{"id":74855,"date":"2024-10-15T22:57:22","date_gmt":"2024-10-15T14:57:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/74855\/"},"modified":"2024-10-15T22:57:22","modified_gmt":"2024-10-15T14:57:22","slug":"mysql-show-index%e8%aa%9e%e6%b3%95%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/74855\/","title":{"rendered":"MySQL SHOW INDEX\u8a9e\u6cd5\u7684\u5be6\u969b\u61c9\u7528"},"content":{"rendered":"<h1 id=\"mysql-show-index%e8%aa%9e%e6%b3%95%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-eefJvWLHbm\">MySQL SHOW INDEX\u8a9e\u6cd5\u7684\u5be6\u969b\u61c9\u7528<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u7684\u91cd\u8981\u5de5\u5177\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u5f0f\u4f86\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u4f7f\u7528SHOW INDEX\u8a9e\u6cd5\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSHOW INDEX\u7684\u5be6\u969b\u61c9\u7528\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5229\u7528\u9019\u4e00\u529f\u80fd\u4f86\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afshow-index%ef%bc%9f-eefJvWLHbm\">\u4ec0\u9ebc\u662fSHOW INDEX\uff1f<\/h2>\n<p>SHOW INDEX\u8a9e\u6cd5\u7528\u65bc\u986f\u793a\u6307\u5b9a\u8868\u7684\u7d22\u5f15\u4fe1\u606f\u3002\u9019\u4e9b\u4fe1\u606f\u5305\u62ec\u7d22\u5f15\u7684\u540d\u7a31\u3001\u985e\u578b\u3001\u552f\u4e00\u6027\u3001\u7d22\u5f15\u5217\u7684\u540d\u7a31\u7b49\u3002\u901a\u904e\u9019\u4e9b\u4fe1\u606f\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u4ee5\u8a55\u4f30\u7d22\u5f15\u7684\u6709\u6548\u6027\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h2 id=\"show-index%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-eefJvWLHbm\">SHOW INDEX\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<pre><code>SHOW INDEX FROM table_name;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>table_name<\/code>\u662f\u4f60\u60f3\u8981\u67e5\u8a62\u7684\u8868\u7684\u540d\u7a31\u3002\u57f7\u884c\u9019\u689d\u8a9e\u53e5\u5f8c\uff0cMySQL\u5c07\u8fd4\u56de\u4e00\u500b\u5305\u542b\u7d22\u5f15\u4fe1\u606f\u7684\u7d50\u679c\u96c6\u3002<\/p>\n<h2 id=\"show-index%e7%9a%84%e8%bf%94%e5%9b%9e%e7%b5%90%e6%9e%9c%e8%a7%a3%e9%87%8b-eefJvWLHbm\">SHOW INDEX\u7684\u8fd4\u56de\u7d50\u679c\u89e3\u91cb<\/h2>\n<p>SHOW INDEX\u7684\u8fd4\u56de\u7d50\u679c\u5305\u542b\u4ee5\u4e0b\u5e7e\u500b\u91cd\u8981\u5b57\u6bb5\uff1a<\/p>\n<ul>\n<li><strong>Table<\/strong>: \u8868\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>Non_unique<\/strong>: \u5982\u679c\u7d22\u5f15\u662f\u552f\u4e00\u7684\uff0c\u5247\u70ba0\uff1b\u5426\u5247\u70ba1\u3002<\/li>\n<li><strong>Key_name<\/strong>: \u7d22\u5f15\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>Seq_in_index<\/strong>: \u7d22\u5f15\u4e2d\u5217\u7684\u9806\u5e8f\u3002<\/li>\n<li><strong>Column_name<\/strong>: \u5217\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>Collation<\/strong>: \u5217\u7684\u6392\u5e8f\u65b9\u5f0f\u3002<\/li>\n<li><strong>Cardinality<\/strong>: \u7d22\u5f15\u4e2d\u552f\u4e00\u503c\u7684\u4f30\u8a08\u6578\u91cf\u3002<\/li>\n<li><strong>Sub_part<\/strong>: \u5982\u679c\u7d22\u5f15\u662f\u90e8\u5206\u7d22\u5f15\uff0c\u5247\u986f\u793a\u7d22\u5f15\u7684\u9577\u5ea6\u3002<\/li>\n<li><strong>Packed<\/strong>: \u5982\u679c\u7d22\u5f15\u88ab\u58d3\u7e2e\uff0c\u5247\u986f\u793a\u58d3\u7e2e\u65b9\u5f0f\u3002<\/li>\n<li><strong>Null<\/strong>: \u5217\u662f\u5426\u53ef\u4ee5\u70baNULL\u3002<\/li>\n<li><strong>Index_type<\/strong>: \u7d22\u5f15\u7684\u985e\u578b\uff08\u5982BTREE\u3001FULLTEXT\u7b49\uff09\u3002<\/li>\n<li><strong>Comment<\/strong>: \u7d22\u5f15\u7684\u9644\u52a0\u8aaa\u660e\u3002<\/li>\n<\/ul>\n<h2 id=\"show-index%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e6%a1%88%e4%be%8b-eefJvWLHbm\">SHOW INDEX\u7684\u5be6\u969b\u61c9\u7528\u6848\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528SHOW INDEX\u7684\u5be6\u969b\u6848\u4f8b\uff1a<\/p>\n<pre><code>SHOW INDEX FROM employees;<\/code><\/pre>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\uff0c\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u7372\u5f97\u8a72\u8868\u7684\u6240\u6709\u7d22\u5f15\u4fe1\u606f\u3002\u9019\u4e9b\u4fe1\u606f\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5224\u65b7\u662f\u5426\u9700\u8981\u6dfb\u52a0\u65b0\u7684\u7d22\u5f15\u6216\u522a\u9664\u4e0d\u5fc5\u8981\u7684\u7d22\u5f15\u3002<\/p>\n<h3 id=\"%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-eefJvWLHbm\">\u512a\u5316\u67e5\u8a62\u6027\u80fd<\/h3>\n<p>\u901a\u904e\u5206\u6790SHOW INDEX\u7684\u7d50\u679c\uff0c\u6211\u5011\u53ef\u4ee5\u767c\u73fe\u67d0\u4e9b\u67e5\u8a62\u7684\u6027\u80fd\u74f6\u9838\u3002\u4f8b\u5982\uff0c\u5982\u679c\u67d0\u500b\u67e5\u8a62\u7d93\u5e38\u4f7f\u7528\u67d0\u4e00\u5217\u9032\u884c\u7be9\u9078\uff0c\u4f46\u8a72\u5217\u6c92\u6709\u7d22\u5f15\uff0c\u5247\u53ef\u4ee5\u8003\u616e\u70ba\u8a72\u5217\u6dfb\u52a0\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n<h3 id=\"%e9%81%bf%e5%85%8d%e5%86%97%e9%a4%98%e7%b4%a2%e5%bc%95-eefJvWLHbm\">\u907f\u514d\u5197\u9918\u7d22\u5f15<\/h3>\n<p>SHOW INDEX\u9084\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u8b58\u5225\u5197\u9918\u7d22\u5f15\u3002\u5982\u679c\u767c\u73fe\u6709\u591a\u500b\u7d22\u5f15\u8986\u84cb\u4e86\u76f8\u540c\u7684\u5217\uff0c\u5247\u53ef\u4ee5\u8003\u616e\u522a\u9664\u591a\u9918\u7684\u7d22\u5f15\uff0c\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u548c\u63d0\u9ad8\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-eefJvWLHbm\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u7684SHOW INDEX\u8a9e\u6cd5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u6709\u6548\u5730\u7ba1\u7406\u548c\u512a\u5316\u7d22\u5f15\u3002\u901a\u904e\u5b9a\u671f\u6aa2\u67e5\u7d22\u5f15\u4fe1\u606f\uff0c\u7ba1\u7406\u54e1\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u67e5\u8a62\u6027\u80fd\u4fdd\u6301\u5728\u6700\u4f73\u72c0\u614b\u3002\u7121\u8ad6\u662f\u5728\u958b\u767c\u968e\u6bb5\u9084\u662f\u904b\u884c\u968e\u6bb5\uff0c\u5408\u7406\u5229\u7528SHOW INDEX\u90fd\u80fd\u70ba\u6578\u64da\u5eab\u7684\u6027\u80fd\u63d0\u5347\u5e36\u4f86\u986f\u8457\u7684\u6548\u679c\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u53ca\u5176\u4ed6<code>\u670d\u52a1\u5668<\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL SHOW INDEX\u8a9e\u6cd5\u7684\u5be6\u969b\u61c9\u7528\uff0c\u638c\u63e1\u7d22\u5f15\u7d50\u69cb\u3001\u6027\u80fd\u512a\u5316\u53ca\u67e5\u8a62\u6548\u7387\u63d0\u5347\u7684\u6280\u5de7\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-74855","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74855","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=74855"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74855\/revisions"}],"predecessor-version":[{"id":74856,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74855\/revisions\/74856"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=74855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=74855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=74855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}