{"id":79770,"date":"2024-10-16T13:30:17","date_gmt":"2024-10-16T05:30:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79770\/"},"modified":"2024-10-16T13:30:18","modified_gmt":"2024-10-16T05:30:18","slug":"mysql%e6%8c%87%e4%bb%a4-show-indexes%ef%bc%88%e5%b1%95%e7%a4%ba%e7%b4%a2%e5%bc%95%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79770\/","title":{"rendered":"MySQL\u6307\u4ee4: SHOW INDEXES\uff08\u5c55\u793a\u7d22\u5f15\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-show-indexes%ef%bc%88%e5%b1%95%e7%a4%ba%e7%b4%a2%e5%bc%95%ef%bc%89-HEGCqGASdt\">MySQL\u6307\u4ee4: SHOW INDEXES\uff08\u5c55\u793a\u7d22\u5f15\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u500b\u95dc\u9375\u7684\u6982\u5ff5\uff0c\u5b83\u80fd\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u958b\u6e90\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6307\u4ee4\u4f86\u7ba1\u7406\u548c\u67e5\u8a62\u8cc7\u6599\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2d\u7684SHOW INDEXES\u6307\u4ee4\uff0c\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u5982\u4f55\u4f7f\u7528\u9019\u500b\u6307\u4ee4\u4f86\u5c55\u793a\u8cc7\u6599\u8868\u4e2d\u7684\u7d22\u5f15\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b4%a2%e5%bc%95%ef%bc%9f-HEGCqGASdt\">\u4ec0\u9ebc\u662f\u7d22\u5f15\uff1f<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u8cc7\u6599\u7d50\u69cb\uff0c\u65e8\u5728\u52a0\u901f\u8cc7\u6599\u5eab\u67e5\u8a62\u7684\u901f\u5ea6\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u8cc7\u6599\u5eab\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u8cc7\u6599\u3002\u7d22\u5f15\u53ef\u4ee5\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u6b04\u4f4d\u5efa\u7acb\uff0c\u4e26\u4e14\u53ef\u4ee5\u662f\u552f\u4e00\u7684\u6216\u975e\u552f\u4e00\u7684\u3002\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u8cc7\u6599\u6642\u3002<\/p>\n<h2 id=\"show-indexes%e6%8c%87%e4%bb%a4%e6%a6%82%e8%bf%b0-HEGCqGASdt\">SHOW INDEXES\u6307\u4ee4\u6982\u8ff0<\/h2>\n<p>SHOW INDEXES\u6307\u4ee4\u7528\u65bc\u986f\u793a\u6307\u5b9a\u8cc7\u6599\u8868\u4e2d\u7684\u6240\u6709\u7d22\u5f15\u8cc7\u8a0a\u3002\u9019\u4e9b\u8cc7\u8a0a\u5305\u62ec\u7d22\u5f15\u7684\u540d\u7a31\u3001\u985e\u578b\u3001\u6240\u5c6c\u6b04\u4f4d\u3001\u552f\u4e00\u6027\u7b49\u3002\u9019\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u56e0\u70ba\u5b83\u80fd\u5920\u5e6b\u52a9\u4ed6\u5011\u4e86\u89e3\u8cc7\u6599\u8868\u7684\u7d50\u69cb\u548c\u6027\u80fd\u3002<\/p>\n<h3 id=\"%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-HEGCqGASdt\">\u57fa\u672c\u8a9e\u6cd5<\/h3>\n<pre><code>SHOW INDEXES FROM table_name;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>table_name<\/code>\u662f\u4f60\u60f3\u8981\u67e5\u8a62\u7684\u8cc7\u6599\u8868\u540d\u7a31\u3002\u57f7\u884c\u9019\u500b\u6307\u4ee4\u5f8c\uff0cMySQL\u5c07\u8fd4\u56de\u4e00\u500b\u5305\u542b\u7d22\u5f15\u8cc7\u8a0a\u7684\u7d50\u679c\u96c6\u3002<\/p>\n<h2 id=\"show-indexes%e7%9a%84%e8%bf%94%e5%9b%9e%e7%b5%90%e6%9e%9c-HEGCqGASdt\">SHOW INDEXES\u7684\u8fd4\u56de\u7d50\u679c<\/h2>\n<p>\u57f7\u884cSHOW INDEXES\u6307\u4ee4\u5f8c\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u96c6\u5305\u542b\u4ee5\u4e0b\u5e7e\u500b\u91cd\u8981\u6b04\u4f4d\uff1a<\/p>\n<ul>\n<li><strong>Table<\/strong>: \u7d22\u5f15\u6240\u5c6c\u7684\u8cc7\u6599\u8868\u540d\u7a31\u3002<\/li>\n<li><strong>Non_unique<\/strong>: \u5982\u679c\u7d22\u5f15\u662f\u552f\u4e00\u7684\uff0c\u5247\u503c\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>: \u5728\u7d22\u5f15\u4e2d\u7684\u6b04\u4f4d\u5e8f\u865f\u3002<\/li>\n<li><strong>Column_name<\/strong>: \u88ab\u7d22\u5f15\u7684\u6b04\u4f4d\u540d\u7a31\u3002<\/li>\n<li><strong>Collation<\/strong>: \u7d22\u5f15\u7684\u6392\u5e8f\u65b9\u5f0f\u3002<\/li>\n<li><strong>Cardinality<\/strong>: \u7d22\u5f15\u4e2d\u552f\u4e00\u503c\u7684\u4f30\u7b97\u6578\u91cf\u3002<\/li>\n<li><strong>Sub_part<\/strong>: \u5982\u679c\u7d22\u5f15\u662f\u90e8\u5206\u7d22\u5f15\uff0c\u5247\u986f\u793a\u90e8\u5206\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>: \u5982\u679c\u6b04\u4f4d\u53ef\u4ee5\u70baNULL\uff0c\u5247\u986f\u793aYES\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>: \u4efb\u4f55\u9644\u52a0\u7684\u8a3b\u89e3\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b-HEGCqGASdt\">\u7bc4\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8cc7\u6599\u8868\uff0c\u6211\u5011\u60f3\u8981\u67e5\u770b\u8a72\u8cc7\u6599\u8868\u4e2d\u7684\u6240\u6709\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6307\u4ee4\uff1a<\/p>\n<pre><code>SHOW INDEXES FROM employees;<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\uff0c\u5c07\u8fd4\u56de\u985e\u4f3c\u4ee5\u4e0b\u7684\u7d50\u679c\uff1a<\/p>\n<pre><code>+-----------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+\n| Table     | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment |\n+-----------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+\n| employees |          0 | PRIMARY   |            1 | id          | A         |           5 | NULL     | NULL   | NO   | BTREE      |         |\n| employees |          1 | idx_name  |            1 | name        | A         |           5 | NULL     | NULL   | YES  | BTREE      |         |\n+-----------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-HEGCqGASdt\">\u7d50\u8ad6<\/h2>\n<p>SHOW INDEXES\u6307\u4ee4\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u5feb\u901f\u4e86\u89e3\u8cc7\u6599\u8868\u4e2d\u7684\u7d22\u5f15\u7d50\u69cb\u3002\u900f\u904e\u9019\u500b\u6307\u4ee4\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u7372\u5f97\u6709\u95dc\u7d22\u5f15\u7684\u8a73\u7d30\u8cc7\u8a0a\uff0c\u5f9e\u800c\u9032\u884c\u66f4\u6709\u6548\u7684\u8cc7\u6599\u5eab\u512a\u5316\u548c\u67e5\u8a62\u6027\u80fd\u63d0\u5347\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684MySQL\u8cc7\u6599\u5eab\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u7a0b\u5f0f\u63d0\u4f9b\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4SHOW INDEXES\uff0c\u83b7\u53d6\u8868\u4e2d\u7d22\u5f15\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u4f18\u5316\u67e5\u8be2\u6027\u80fd\uff0c\u63d0\u5347\u6570\u636e\u5e93\u6548\u7387\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-79770","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79770","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=79770"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79770\/revisions"}],"predecessor-version":[{"id":79771,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79770\/revisions\/79771"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}