{"id":217818,"date":"2023-12-23T00:46:25","date_gmt":"2023-12-22T16:46:25","guid":{"rendered":"https:\/\/www.idc.net\/help\/217818\/"},"modified":"2023-12-23T00:46:25","modified_gmt":"2023-12-22T16:46:25","slug":"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8as%e5%85%b3%e9%94%ae%e5%ad%97%e4%b8%ba%e5%88%97%e6%88%96%e8%a1%a8%e9%87%8d%e5%91%bd%e5%90%8d%e4%b8%ba%e5%88%ab%e5%90%8d","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217818\/","title":{"rendered":"MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528AS\u5173\u952e\u5b57\u4e3a\u5217\u6216\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d"},"content":{"rendered":"<p><title id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8as%e5%85%b3%e9%94%ae%e5%ad%97%e4%b8%ba%e5%88%97%e6%88%96%e8%a1%a8%e9%87%8d%e5%91%bd%e5%90%8d%e4%b8%ba%e5%88%ab%e5%90%8d-wlviQDFaLq\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528AS\u5173\u952e\u5b57\u4e3a\u5217\u6216\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d<\/title><\/p>\n<h1 id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8as%e5%85%b3%e9%94%ae%e5%ad%97%e4%b8%ba%e5%88%97%e6%88%96%e8%a1%a8%e9%87%8d%e5%91%bd%e5%90%8d%e4%b8%ba%e5%88%ab%e5%90%8d-wlviQDFaLq\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528AS\u5173\u952e\u5b57\u4e3a\u5217\u6216\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d<\/h1>\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528AS\u5173\u952e\u5b57\u53ef\u4ee5\u4e3a\u5217\u6216\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d\u3002\u8fd9\u5728\u67e5\u8be2\u8bed\u53e5\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u53ef\u4ee5\u63d0\u9ad8\u53ef\u8bfb\u6027\u548c\u7075\u6d3b\u6027\u3002<\/p>\n<h2 id=\"%e4%b8%ba%e5%88%97%e9%87%8d%e5%91%bd%e5%90%8d-wlviQDFaLq\">\u4e3a\u5217\u91cd\u547d\u540d<\/h2>\n<p>\u5728SELECT\u8bed\u53e5\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528AS\u5173\u952e\u5b57\u4e3a\u5217\u91cd\u547d\u540d\u4e3a\u522b\u540d\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT column_name AS alias_name\nFROM table_name;<\/code><\/pre>\n<p>\u8fd9\u6837\uff0c\u67e5\u8be2\u7ed3\u679c\u4e2d\u7684\u5217\u540d\u5c06\u4f1a\u663e\u793a\u4e3aalias_name\u800c\u4e0d\u662fcolumn_name\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT first_name AS \u59d3, last_name AS \u540d\nFROM customers;<\/code><\/pre>\n<p>\u8fd9\u4e2a\u67e5\u8be2\u5c06\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u59d3\u548c\u540d\u7684\u7ed3\u679c\u96c6\uff0c\u800c\u4e0d\u662ffirst_name\u548clast_name\u3002<\/p>\n<h2 id=\"%e4%b8%ba%e8%a1%a8%e9%87%8d%e5%91%bd%e5%90%8d-wlviQDFaLq\">\u4e3a\u8868\u91cd\u547d\u540d<\/h2>\n<p>\u5728FROM\u5b50\u53e5\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528AS\u5173\u952e\u5b57\u4e3a\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT column_name\nFROM table_name AS alias_name;<\/code><\/pre>\n<p>\u8fd9\u6837\uff0c\u67e5\u8be2\u8bed\u53e5\u4e2d\u7684\u8868\u540d\u5c06\u4f1a\u663e\u793a\u4e3aalias_name\u800c\u4e0d\u662ftable_name\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT orders.order_id, customers.first_name, customers.last_name\nFROM orders\nINNER JOIN customers AS c ON orders.customer_id = c.customer_id;<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u67e5\u8be2\u4e2d\uff0c\u6211\u4eec\u5c06\u8868customers\u91cd\u547d\u540d\u4e3ac\uff0c\u5e76\u4f7f\u7528c\u4f5c\u4e3a\u8868\u7684\u522b\u540d\u3002\u8fd9\u6837\u53ef\u4ee5\u7b80\u5316\u67e5\u8be2\u8bed\u53e5\u5e76\u63d0\u9ad8\u53ef\u8bfb\u6027\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-wlviQDFaLq\">\u603b\u7ed3<\/h2>\n<p>\u4f7f\u7528AS\u5173\u952e\u5b57\u53ef\u4ee5\u4e3a\u5217\u6216\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d\uff0c\u63d0\u9ad8\u67e5\u8be2\u8bed\u53e5\u7684\u53ef\u8bfb\u6027\u548c\u7075\u6d3b\u6027\u3002\u901a\u8fc7\u4e3a\u5217\u548c\u8868\u6307\u5b9a\u522b\u540d\uff0c\u53ef\u4ee5\u4f7f\u67e5\u8be2\u7ed3\u679c\u66f4\u52a0\u6e05\u6670\u660e\u4e86\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u9ad8\u8d28\u91cf\u7684MySQL\u670d\u52a1\u5668\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7b49\u591a\u79cd\u4ea7\u54c1\uff0c\u6ee1\u8db3\u60a8\u7684\u4e0d\u540c\u9700\u6c42\u3002\u60a8\u53ef\u4ee5\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528AS\u5173\u952e\u5b57\u4e3a\u5217\u6216\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528AS\u5173\u952e\u5b57\u4e3a\u5217\u6216\u8868\u91cd\u547d\u540d\u4e3a\u522b\u540d [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217818","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217818","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217818"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217818\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}