{"id":6402,"date":"2024-11-14T12:47:38","date_gmt":"2024-11-14T04:47:38","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6402\/"},"modified":"2024-11-14T12:47:38","modified_gmt":"2024-11-14T04:47:38","slug":"mysql%e6%9f%a5%e7%9c%8b%e5%bd%93%e5%89%8d%e6%95%b0%e6%8d%ae%e5%ba%93","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6402\/","title":{"rendered":"mysql\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93"},"content":{"rendered":"<blockquote><p>\n  \u8981\u67e5\u770b mysql \u5f53\u524d\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u65b9\u6cd5\uff1a1. \u4f7f\u7528 database() \u51fd\u6570\u8fd4\u56de\u5f53\u524d\u6570\u636e\u5e93\u7684\u540d\u79f0\u30022. \u4f7f\u7528 show databases \u8bed\u53e5\u663e\u793a\u6240\u6709\u53ef\u7528\u6570\u636e\u5e93\uff0c\u5f53\u524d\u6570\u636e\u5e93\u4f1a\u4ee5\u661f\u53f7 (*) \u6807\u8bb0\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202408\/01\/2024080121312279839.jpg\" class=\"aligncenter\" title=\"mysql\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93\u63d2\u56fe\" alt=\"mysql\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u67e5\u770b MySQL \u5f53\u524d\u6570\u636e\u5e93\uff1f<\/strong><\/p>\n<p>\u901a\u5e38\uff0cMySQL \u4f7f\u7528\u7279\u5b9a\u6570\u636e\u5e93\uff0c\u79f0\u4e3a\u201c\u6d3b\u52a8\u6570\u636e\u5e93\u201d\u6216\u201c\u5f53\u524d\u6570\u636e\u5e93\u201d\u3002\u8981\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>\u65b9\u6cd5 1\uff1a\u4f7f\u7528 DATABASE() \u51fd\u6570<\/strong><\/p>\n<p>DATABASE() \u51fd\u6570\u8fd4\u56de\u5f53\u524d\u6570\u636e\u5e93\u7684\u540d\u79f0\u3002<\/p>\n<pre>SELECT DATABASE();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u65b9\u6cd5 2\uff1a\u4f7f\u7528 SHOW DATABASES<\/strong><\/p>\n<p>SHOW DATABASES \u8bed\u53e5\u663e\u793a\u6240\u6709\u53ef\u7528\u6570\u636e\u5e93\uff0c\u5176\u4e2d\u4e00\u4e2a\u4ee5\u661f\u53f7 (*) \u6807\u8bb0\u4e3a\u5f53\u524d\u6570\u636e\u5e93\u3002<\/p>\n<pre>SHOW DATABASES;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u7ed3\u679c\u89e3\u91ca<\/strong><\/p>\n<p>\u4ee5\u4e0a\u65b9\u6cd5\u8fd4\u56de\u7c7b\u4f3c\u4e8e\u4ee5\u4e0b\u683c\u5f0f\u7684\u7ed3\u679c\uff1a<\/p>\n<pre>information_schema*<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u661f\u53f7 (*) \u6307\u793a\u5f53\u524d\u6570\u636e\u5e93\u4e3a information_schema\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8981\u67e5\u770b mysql \u5f53\u524d\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u65b9\u6cd5\uff1a1. \u4f7f\u7528 database() \u51fd\u6570\u8fd4\u56de\u5f53\u524d\u6570\u636e\u5e93\u7684\u540d\u79f0\u30022. \u4f7f\u7528 show databases \u8bed\u53e5\u663e\u793a\u6240\u6709\u53ef\u7528\u6570\u636e\u5e93\uff0c\u5f53\u524d\u6570\u636e\u5e93\u4f1a\u4ee5\u661f\u53f7 (*) \u6807\u8bb0\u3002 \u5982\u4f55\u67e5\u770b MySQL \u5f53\u524d\u6570\u636e\u5e93\uff1f \u901a\u5e38\uff0cMySQL \u4f7f\u7528\u7279\u5b9a\u6570\u636e\u5e93\uff0c\u79f0\u4e3a\u201c\u6d3b\u52a8\u6570\u636e\u5e93\u201d\u6216\u201c\u5f53\u524d\u6570\u636e\u5e93\u201d\u3002\u8981\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a \u65b9\u6cd5 1\uff1a\u4f7f\u7528 DATABASE() \u51fd\u6570 DATABASE() \u51fd\u6570\u8fd4\u56de\u5f53\u524d\u6570\u636e\u5e93\u7684\u540d\u79f0\u3002 SELECT DATABASE(); \u767b\u5f55\u540e\u590d\u5236 \u65b9\u6cd5 2\uff1a\u4f7f\u7528 SHOW DATABASES SHOW DATABASES \u8bed\u53e5\u663e\u793a\u6240\u6709\u53ef\u7528\u6570\u636e\u5e93\uff0c\u5176\u4e2d\u4e00\u4e2a\u4ee5\u661f\u53f7 (*) \u6807\u8bb0\u4e3a\u5f53\u524d\u6570\u636e\u5e93\u3002 SHOW DATABASES; \u767b\u5f55\u540e\u590d\u5236 \u7ed3\u679c\u89e3\u91ca \u4ee5\u4e0a\u65b9\u6cd5\u8fd4\u56de\u7c7b\u4f3c\u4e8e\u4ee5\u4e0b\u683c\u5f0f\u7684\u7ed3\u679c\uff1a information_schema* \u767b\u5f55\u540e\u590d\u5236 \u661f\u53f7 (*) \u6307\u793a\u5f53\u524d\u6570\u636e\u5e93\u4e3a information_schema\u3002 \u4ee5\u4e0a\u5c31\u662f\u67e5\u770b\u5f53\u524d\u6570\u636e\u5e93\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-6402","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6402","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=6402"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6402\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}