{"id":200007,"date":"2025-05-06T10:10:20","date_gmt":"2025-05-06T02:10:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200007\/"},"modified":"2025-05-06T10:10:20","modified_gmt":"2025-05-06T02:10:20","slug":"mysql%e5%89%8d%e7%bc%80%e7%b4%a2%e5%bc%95%e7%9a%84%e7%94%a8%e9%80%94%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200007\/","title":{"rendered":"MySQL\u524d\u7f00\u7d22\u5f15\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

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

MySQL\u524d\u7f00\u7d22\u5f15\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u5bf9\u4e8e\u4e00\u4e2a\u6570\u636e\u5e93\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0c\u4e3b\u673a\u5b9d\u8d1d\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aMySQL\u524d\u7f00\u7d22\u5f15\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

MySQL\u7684\u524d\u7f00\u7d22\u5f15\u6709\u4ec0\u4e48\u4f5c\u7528\uff1f\uff081500\u5b57\uff09<\/h2>\n

\u5bfc\u8a00<\/h3>\n

\u5728MySQL\u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u79cd\u63d0\u9ad8\u6570\u636e\u68c0\u7d22\u6548\u7387\u7684\u91cd\u8981\u6280\u672f\u624b\u6bb5\u3002\u524d\u7f00\u7d22\u5f15\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5b83\u53ef\u4ee5\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u6709\u6548\u5730\u51cf\u5c0f\u7d22\u5f15\u7684\u5927\u5c0f\uff0c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002\u672c\u6587\u5c06\u4ecb\u7ecdMySQL\u7684\u524d\u7f00\u7d22\u5f15\uff0c\u89e3\u91ca\u5176\u4f5c\u7528\uff0c\u5e76\u4e14\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e86\u89e3\u7d22\u5f15<\/h3>\n

\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5feb\u901f\u5b9a\u4f4d\u8868\u4e2d\u7684\u8bb0\u5f55\u3002\u901a\u8fc7\u4f7f\u7528\u7d22\u5f15\uff0c\u53ef\u4ee5\u52a0\u5feb\u6570\u636e\u67e5\u8be2\u7684\u901f\u5ea6\uff0c\u964d\u4f4e\u7cfb\u7edf\u7684\u5f00\u9500\u3002MySQL\u652f\u6301\u591a\u79cd\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5982B-tree\u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u7b49\u3002\u5728\u521b\u5efa\u7d22\u5f15\u65f6\uff0c\u53ef\u4ee5\u8bbe\u5b9a\u7d22\u5f15\u7684\u5b57\u6bb5\uff0c\u4ee5\u63d0\u9ad8\u6570\u636e\u67e5\u8be2\u7684\u6548\u7387\u3002<\/p>\n

\u524d\u7f00\u7d22\u5f15\u7684\u4f5c\u7528<\/h3>\n

\u524d\u7f00\u7d22\u5f15\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5b83\u53ea\u7d22\u5f15\u5b57\u6bb5\u503c\u7684\u524d\u51e0\u4e2a\u5b57\u7b26\u3002\u4e0e\u5b8c\u6574\u7d22\u5f15\u76f8\u6bd4\uff0c\u524d\u7f00\u7d22\u5f15\u53ef\u4ee5\u51cf\u5c0f\u7d22\u5f15\u7684\u5927\u5c0f\uff0c\u4ece\u800c\u964d\u4f4e\u5185\u5b58\u5360\u7528\u548c\u78c1\u76d8\u7a7a\u95f4\u7684\u5f00\u9500\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u67e5\u8be2\u7684\u6027\u80fd\uff0c\u5c24\u5176\u662f\u5bf9\u4e8eVARCHAR\u548cCHAR\u7c7b\u578b\u7684\u5b57\u6bb5\u3002<\/p>\n

\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\u7684\u60c5\u51b5<\/h3>\n
    \n
  1. \u8282\u7701\u7a7a\u95f4\uff1a<\/strong> \u524d\u7f00\u7d22\u5f15\u4ec5\u5b58\u50a8\u5b57\u6bb5\u503c\u7684\u5f00\u5934\u5b57\u7b26\uff0c\u76f8\u6bd4\u5b8c\u6574\u7d22\u5f15\u53ef\u4ee5\u51cf\u5c11\u7d22\u5f15\u7684\u5927\u5c0f\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u8f83\u5927\u957f\u5ea6\u7684\u5b57\u6bb5\u3002<\/li>\n
  2. \u52a0\u5feb\u67e5\u8be2\u901f\u5ea6\uff1a<\/strong> \u5728\u67d0\u4e9b\u67e5\u8be2\u573a\u666f\u4e0b\uff0c\u53ea\u9700\u5bf9\u5b57\u6bb5\u7684\u5f00\u5934\u5b57\u7b26\u8fdb\u884c\u5339\u914d\u5373\u53ef\uff0c\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u67e5\u8be2\u7684\u6548\u7387\u3002<\/li>\n<\/ol>\n

    \u793a\u4f8b\u4ee3\u7801<\/h3>\n

    \u5047\u8bbe\u6709\u4e00\u4e2ausers<\/code>\u8868\uff0c\u5176\u4e2d\u5305\u542busername<\/code>\u5b57\u6bb5\uff0c\u6211\u4eec\u4e3ausername<\/code>\u5b57\u6bb5\u521b\u5efa\u524d\u7f00\u7d22\u5f15\u3002<\/p>\n

    -- \u521b\u5efa\u524d\u7f00\u7d22\u5f15\nALTER TABLE users ADD INDEX username_prefix (username(6));  -- \u8868\u793a\u53ea\u7d22\u5f15\u5b57\u6bb5\u503c\u7684\u524d6\u4e2a\u5b57\u7b26\n\n-- \u67e5\u8be2\u7528\u6237\u540d\u4ee5\"abc\"\u5f00\u5934\u7684\u7528\u6237\nSELECT * FROM users WHERE username LIKE 'abc%';<\/pre>\n
    \u6ce8\u610f\u4e8b\u9879<\/h3>\n
      \n
    1. \u9009\u62e9\u5408\u9002\u7684\u524d\u7f00\u957f\u5ea6\uff1a<\/strong> \u524d\u7f00\u7d22\u5f15\u7684\u4f5c\u7528\u53d6\u51b3\u4e8e\u9009\u62e9\u7684\u524d\u7f00\u957f\u5ea6\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u8c03\u6574\u3002<\/li>\n
    2. \u4e0d\u9002\u7528\u4e8e\u6240\u6709\u573a\u666f\uff1a<\/strong> \u524d\u7f00\u7d22\u5f15\u9002\u7528\u4e8e\u4e00\u4e9b\u7279\u5b9a\u7684\u67e5\u8be2\u573a\u666f\uff0c\u5728\u5176\u4ed6\u60c5\u51b5\u4e0b\u53ef\u80fd\u6ca1\u6709\u592a\u5927\u7684\u4f18\u52bf\uff0c\u9700\u8981\u7efc\u5408\u8003\u8651\u3002<\/li>\n<\/ol>\n
      \u7ed3\u8bed<\/h3>\n
      \u901a\u8fc7\u672c\u6587\u7684\u4ecb\u7ecd\uff0c\u6211\u4eec\u4e86\u89e3\u4e86MySQL\u7684\u524d\u7f00\u7d22\u5f15\u7684\u4f5c\u7528\u4ee5\u53ca\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u662f\u5426\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\uff0c\u4ee5\u63d0\u9ad8\u6570\u636e\u67e5\u8be2\u7684\u6027\u80fd\u3002\u5e0c\u671b\u672c\u6587\u5bf9\u60a8\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n
      \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aMySQL\u524d\u7f00\u7d22\u5f15\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u5427\uff01<\/p>\n
      \n
      \n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
      MySQL\u524d\u7f00\u7d22\u5f15\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f...<\/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-200007","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200007","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=200007"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200007\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}