{"id":5398,"date":"2024-11-14T10:11:57","date_gmt":"2024-11-14T02:11:57","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5398\/"},"modified":"2024-11-14T10:11:57","modified_gmt":"2024-11-14T02:11:57","slug":"mysql%e7%b4%a2%e5%bc%95%e7%bb%93%e6%9e%84%e6%80%8e%e4%b9%88%e7%94%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5398\/","title":{"rendered":"mysql\u7d22\u5f15\u7ed3\u6784\u600e\u4e48\u7528"},"content":{"rendered":"

\n \u4f7f\u7528 mysql \u7d22\u5f15\u7ed3\u6784\u53ef\u4ee5\u5feb\u901f\u67e5\u627e\u6570\u636e\uff0c\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u7684\u6307\u9488\u6765\u5de5\u4f5c\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff0c\u5982\u4e3b\u952e\u3001\u5916\u952e\u6216\u7ecf\u5e38\u8fdb\u884c\u6bd4\u8f83\u7684\u5217\u3002\u4f7f\u7528 alter table \u8bed\u53e5\u4e3a\u9009\u5b9a\u7684\u5217\u521b\u5efa\u7d22\u5f15\u3002\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528\u7d22\u5f15\u6765\u4f18\u5316\u67e5\u8be2\u3002mysql \u4f7f\u7528\u4e0d\u540c\u7684\u7d22\u5f15\u7ed3\u6784\uff1ab-tree \u7d22\u5f15\uff1a\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u8303\u56f4\u67e5\u8be2\u548c\u7cbe\u786e\u5339\u914d\u67e5\u8be2\u3002\u54c8\u5e0c\u7d22\u5f15\uff1a\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u7b49\u4e8e\u6216\u4e0d\u7b49\u4e8e\u67d0\u4e2a\u503c\u7684\u67e5\u8be2\u3002\u5168\u6587\u7d22\u5f15\uff1a\u7528\u4e8e\u5168\u6587\u641c\u7d22\uff0c\u5141\u8bb8\u7528\u6237\u641c\u7d22\u4e0e\u6a21\u5f0f\u5339\u914d\u7684\u5355\u8bcd\u6216\u77ed\u8bed\u3002\u5728\u9009\u62e9\u7d22\u5f15\u7ed3\u6784\u65f6\uff0c\u8003\u8651\u67e5\u8be2\u7c7b\u578b\u548c\u6570\u636e\u7279\u5f81\uff1a\u8303\u56f4\u67e5\u8be2\u548c\n<\/p><\/blockquote>\n

\"mysql\u7d22\u5f15\u7ed3\u6784\u600e\u4e48\u7528\u63d2\u56fe\"<\/p>\n

\u5982\u4f55\u4f7f\u7528 MySQL \u7d22\u5f15\u7ed3\u6784<\/strong><\/p>\n

\u5728 MySQL \u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u79cd\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u6570\u636e\u7684\u7ed3\u6784\u3002\u5b83\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u7684\u6307\u9488\u6765\u5de5\u4f5c\uff0c\u5141\u8bb8\u6570\u636e\u5e93\u5728\u4e0d\u626b\u63cf\u6574\u4e2a\u8868\u7684\u60c5\u51b5\u4e0b\u68c0\u7d22\u6570\u636e\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong><\/p>\n

    \n
  1. \u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a<\/strong>\u9009\u62e9\u7ecf\u5e38\u7528\u4e8e\u67e5\u8be2\u548c\u8fc7\u6ee4\u6570\u636e\u7684\u5217\uff0c\u4f8b\u5982\u4e3b\u952e\u3001\u5916\u952e\u548c\u7ecf\u5e38\u8fdb\u884c\u6bd4\u8f83\u7684\u5217\u3002<\/li>\n
  2. \u521b\u5efa\u7d22\u5f15\uff1a<\/strong>\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u4e3a\u9009\u5b9a\u7684\u5217\u521b\u5efa\u7d22\u5f15\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/li>\n<\/ol>\n
    ALTER TABLE table_name ADD INDEX index_name (column_name);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \n
    1.  \u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528\u7d22\u5f15\uff0c\u4ee5\u4fbf\u6570\u636e\u5e93\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u4f18\u5316\u67e5\u8be2\u3002\u7d22\u5f15\u53ef\u4ee5\u901a\u8fc7\u5728 WHERE \u5b50\u53e5\u548c JOIN \u64cd\u4f5c\u4e2d\u4f7f\u7528\u6761\u4ef6\u6765\u4f7f\u7528\u3002<\/li>\n<\/ol>\n
      \u7d22\u5f15\u7ed3\u6784\uff1a<\/strong><\/p>\n
      MySQL \u4f7f\u7528\u4e0d\u540c\u7684\u7d22\u5f15\u7ed3\u6784\u6765\u6ee1\u8db3\u4e0d\u540c\u7684\u9700\u6c42\uff1a<\/p>\n
        \n
      •  B-Tree \u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u8303\u56f4\u67e5\u8be2\u548c\u7cbe\u786e\u5339\u914d\u67e5\u8be2\u3002\u5b83\u662f\u4e00\u79cd\u5e73\u8861\u6811\uff0c\u5c06\u6570\u636e\u7ec4\u7ec7\u6210\u591a\u4e2a\u7ea7\u522b\uff0c\u4ee5\u4fbf\u5feb\u901f\u67e5\u627e\u3002<\/li>\n
      •  \u54c8\u5e0c\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u7b49\u4e8e\u6216\u4e0d\u7b49\u4e8e\u67d0\u4e2a\u503c\u7684\u67e5\u8be2\u3002\u5b83\u5c06\u6570\u636e\u5b58\u50a8\u5728\u54c8\u5e0c\u8868\u4e2d\uff0c\u5e76\u4f7f\u7528\u54c8\u5e0c\u7b97\u6cd5\u5c06\u503c\u6620\u5c04\u5230\u5b58\u50a8\u4f4d\u7f6e\u3002<\/li>\n
      •  \u5168\u6587\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u5168\u6587\u641c\u7d22\uff0c\u5141\u8bb8\u7528\u6237\u641c\u7d22\u4e0e\u6a21\u5f0f\u5339\u914d\u7684\u5355\u8bcd\u6216\u77ed\u8bed\u3002\u5b83\u4f7f\u7528\u5012\u6392\u7d22\u5f15\uff0c\u5c06\u5355\u8bcd\u6620\u5c04\u5230\u5305\u542b\u5b83\u4eec\u7684\u6587\u6863\u3002<\/li>\n<\/ul>\n
        \u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7ed3\u6784\uff1a<\/strong><\/p>\n
        \u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7ed3\u6784\u53d6\u51b3\u4e8e\u67e5\u8be2\u7c7b\u578b\u548c\u6570\u636e\u7279\u5f81\uff1a<\/p>\n
          \n
        •  \u8303\u56f4\u67e5\u8be2\u548c\u7cbe\u786e\u5339\u914d\u67e5\u8be2\uff1a<\/strong>B-Tree \u7d22\u5f15<\/li>\n
        •  \u7b49\u4e8e\u6216\u4e0d\u7b49\u4e8e\u67e5\u8be2\uff1a<\/strong>\u54c8\u5e0c\u7d22\u5f15<\/li>\n
        •  \u5168\u6587\u641c\u7d22\uff1a<\/strong>\u5168\u6587\u7d22\u5f15<\/li>\n<\/ul>\n
          \u9644\u52a0\u63d0\u793a\uff1a<\/strong><\/p>\n
            \n
          • \u521b\u5efa\u7d22\u5f15\u65f6\uff0c\u8bf7\u8003\u8651\u6570\u636e\u7684\u57fa\u6570\u548c\u67e5\u8be2\u9891\u7387\u3002<\/li>\n
          • \u907f\u514d\u5728\u5f88\u5c11\u4f7f\u7528\u7684\u5217\u4e0a\u521b\u5efa\u7d22\u5f15\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u589e\u52a0\u8868\u7684\u7ef4\u62a4\u5f00\u9500\u3002<\/li>\n
          • \u5b9a\u671f\u4f7f\u7528 EXPLAIN \u547d\u4ee4\u68c0\u67e5\u67e5\u8be2\u5e76\u786e\u5b9a\u7d22\u5f15\u662f\u5426\u6709\u6548\u3002<\/li>\n
          • \u5982\u679c\u5bf9\u8868\u8fdb\u884c\u9891\u7e41\u7684\u66f4\u6539\uff0c\u8bf7\u4f7f\u7528 InnoDB \u5f15\u64ce\uff0c\u5b83\u652f\u6301\u5e76\u53d1\u7d22\u5f15\u4fee\u6539\u3002<\/li>\n<\/ul>\n
            \u4ee5\u4e0a\u5c31\u662f\u7d22\u5f15\u7ed3\u6784\u600e\u4e48\u7528\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":"
            \u4f7f\u7528 mysql \u7d22\u5f15\u7ed3\u6784\u53ef\u4ee5\u5feb\u901f\u67e5\u627e\u6570\u636e\uff0c\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u7684\u6307\u9488\u6765\u5de5\u4f5c\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a\u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff0c\u5982\u4e3b\u952e\u3001\u5916\u952e\u6216\u7ecf\u5e38\u8fdb\u884c\u6bd4\u8f83\u7684\u5217\u3002\u4f7f\u7528 alter table \u8bed\u53e5\u4e3a\u9009\u5b9a\u7684\u5217\u521b\u5efa\u7d22\u5f15\u3002\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528\u7d22\u5f15\u6765\u4f18\u5316\u67e5\u8be2\u3002mysql \u4f7f\u7528\u4e0d\u540c\u7684\u7d22\u5f15\u7ed3\u6784\uff1ab-tree \u7d22\u5f15\uff1a\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u8303\u56f4\u67e5\u8be2\u548c\u7cbe\u786e\u5339\u914d\u67e5\u8be2\u3002\u54c8\u5e0c\u7d22\u5f15\uff1a\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u7b49\u4e8e\u6216\u4e0d\u7b49\u4e8e\u67d0\u4e2a\u503c\u7684\u67e5\u8be2\u3002\u5168\u6587\u7d22\u5f15\uff1a\u7528\u4e8e\u5168\u6587\u641c\u7d22\uff0c\u5141\u8bb8\u7528\u6237\u641c\u7d22\u4e0e\u6a21\u5f0f\u5339\u914d\u7684\u5355\u8bcd\u6216\u77ed\u8bed\u3002\u5728\u9009\u62e9\u7d22\u5f15\u7ed3\u6784\u65f6\uff0c\u8003\u8651\u67e5\u8be2\u7c7b\u578b\u548c\u6570\u636e\u7279\u5f81\uff1a\u8303\u56f4\u67e5\u8be2\u548c \u5982\u4f55\u4f7f\u7528 MySQL \u7d22\u5f15\u7ed3\u6784 \u5728 MySQL \u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u79cd\u7528\u4e8e\u5feb\u901f\u67e5\u627e\u6570\u636e\u7684\u7ed3\u6784\u3002\u5b83\u901a\u8fc7\u5728\u8868\u4e2d\u521b\u5efa\u6307\u5411\u7279\u5b9a\u5217\u7684\u6307\u9488\u6765\u5de5\u4f5c\uff0c\u5141\u8bb8\u6570\u636e\u5e93\u5728\u4e0d\u626b\u63cf\u6574\u4e2a\u8868\u7684\u60c5\u51b5\u4e0b\u68c0\u7d22\u6570\u636e\u3002 \u5982\u4f55\u4f7f\u7528\u7d22\u5f15\uff1a \u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a\u9009\u62e9\u7ecf\u5e38\u7528\u4e8e\u67e5\u8be2\u548c\u8fc7\u6ee4\u6570\u636e\u7684\u5217\uff0c\u4f8b\u5982\u4e3b\u952e\u3001\u5916\u952e\u548c\u7ecf\u5e38\u8fdb\u884c\u6bd4\u8f83\u7684\u5217\u3002 \u521b\u5efa\u7d22\u5f15\uff1a\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u4e3a\u9009\u5b9a\u7684\u5217\u521b\u5efa\u7d22\u5f15\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a ALTER TABLE table_name ADD INDEX index_name (column_name); 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