\">MySQL\u5165\u9580\uff1a\u4f7f\u7528AS\u95dc\u9375\u5b57\u4ee5\u5225\u540d\u91cd\u547d\u540d\u5217\u6216\u8868<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u7684\u9748\u6d3b\u6027\u548c\u9ad8\u6548\u6027\u4f7f\u5176\u6210\u70ba\u8a31\u591a\u61c9\u7528\u7a0b\u5e8f\u7684\u9996\u9078\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528AS\u95dc\u9375\u5b57\u70ba\u5217\u6216\u8868\u5275\u5efa\u5225\u540d\uff0c\u9019\u5728\u67e5\u8a62\u6578\u64da\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%88%a5%e5%90%8d%ef%bc%9f-qSAEWUDmDA\">\u4ec0\u9ebc\u662f\u5225\u540d\uff1f<\/h2>\n<p>\u5728SQL\u67e5\u8a62\u4e2d\uff0c\u5225\u540d\u662f\u4e00\u7a2e\u81e8\u6642\u540d\u7a31\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u7684\u53ef\u8b80\u6027\u6216\u7c21\u5316\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4f7f\u7528\u5225\u540d\u53ef\u4ee5\u4f7f\u67e5\u8a62\u7d50\u679c\u66f4\u6613\u65bc\u7406\u89e3\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u8868\u6216\u8a08\u7b97\u5b57\u6bb5\u6642\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8as%e9%97%9c%e9%8d%b5%e5%ad%97%e9%87%8d%e5%91%bd%e5%90%8d%e5%88%97-qSAEWUDmDA\">\u4f7f\u7528AS\u95dc\u9375\u5b57\u91cd\u547d\u540d\u5217<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528AS\u95dc\u9375\u5b57\u53ef\u4ee5\u70ba\u67e5\u8a62\u7d50\u679c\u4e2d\u7684\u5217\u5275\u5efa\u5225\u540d\u3002\u9019\u6a23\u505a\u7684\u597d\u8655\u662f\u53ef\u4ee5\u4f7f\u7d50\u679c\u96c6\u4e2d\u7684\u5217\u540d\u66f4\u5177\u63cf\u8ff0\u6027\uff0c\u5f9e\u800c\u63d0\u9ad8\u53ef\u8b80\u6027\u3002<\/p>\n<h3 id=\"%e8%aa%9e%e6%b3%95-qSAEWUDmDA\">\u8a9e\u6cd5<\/h3>\n<pre><code>SELECT column_name AS alias_name\nFROM table_name;<\/code><\/pre>\n<h3 id=\"%e7%af%84%e4%be%8b-qSAEWUDmDA\">\u7bc4\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<strong>employees<\/strong>\u7684\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<strong>first_name<\/strong>\u3001<strong>last_name<\/strong>\u548c<strong>salary<\/strong>\u3002\u5982\u679c\u6211\u5011\u60f3\u8981\u67e5\u8a62\u54e1\u5de5\u7684\u5168\u540d\u548c\u85aa\u6c34\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT first_name AS \u540d\u5b57, last_name AS \u59d3\u6c0f, salary AS \u85aa\u6c34\nFROM employees;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u67e5\u8a62\u7d50\u679c\u4e2d\u7684\u5217\u540d\u5c07\u986f\u793a\u70ba\u201c\u540d\u5b57\u201d\u3001\u201c\u59d3\u6c0f\u201d\u548c\u201c\u85aa\u6c34\u201d\uff0c\u800c\u4e0d\u662f\u539f\u59cb\u7684\u5217\u540d\uff0c\u9019\u6a23\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8as%e9%97%9c%e9%8d%b5%e5%ad%97%e9%87%8d%e5%91%bd%e5%90%8d%e8%a1%a8-qSAEWUDmDA\">\u4f7f\u7528AS\u95dc\u9375\u5b57\u91cd\u547d\u540d\u8868<\/h2>\n<p>\u9664\u4e86\u70ba\u5217\u5275\u5efa\u5225\u540d\u5916\uff0cAS\u95dc\u9375\u5b57\u9084\u53ef\u4ee5\u7528\u65bc\u70ba\u8868\u5275\u5efa\u5225\u540d\u3002\u9019\u5728\u9032\u884c\u591a\u8868\u806f\u63a5\u6642\u7279\u5225\u6709\u7528\uff0c\u53ef\u4ee5\u7c21\u5316\u67e5\u8a62\u4e26\u63d0\u9ad8\u53ef\u8b80\u6027\u3002<\/p>\n<h3 id=\"%e8%aa%9e%e6%b3%95-qSAEWUDmDA\">\u8a9e\u6cd5<\/h3>\n<pre><code>SELECT column_name\nFROM table_name AS alias_name;<\/code><\/pre>\n<h3 id=\"%e7%af%84%e4%be%8b-qSAEWUDmDA\">\u7bc4\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<strong>employees<\/strong>\u548c<strong>departments<\/strong>\uff0c\u6211\u5011\u60f3\u8981\u67e5\u8a62\u6bcf\u4f4d\u54e1\u5de5\u53ca\u5176\u6240\u5c6c\u90e8\u9580\u7684\u540d\u7a31\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT e.first_name AS \u540d\u5b57, e.last_name AS \u59d3\u6c0f, d.department_name AS \u90e8\u9580\nFROM employees AS e\nJOIN departments AS d ON e.department_id = d.id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u70ba<strong>employees<\/strong>\u8868\u5275\u5efa\u4e86\u5225\u540d<strong>e<\/strong>\uff0c\u70ba<strong>departments<\/strong>\u8868\u5275\u5efa\u4e86\u5225\u540d<strong>d<\/strong>\u3002\u9019\u6a23\u53ef\u4ee5\u4f7f\u67e5\u8a62\u66f4\u7c21\u6f54\uff0c\u4e26\u4e14\u5728\u4f7f\u7528\u591a\u500b\u8868\u6642\u66f4\u5bb9\u6613\u8b58\u5225\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-qSAEWUDmDA\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5225\u540d\u662f\u81e8\u6642\u7684\uff0c\u53ea\u5728\u67e5\u8a62\u7684\u4e0a\u4e0b\u6587\u4e2d\u6709\u6548\u3002<\/li>\n<li>\u4f7f\u7528AS\u95dc\u9375\u5b57\u662f\u53ef\u9078\u7684\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u7a7a\u683c\u4f86\u5275\u5efa\u5225\u540d\uff0c\u4f8b\u5982\uff1a<code>SELECT column_name alias_name<\/code>\u3002<\/li>\n<li>\u5728\u4f7f\u7528\u5225\u540d\u6642\uff0c\u907f\u514d\u4f7f\u7528\u7a7a\u683c\u6216\u7279\u6b8a\u5b57\u7b26\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6f5b\u5728\u7684\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qSAEWUDmDA\">\u7e3d\u7d50<\/h2>\n<p>\u4f7f\u7528AS\u95dc\u9375\u5b57\u70ba\u5217\u6216\u8868\u5275\u5efa\u5225\u540d\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u6280\u5de7\uff0c\u53ef\u4ee5\u63d0\u9ad8SQL\u67e5\u8a62\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002\u7121\u8ad6\u662f\u5728\u55ae\u8868\u67e5\u8a62\u9084\u662f\u591a\u8868\u806f\u63a5\u4e2d\uff0c\u5408\u7406\u4f7f\u7528\u5225\u540d\u90fd\u80fd\u4f7f\u67e5\u8a62\u7d50\u679c\u66f4\u52a0\u6e05\u6670\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u9019\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u6280\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728MySQL\u4e2d\u4f7f\u7528AS\u95dc\u9375\u5b57\u70ba\u5217\u6216\u8868\u91cd\u547d\u540d\u5225\u540d\uff0c\u7c21\u5316\u67e5\u8a62\u4e26\u63d0\u9ad8\u53ef\u8b80\u6027\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-76194","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76194","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=76194"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76194\/revisions"}],"predecessor-version":[{"id":76195,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76194\/revisions\/76195"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}