{"id":6007,"date":"2024-11-14T12:16:07","date_gmt":"2024-11-14T04:16:07","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6007\/"},"modified":"2024-11-14T12:16:07","modified_gmt":"2024-11-14T04:16:07","slug":"mysql%e5%a6%82%e4%bd%95%e5%8a%a0%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6007\/","title":{"rendered":"mysql\u5982\u4f55\u52a0\u7d22\u5f15"},"content":{"rendered":"

\u5982\u4f55\u4e3a \u8868\u683c\u6dfb\u52a0\u7d22\u5f15<\/strong><\/p>\n

MySQL \u7d22\u5f15\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002\u5b83\u901a\u8fc7\u5bf9\u6570\u636e\u5217\u8fdb\u884c\u6392\u5e8f\u548c\u5206\u7ec4\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u6570\u636e\u5e93\u5728\u6267\u884c\u67e5\u8be2\u65f6\u9700\u8981\u626b\u63cf\u7684\u884c\u6570\u3002<\/p>\n

\u6dfb\u52a0\u7d22\u5f15\u7684\u6b65\u9aa4\uff1a<\/strong><\/p>\n

    \n
  1. \u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a<\/strong>\u9009\u62e9\u7ecf\u5e38\u7528\u4e8e\u67e5\u8be2\u7684\u5217\uff0c\u5c24\u5176\u662f\u90a3\u4e9b\u7528\u4e8e\u8fc7\u6ee4\u6216\u6392\u5e8f\u6570\u636e\u7684\u5217\u3002<\/li>\n
  2. \u521b\u5efa\u7d22\u5f15\uff1a<\/strong>\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u521b\u5efa\u4e00\u4e2a\u7d22\u5f15\uff1a<\/li>\n<\/ol>\n
    CREATE INDEX [\u7d22\u5f15\u540d\u79f0] ON [\u8868\u540d\u79f0] ([\u5217\u540d\u79f0]);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u4f8b\u5982\uff1a<\/p>\n
    CREATE INDEX idx_last_name ON customers (last_name);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \n
    1.  \u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1a<\/strong>MySQL \u63d0\u4f9b\u4e86\u591a\u79cd\u7d22\u5f15\u7c7b\u578b\uff0c\u5305\u62ec\uff1a<\/li>\n<\/ol>\n
        \n
      •  B-Tree \u7d22\u5f15\uff1a<\/strong>\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u60c5\u51b5\u3002<\/li>\n
      •  \u54c8\u5e0c\u7d22\u5f15\uff1a<\/strong>\u5bf9\u4e8e\u76f8\u7b49\u5339\u914d\u67e5\u8be2\u975e\u5e38\u6709\u6548\u3002<\/li>\n
      •  \u5168\u6587\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u5bf9\u6587\u672c\u6570\u636e\u8fdb\u884c\u5168\u6587\u641c\u7d22\u3002<\/li>\n<\/ul>\n
          \n
        1.  \u6307\u5b9a\u7d22\u5f15\u9009\u9879\uff1a<\/strong>\u60a8\u53ef\u4ee5\u6307\u5b9a\u4ee5\u4e0b\u9009\u9879\u6765\u4f18\u5316\u7d22\u5f15\uff1a<\/li>\n<\/ol>\n
            \n
          •  UNIQUE\uff1a<\/strong>\u786e\u4fdd\u7d22\u5f15\u5217\u4e2d\u7684\u503c\u662f\u552f\u4e00\u7684\u3002<\/li>\n
          •  PRIMARY KEY\uff1a<\/strong>\u5c06\u7d22\u5f15\u6307\u5b9a\u4e3a\u4e3b\u952e\uff0c\u56e0\u4e3a\u5b83\u552f\u4e00\u6807\u8bc6\u8868\u683c\u4e2d\u7684\u6bcf\u884c\u3002<\/li>\n
          •  FULLTEXT\uff1a<\/strong>\u6307\u5b9a\u5168\u6587\u7d22\u5f15\u3002<\/li>\n
          •  USING\uff1a<\/strong>\u6307\u5b9a\u7d22\u5f15\u7c7b\u578b\u3002<\/li>\n<\/ul>\n
            \u4f8b\u5982\uff1a<\/p>\n
            CREATE UNIQUE INDEX idx_email ON users (email);<\/pre>\n
             \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
            \u4f18\u70b9\uff1a<\/strong><\/p>\n
              \n
            • \u63d0\u9ad8\u67e5\u8be2\u6027\u80fd<\/li>\n
            • \u51cf\u5c11\u670d\u52a1\u5668\u8d1f\u8f7d<\/li>\n
            • \u6539\u5584\u6570\u636e\u5b8c\u6574\u6027\uff08\u4f8b\u5982\uff0c\u4f7f\u7528\u552f\u4e00\u7d22\u5f15\u6765\u9632\u6b62\u91cd\u590d\u503c\uff09<\/li>\n<\/ul>\n
              \u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n
                \n
              • \u7d22\u5f15\u4f1a\u6d88\u8017\u5b58\u50a8\u7a7a\u95f4\u3002<\/li>\n
              • \u4fdd\u6301\u7d22\u5f15\u9700\u8981\u989d\u5916\u5f00\u9500\u3002<\/li>\n
              • \u5e94\u8c28\u614e\u4f7f\u7528\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fc7\u591a\u7684\u7d22\u5f15\u4f1a\u964d\u4f4e\u63d2\u5165\u548c\u66f4\u65b0\u64cd\u4f5c\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n
                \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u52a0\u7d22\u5f15\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":"
                \u5982\u4f55\u4e3a \u8868\u683c\u6dfb\u52a0\u7d22\u5f15 MySQL \u7d22\u5f15\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002\u5b83\u901a\u8fc7\u5bf9\u6570\u636e\u5217\u8fdb\u884c\u6392\u5e8f\u548c\u5206\u7ec4\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u6570\u636e\u5e93\u5728\u6267\u884c\u67e5\u8be2\u65f6\u9700\u8981\u626b\u63cf\u7684\u884c\u6570\u3002 \u6dfb\u52a0\u7d22\u5f15\u7684\u6b65\u9aa4\uff1a \u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a\u9009\u62e9\u7ecf\u5e38\u7528\u4e8e\u67e5\u8be2\u7684\u5217\uff0c\u5c24\u5176\u662f\u90a3\u4e9b\u7528\u4e8e\u8fc7\u6ee4\u6216\u6392\u5e8f\u6570\u636e\u7684\u5217\u3002 \u521b\u5efa\u7d22\u5f15\uff1a\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u521b\u5efa\u4e00\u4e2a\u7d22\u5f15\uff1a CREATE INDEX [\u7d22\u5f15\u540d\u79f0] ON [\u8868\u540d\u79f0] ([\u5217\u540d\u79f0]); \u767b\u5f55\u540e\u590d\u5236 \u4f8b\u5982\uff1a CREATE INDEX idx_last_name ON customers (last_name); \u767b\u5f55\u540e\u590d\u5236 \u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1aMySQL \u63d0\u4f9b\u4e86\u591a\u79cd\u7d22\u5f15\u7c7b\u578b\uff0c\u5305\u62ec\uff1a B-Tree \u7d22\u5f15\uff1a\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u60c5\u51b5\u3002 \u54c8\u5e0c\u7d22\u5f15\uff1a\u5bf9\u4e8e\u76f8\u7b49\u5339\u914d\u67e5\u8be2\u975e\u5e38\u6709\u6548\u3002 \u5168\u6587\u7d22\u5f15\uff1a\u7528\u4e8e\u5bf9\u6587\u672c\u6570\u636e\u8fdb\u884c\u5168\u6587\u641c\u7d22\u3002 \u6307\u5b9a\u7d22\u5f15\u9009\u9879\uff1a\u60a8\u53ef\u4ee5\u6307\u5b9a\u4ee5\u4e0b\u9009\u9879\u6765\u4f18\u5316\u7d22\u5f15\uff1a UNIQUE\uff1a\u786e\u4fdd\u7d22\u5f15\u5217\u4e2d\u7684\u503c\u662f\u552f\u4e00\u7684\u3002 PRIMARY KEY\uff1a\u5c06\u7d22\u5f15\u6307\u5b9a\u4e3a\u4e3b\u952e\uff0c\u56e0\u4e3a\u5b83\u552f\u4e00\u6807\u8bc6\u8868\u683c\u4e2d\u7684\u6bcf\u884c\u3002 FULLTEXT\uff1a\u6307\u5b9a\u5168\u6587\u7d22\u5f15\u3002 USING\uff1a\u6307\u5b9a\u7d22\u5f15\u7c7b\u578b\u3002 \u4f8b\u5982\uff1a CREATE UNIQUE INDEX idx_email ON users (email); \u767b\u5f55\u540e\u590d\u5236 \u4f18\u70b9\uff1a \u63d0\u9ad8\u67e5\u8be2\u6027\u80fd \u51cf\u5c11\u670d\u52a1\u5668\u8d1f\u8f7d \u6539\u5584\u6570\u636e\u5b8c\u6574\u6027\uff08\u4f8b\u5982\uff0c\u4f7f\u7528\u552f\u4e00\u7d22\u5f15\u6765\u9632\u6b62\u91cd\u590d\u503c\uff09 \u6ce8\u610f\u4e8b\u9879\uff1a \u7d22\u5f15\u4f1a\u6d88\u8017\u5b58\u50a8\u7a7a\u95f4\u3002 \u4fdd\u6301\u7d22\u5f15\u9700\u8981\u989d\u5916\u5f00\u9500\u3002 \u5e94\u8c28\u614e\u4f7f\u7528\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fc7\u591a\u7684\u7d22\u5f15\u4f1a\u964d\u4f4e\u63d2\u5165\u548c\u66f4\u65b0\u64cd\u4f5c\u7684\u6027\u80fd\u3002 \u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u52a0\u7d22\u5f15\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-6007","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6007","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=6007"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6007\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}