{"id":199615,"date":"2025-05-06T09:34:33","date_gmt":"2025-05-06T01:34:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199615\/"},"modified":"2025-05-06T09:34:33","modified_gmt":"2025-05-06T01:34:33","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8sql%e8%af%ad%e5%8f%a5%e5%9c%a8mysql%e4%b8%ad%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e7%b4%a2%e5%bc%95%e5%92%8c%e4%bc%98%e5%8c%96%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199615\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u7d22\u5f15\u548c\u4f18\u5316\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u7d22\u5f15\u548c\u4f18\u5316\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u7d22\u5f15\u548c\u4f18\u5316\uff1f<\/p>\n

\u5728\u4f7f\u7528MySQL\u6570\u636e\u5e93\u65f6\uff0c\u6570\u636e\u7d22\u5f15\u548c\u4f18\u5316\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9002\u5f53\u5730\u521b\u5efa\u7d22\u5f15\u548c\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6570\u636e\u5e93\u7684\u6027\u80fd\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u7d22\u5f15\u548c\u4f18\u5316\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

    \n
  1. \u521b\u5efa\u7d22\u5f15<\/li>\n<\/ol>\n

    \u7d22\u5f15\u662f\u4e00\u79cd\u7528\u4e8e\u52a0\u5feb\u6570\u636e\u68c0\u7d22\u901f\u5ea6\u7684\u6570\u636e\u7ed3\u6784\u3002\u5728MySQL\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528CREATE INDEX\u8bed\u53e5\u521b\u5efa\u7d22\u5f15\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u521b\u5efa\u7d22\u5f15\u7684\u793a\u4f8b\uff1a<\/p>\n

    CREATE INDEX idx_name ON table_name (column_name);<\/pre>\n
    \u5176\u4e2d\uff0cidx_name\u662f\u7d22\u5f15\u7684\u540d\u79f0\uff0ctable_name\u662f\u8981\u521b\u5efa\u7d22\u5f15\u7684\u8868\u540d\uff0ccolumn_name\u662f\u8981\u521b\u5efa\u7d22\u5f15\u7684\u5217\u540d\u3002<\/p>\n
    \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7d22\u5f15\u5e94\u8be5\u6839\u636e\u5b9e\u9645\u67e5\u8be2\u9700\u6c42\u8fdb\u884c\u521b\u5efa\uff0c\u4e0d\u5b9c\u6ee5\u7528\u3002\u8fc7\u591a\u7684\u7d22\u5f15\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7d22\u5f15\u7ef4\u62a4\u7684\u5f00\u9500\u8fc7\u5927\uff0c\u53cd\u800c\u964d\u4f4e\u4e86\u6570\u636e\u5e93\u6027\u80fd\u3002<\/p>\n
      \n
    1. \u67e5\u8be2\u4f18\u5316<\/li>\n<\/ol>\n
      \u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u67e5\u8be2\u7684\u6548\u7387\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u67e5\u8be2\u4f18\u5316\u6280\u5de7\uff1a<\/p>\n
      2.1 \u4f7f\u7528\u9002\u5f53\u7684\u7d22\u5f15<\/p>\n
      \u5982\u524d\u6240\u8ff0\uff0c\u7d22\u5f15\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u3002\u4f46\u662f\uff0c\u7d22\u5f15\u5e76\u4e0d\u662f\u8d8a\u591a\u8d8a\u597d\u3002\u9009\u62e9\u9002\u5f53\u7684\u7d22\u5f15\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u901a\u8fc7EXPLAIN\u8bed\u53e5\u6765\u5206\u6790\u67e5\u8be2\u8bed\u53e5\u7684\u6267\u884c\u8ba1\u5212\uff0c\u4ee5\u786e\u5b9a\u662f\u5426\u4f7f\u7528\u4e86\u5408\u9002\u7684\u7d22\u5f15\u3002<\/p>\n
      EXPLAIN SELECT * FROM table_name WHERE column_name = 'value';<\/pre>\n
      \u5176\u4e2d\uff0ctable_name\u662f\u8981\u67e5\u8be2\u7684\u8868\u540d\uff0ccolumn_name\u662f\u8981\u67e5\u8be2\u7684\u5217\u540d\u3002<\/p>\n
      2.2 \u907f\u514d\u4f7f\u7528\u901a\u914d\u7b26\u67e5\u8be2<\/p>\n
      \u901a\u914d\u7b26\u67e5\u8be2\uff0c\u5982 ‘%’ \u6216 ‘_’\uff0c\u4f1a\u5bfc\u81f4\u5168\u8868\u626b\u63cf\uff0c\u6548\u7387\u8f83\u4f4e\u3002\u5982\u679c\u53ef\u80fd\u7684\u8bdd\uff0c\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u901a\u914d\u7b26\u67e5\u8be2\u3002\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\u6216\u5168\u6587\u7d22\u5f15\u6765\u52a0\u901f\u6a21\u7cca\u67e5\u8be2\u3002<\/p>\n
      2.3 \u907f\u514d\u4f7f\u7528SELECT *<\/p>\n
      \u9664\u975e\u5fc5\u8981\uff0c\u5c3d\u91cf\u907f\u514d\u4f7f\u7528SELECT *\u67e5\u8be2\u6240\u6709\u5217\u3002\u53ea\u9009\u53d6\u9700\u8981\u7684\u5217\u53ef\u4ee5\u51cf\u5c11IO\u64cd\u4f5c\uff0c\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002<\/p>\n
      2.4 \u5206\u9875\u67e5\u8be2\u4f18\u5316<\/p>\n
      \u5f53\u9700\u8981\u5206\u9875\u663e\u793a\u67e5\u8be2\u7ed3\u679c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528LIMIT\u8bed\u53e5\u9650\u5236\u8fd4\u56de\u7684\u6570\u636e\u91cf\uff0c\u907f\u514d\u4e00\u6b21\u6027\u8fd4\u56de\u5927\u91cf\u6570\u636e\u3002\u540c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5408\u9002\u7684\u7d22\u5f15\u6765\u4f18\u5316\u5206\u9875\u67e5\u8be2\u3002<\/p>\n
      SELECT * FROM table_name LIMIT offset, count;<\/pre>\n
      \u5176\u4e2d\uff0coffset\u4e3a\u504f\u79fb\u91cf\uff0c\u8868\u793a\u4ece\u7b2c\u51e0\u884c\u5f00\u59cb\u8fd4\u56de\u6570\u636e\uff1bcount\u8868\u793a\u8fd4\u56de\u7684\u884c\u6570\u3002<\/p>\n
      2.5 \u4f7f\u7528JOIN\u67e5\u8be2<\/p>\n
      \u5f53\u9700\u8981\u5173\u8054\u591a\u4e2a\u8868\u67e5\u8be2\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528JOIN\u8bed\u53e5\u4ee3\u66ff\u591a\u6b21\u5355\u8868\u67e5\u8be2\uff0c\u4ee5\u51cf\u5c11\u901a\u4fe1\u5f00\u9500\u548c\u51cf\u5c11\u67e5\u8be2\u6b21\u6570\u3002<\/p>\n
      SELECT * FROM table1 t1 JOIN table2 t2 ON t1.column_name = t2.column_name;<\/pre>\n
      \u5176\u4e2d\uff0ctable1\u548ctable2\u662f\u8981\u67e5\u8be2\u7684\u8868\u540d\uff0ccolumn_name\u662f\u4e24\u4e2a\u8868\u4e4b\u95f4\u7684\u5173\u8054\u5217\u3002<\/p>\n
        \n
      1. \u6570\u636e\u5e93\u4f18\u5316<\/li>\n<\/ol>\n
        \u9664\u4e86\u5bf9\u67e5\u8be2\u8bed\u53e5\u8fdb\u884c\u4f18\u5316\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e9b\u6570\u636e\u5e93\u7ea7\u522b\u7684\u4f18\u5316\u6765\u63d0\u9ad8MySQL\u7684\u6027\u80fd\uff0c\u5982\uff1a<\/p>\n
        3.1 \u8c03\u6574\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n
        MySQL\u7684\u7f13\u51b2\u533a\u5927\u5c0f\u5bf9\u6570\u636e\u5e93\u7684IO\u64cd\u4f5c\u6709\u7740\u91cd\u8981\u7684\u5f71\u54cd\u3002\u53ef\u4ee5\u901a\u8fc7\u8c03\u6574key_buffer_size\u3001innodb_buffer_pool_size\u7b49\u53c2\u6570\u6765\u4f18\u5316\u7f13\u51b2\u533a\u5927\u5c0f\u3002<\/p>\n
        3.2 \u5b9a\u671f\u7ef4\u62a4\u548c\u4f18\u5316\u8868<\/p>\n
        \u5b9a\u671f\u6267\u884cOPTIMIZE TABLE\u3001ANALYZE TABLE\u7b49\u547d\u4ee4\u53ef\u4ee5\u5bf9\u8868\u8fdb\u884c\u7ef4\u62a4\u548c\u4f18\u5316\uff0c\u63d0\u9ad8\u6570\u636e\u5e93\u7684\u6027\u80fd\u3002<\/p>\n
        \u7efc\u4e0a\u6240\u8ff0\uff0c\u7d22\u5f15\u548c\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u662f\u63d0\u9ad8MySQL\u6570\u636e\u5e93\u6027\u80fd\u7684\u5173\u952e\u3002\u5408\u7406\u5730\u521b\u5efa\u7d22\u5f15\u3001\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u4ee5\u53ca\u8fdb\u884c\u6570\u636e\u5e93\u7ea7\u522b\u7684\u4f18\u5316\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u5347\u6570\u636e\u5e93\u7684\u67e5\u8be2\u6548\u7387\u548c\u6574\u4f53\u6027\u80fd\u3002\u5e0c\u671b\u672c\u6587\u7684\u4ecb\u7ecd\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
        \u6587\u4e2d\u5173\u4e8e\u6570\u636e\u7d22\u5f15\u4f7f\u7528,SQL\u7d22\u5f15\u4f18\u5316,MySQL\u6570\u636e\u4f18\u5316\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d\u8fdb\u884c\u6570\u636e\u7d22\u5f15\u548c\u4f18\u5316\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n
        \n
        \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u5982\u4f55\u4f7f\u7528SQL\u8bed\u53e5\u5728MySQL\u4e2d...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199615","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199615","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199615"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199615\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}