{"id":907,"date":"2025-03-22T14:32:08","date_gmt":"2025-03-22T06:32:08","guid":{"rendered":"https:\/\/eve2333.top\/?p=907"},"modified":"2025-03-22T14:32:09","modified_gmt":"2025-03-22T06:32:09","slug":"mysql%e6%95%b0%e6%8d%ae%e5%ba%93%e5%85%a5%e9%97%a8%e5%88%b0%e5%a4%a7%e8%9b%87%e5%b0%9a%e7%a1%85%e8%b0%b7%e5%ae%8b%e7%ba%a2%e5%ba%b7%e8%80%81%e5%b8%88%e7%ac%94%e8%ae%b0-%e9%ab%98%e7%ba%a7%e7%af%87-pa-8","status":"publish","type":"post","link":"https:\/\/eve2333.top\/?p=907","title":{"rendered":"MySQL\u6570\u636e\u5e93\u5165\u95e8\u5230\u5927\u86c7\u5c1a\u7845\u8c37\u5b8b\u7ea2\u5eb7\u8001\u5e08\u7b14\u8bb0 \u9ad8\u7ea7\u7bc7 part 8"},"content":{"rendered":"\n

 \u7b2c08\u7ae0_\u7d22\u5f15\u7684\u521b\u5efa\u4e0e\u8bbe\u8ba1\u539f\u5219<\/h1>\n\n\n\n

1.1\u7d22\u5f15\u7684\u5206\u7c7b<\/h3>\n\n\n\n

MySQL\u7684\u7d22\u5f15\u5305\u62ec\u666e\u901a\u7d22\u5f15\u3001\u552f\u4e00\u6027\u7d22\u5f15\u3001\u5168\u6587\u7d22\u5f15\u3001\u5355\u5217\u7d22\u5f15\u3001\u591a\u5217\u7d22\u5f15\u5f15\u548c\u7a7a\u95f4\u7d22\u5f15\u7b49\u3002<\/p>\n\n\n\n

    \n
  1. \u00b7\u4ece\u529f\u80fd\u903b\u8f91\u4e0a\u8bf4\uff0c\u7d22\u5f15\u4e3b\u8981\u67094\u79cd\uff0c\u5206\u522b\u662f\u666e\u901a\u7d22\u5f15\u3001\u552f\u4e00\u7d22\u5f15\u3001\u4e3b\u952e\u7d22\u5f15\u3001\u5168\u6587\u7d22\u5f15\u3002<\/li>\n\n\n\n
  2. \u00b7\u6309\u7167\u7269\u7406\u5b9e\u73b0\u65b9\u5f0f\uff0c\u7d22\u5f15\u53ef\u4ee5\u5206\u4e3a2\u79cd\uff1a\u805a\u7c07\u7d22\u5f15\u548c\u975e\u805a\u7c07\u7d22\u5f15\u3002<\/li>\n\n\n\n
  3. \u00b7\u6309\u7167\u4f5c\u7528\u5b57\u6bb5\u4e2a\u6570\u8fdb\u884c\u5212\u5206\uff0c\u5206\u6210\u5355\u5217\u7d22\u5f15\u548c\u8054\u5408\u7d22\u5f15\u3002<\/li>\n<\/ol>\n\n\n\n

    1.\u666e\u901a\u7d22\u5f15
    \u5728\u521b\u5efa\u666e\u901a\u7d22\u5f15\u65f6\uff0c\u4e0d\u9644\u52a0\u4efb\u4f55\u9650\u5236\u6761\u4ef6\uff0c\u53ea\u662f\u7528\u4e8e\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002\u8fd9\u7c7b\u7d22\u5f15\u53ef\u4ee5\u521b\u5efa\u5728\u4efb\u4f55\u6570\u636e\u7c7b\u578b\u4e2d\uff0c\u5176\u503c\u662f\u5426\u552f\u4e00\u548c\u975e\u7a7a\uff0c\u8981\u7531\u5b57\u6bb5\u672c\u8eab\u7684\u5b8c\u6574\u6027\u7ea6\u675f\u6761\u4ef6\u51b3\u5b9a\u3002\u5efa\u7acb\u7d22\u5f15\u4ee5\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u7d22\u5f15\u8fdb\u884c\u67e5\u8be2\u3002\u4f8b\u5982\uff0c\u5728\u8868student\u7684\u5b57\u6bb5name\u4e0a\u5efa\u7acb\u4e00\u4e2a\u666e\u901a\u7d22\u5f15\uff0c\u67e5\u8be2\u8bb0\u5f55\u65f6\u5c31\u53ef\u4ee5\u6839\u636e\u8be5\u7d22\u5f15\u8fdb\u884c\u67e5\u8be2\u3002<\/p>\n\n\n\n

    2.\u552f\u4e00\u6027\u7d20\u5f15
    \u4f7f\u7528UNIQUE\u53c2\u6570\u53ef\u4ee5\u8bbe\u7f6e\u7d22\u5f15\u4e3a\u552f\u4e00\u6027\u7d22\u5f151\uff0c\u5728\u521b\u5efa\u552f\u4e00\u6027\u7d22\u5f15\u65f6\uff0c\u9650\u5236\u8be5\u7d22\u5f15\u7684\u503c\u5fc5\u987b\u662f\u552f\u4e00\u7684\uff0c\u4f46\u5141\u8bb8\u6709\u7a7a\u503c\u3002\u5728\u4e00\u5f20\u6570\u636e\u8868\u91cc\u53ef\u4ee5\u6709\u591a\u4e2a\u552f\u4e00\u7d22\u5f15\u3002
    \u4f8b\u5982\uff0c\u5728\u8868student\u7684\u5b57\u6bb5email\u4e2d\u521b\u5efa\u552f\u4e00\u6027\u7d22\u5f15l\uff0c\u90a3\u4e48\u5b57\u6bb5email\u7684\u503c\u5c31\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u901a\u8fc7\u552f\u4e00\u6027\u7d22\u5f15\uff0c\u53ef\u4ee5\u66f4\u5feb\u901f\u5730\u786e\u5b9a\u67d0\u6761\u8bb0\u5f55\u3002<\/p>\n\n\n\n

    3.\u4e3b\u952e\u7d22\u5f15
    \u4e3b\u952e\u7d22\u5f15\u5c31\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u552f\u4e00\u6027\u7d22\u5f15\uff0c\u5728\u552f\u4e00\u7d22\u5f15\u7684\u57fa\u7840\u4e0a\u589e\u52a0\u4e86\u4e0d\u4e3a\u7a7a\u7684\u7ea6\u675f\uff0c\u4e5f\u5c31\u662fNOTNULL+UNIQUE\uff0c1\u5f20\u8868\u91cc\u6700\u591a\u53ea\u6709\u4e00\u4e2a\u4e3b\u952e\u7d22\u5f15\u3002Why\uff1f\u8fd9\u662f\u7531\u4e3b\u952e\u7d22\u5f15\u7684\u7269\u7406\u5b9e\u73b0\u65b9\u5f0f\u51b3\u5b9a\u7684\uff0c\u56e0\u4e3a\u6570\u636e\u5b58\u50a8\u5728\u6587\u4ef6\u4e2d\u53ea\u80fd\u6309\u7167\u4e00\u79cd\u987a\u5e8f\u8fdb\u884c\u5b58\u50a8\u3002<\/p>\n\n\n\n

    4.\u5355\u5217\u7d22\u5f15
    \u5728\u8868\u4e2d\u7684\u5355\u4e2a\u5b57\u6bb5\u4e0a\u521b\u5efa\u7d22\u5f15\u3002\u5355\u5217\u7d22\u5f15\u53ea\u6839\u636e\u8be5\u5b57\u6bb5\u8fdb\u884c\u7d22\u5f15\u3002\u5355\u5217\u7d22\u5f15\u53ef\u4ee5\u662f\u666e\u901a\u7d22\u5f15\uff0c\u4e5f\u53ef\u4ee5\u662f\u552f\u4e00\u6027\u7d22\u5f15\uff0c\u8fd8\u53ef\u4ee5\u662f\u5168\u6587\u7d22\u5f15\u3002\u53ea\u8981\u4fdd\u8bc1\u8be5\u7d22\u5f15\u53ea\u5bf9\u5e94\u4e00\u4e2a\u5b57\u6bb5\u5373\u53ef\u3002\u4e00\u4e2a\u8868\u53ef\u4ee5\u6709\u591a\u4e2a\u5355\u5217\u7d22\u5f15\u3002<\/p>\n\n\n\n

    5.\u591a\u5217\uff08\u7ec4\u5408\u3001\u8054\u5408\uff09\u7d22\u5f15
    \u591a\u5217\u7d22\u5f15\u662f\u5728\u8868\u7684\u591a\u4e2a\u5b57\u6bb5\u7ec4\u5408\u4e0a\u521b\u5efa\u4e00\u4e2a\u7d22\u5f15\u3002\u8be5\u7d22\u5f15\u6307\u5411\u521b\u5efa\u65f6\u5bf9\u5e94\u7684\u591a\u4e2a\u5b57\u6bb5\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fd9\u51e0\u4e2a\u5b57\u6bb5\u8fdb\u884c\u67e5\u8be2\uff0c\u4f46\u662f\u53ea\u6709\u67e5\u8be2\u6761\u4ef6\u4e2d\u4f7f\u7528\u4e86\u8fd9\u4e9b\u5b57\u6bb5\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bb5\u65f6\u624d\u4f1a\u88ab\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u5728\u8868\u4e2d\u7684\u5b57\u6bb5id\u3001name\u548cgender\u4e0a\u5efa\u7acb\u4e00\u4e2a\u591a\u5217\u7d22\u5f15lidx_Id_name_gender\uff0c\u53ea\u6709\u5728\u67e5\u8be2\u6761\u4ef6\u4e2d\u4f7f\u7528\u4e86\u5b57\u6bb5id\u65f6\u8be5\u7d22\u5f15\u624d\u4f1a\u88ab\u4f7f\u7528\u3002\u4f7f\u7528\u7ec4\u5408\u7d22\u5f15\u65f6\u9075\u5faa\u6700\u5de6\u524d\u7f00\u96c6\u5408\u3002<\/p>\n\n\n\n

    6.\u5168\u6587\u7d22\u5f15
    \u5168\u6587\u7d22\u5f15\uff08\u4e5f\u79f0\u5168\u6587\u68c0\u7d22\uff09\u662f\u76ee\u524d\u641c\u7d22\u5f15\u64ce\u4f7f\u7528\u7684\u4e00\u79cd\u5173\u952e\u6280\u672f\u3002\u5b83\u80fd\u591f\u5229\u7528\u3010\u5206\u8bcd\u6280\u672f\u3011\u7b49\u591a\u79cd\u7b97\u6cd5\u667a\u80fd\u5206\u6790\u51fa\u6587\u672c\u6587\u5b57\u4e2d\u5173\u952e\u8bcd\u7684\u9891\u7387\u548c\u91cd\u8981\u6027\uff0c\u7136\u540e\u6309\u7167\u4e00\u5b9a\u7684\u7b97\u6cd5\u89c4\u5219\u667a\u80fd\u5730\u7b5b\u9009\u51fa\u6211\u4eec\u60f3\u8981\u7684\u641c\u7d22\u7ed3\u679c\u3002\u5168\u6587\u7d22\u5f15\u975e\u5e38\u9002\u5408\u5927\u578b\u6570\u636e\u96c6\uff0c\u5bf9\u4e8e\u5c0f\u7684\u6570\u636e\u96c6\uff0c\u5b83\u7684\u7528\u5904\u6bd4\u8f83\u5c0f\u3002<\/p>\n\n\n\n

    ElasticSearch\u5c31\u662fnb<\/p>\n\n\n\n

    \u4f7f\u7528\u53c2\u6570FULLTEXT<\/strong>\u53ef\u4ee5\u8bbe\u7f6e\u7d22\u5f15\u4e3a\u5168\u6587\u7d22\u5f15\u3002\u5728\u5b9a\u4e49\u7d22\u5f15\u7684\u5217\u4e0a\u652f\u6301\u503c\u7684\u5168\u6587\u67e5\u627e\uff0c\u5141\u8bb8\u5728\u8fd9\u4e9b\u7d22\u5f15\u5217\u4e2d\u63d2\u5165\u91cd\u590d\u503c\u548c\u7a7a\u503c\u3002\u5168\u6587\u7d22\u5f15\u53ea\u80fd\u521b\u5efa\u5728CHAR\u3001VARCHAR\u6216TEXT\u7c7b\u578b\u53ca\u5176\u7cfb\u5217\u7c7b\u578b\u7684\u5b57\u6bb5\u4e0a\uff0c\u67e5\u8be2\u6570\u636e\u91cf\u8f83\u5927\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u5b57\u6bb5\u65f6\uff0c\u4f7f\u7528\u5168\u6587\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u3002\u4f8b\u5982\uff0c\u8868student\u7684\u5b57\u6bb5information\u662fTEXT\u7c7b\u578b<\/strong>\u3002\u8be5\u5b57\u6bb5\u5305\u542b\u4e86\u5f88\u591a\u6587\u5b57\u4fe1\u606f\u3002\u5728\u5b57\u6bb5information\u4e0a\u5efa\u7acb\u5168\u6587\u7d22\u5f15\u540e\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u5b57\u6bb5information\u7684\u901f\u5ea6\u3002<\/p>\n\n\n\n

    \u5168\u6587\u7d22\u5f15\u5178\u578b\u7684\u6709\u4e24\u79cd\u7c7b\u578b\uff1a\u81ea\u7136\u8bed\u8a00\u7684\u5168\u6587\u7d22\u5f15\u548c\u5e03\u5c14\u5168\u6587\u7d22\u5f15\u3002
    \u81ea\u7136\u8bed\u8a00\u641c\u7d22\u5f15\u64ce\u5c06\u8ba1\u7b97\u6bcf\u4e00\u4e2a\u6587\u6863\u5bf9\u8c61\u548c\u67e5\u8be2\u7684\u76f8\u5173\u5ea6\u3002\u8fd9\u91cc\uff0c\u76f8\u5173\u5ea6\u662f\u57fa\u4e8e\u5339\u914d\u7684\u5173\u952e\u8bcd\u7684\u4e2a\u6570\uff0c\u4ee5\u53ca\u5173\u952e\u8bcd\u5728\u6587\u6863\u4e2d\u51fa\u73b0\u7684\u6b21\u6570\u3002\u5728\u6574\u4e2a\u7d22\u5f15\u4e2d\u51fa\u73b0\u6b21\u6570\u8d8a\u5c11\u7684\u8bcd\u8bed\uff0c\u5339\u914d\u65f6\u7684\u76f8\u5173\u5ea6\u5c31\u8d8a\u9ad8\u3002\u76f8\u53cd\uff0c\u975e\u5e38\u5e38\u89c1\u7684\u5355\u8bcd\u5c06\u4e0d\u4f1a\u88ab\u641c\u7d22\uff0c\u5982\u679c\u4e00\u4e2a\u8bcd\u8bed\u7684\u5728\u8d85\u8fc750%\u7684\u8bb0\u5f55\u4e2d\u90fd\u51fa\u73b0\u4e86\uff0c\u90a3\u4e48\u81ea\u7136\u8bed\u8a00\u7684\u641c\u7d22\u5c06\u4e0d\u4f1a\u641c\u7d22\u8fd9\u7c7b\u8bcd\u8bed\u3002<\/p>\n\n\n\n

    MySQL\u6570\u636e\u5e93\u4ece3.23.23\u7248\u5f00\u59cb\u652f\u6301\u5168\u6587\u7d22\u5f15\uff0c\u4f46MySQL5.6.4\u4ee5\u524d\u53ea\u6709Myisam\u652f\u6301\uff0c5.6.4\u7248\u672c\u4ee5\u540einnodb\u624d\u652f\u6301\uff0c\u4f46\u662f\u5b98\u65b9\u7248\u672c\u4e0d\u652f\u6301\u4e2d\u6587\u5206\u8bcd\uff0c\u9700\u8981\u7b2c\u4e09\u65b9\u5206\u8bcd\u63d2\u4ef6\u3002\u57285.7.6\u7248\u672c\uff0cMySQL\u5185\u7f6e\u4e86ngram\u5168\u6587\u89e3\u6790\u5668\uff0c\u7528\u6765\u652f\u6301\u4e9a\u6d32\u8bed\u79cd\u7684\u5206\u8bcd\u3002\u6d4b\u8bd5\u6216\u4f7f\u7528\u5168\u6587\u7d22\u5f15\u65f6\uff0c\u8981\u5148\u770b\u4e00\u4e0b\u81ea\u5df1\u7684MySQL\u7248\u672c\u3001\u5b58\u50a8\u5f15\u64ce\u548c\u6570\u636e\u7c7b\u578b\u662f\u5426\u652f\u6301\u5168\u6587\u7d22\u5f15\u30028.0\u5168\u89e3\u51b3\u4e86<\/strong><\/p>\n\n\n\n

    \u968f\u7740\u5927\u6570\u636e\u65f6\u4ee3\u7684\u5230\u6765\uff0c\u5173\u7cfb\u578b\u6570\u636e\u5e93\u5e94\u5bf9\u5168\u6587\u7d22\u5f15\u7684\u9700\u6c42\u5df2\u529b\u4e0d\u4ece\u5fc3\uff0c\u9010\u6e10\u88absolr \uff0cElasticSearch\u7b49\u4e13\u95e8\u7684\u641c\u7d22\u5f15\u64ce\u6240\u66ff\u4ee3\u3002<\/p>\n\n\n\n

    7.\u8865\u5145\uff1a\u7a7a\u95f4\u7d22\u5f15\u3002\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\uff0c\u8fd9\u7c7b\u7d22\u5f15\u5f88\u5c11\u4f1a\u7528\u5230\u3002<\/p>\n\n\n\n

    \n

    \u5c0f\u7ed3\uff1a\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\u652f\u6301\u7684\u7d22\u5f15\u7c7b\u578b\u4e5f\u4e0d\u4e00\u6837
    InnoDB\uff1a\u652f\u6301B-tree\u3001Full-text\u7b49\u7d22\u5f15\uff0c\u4e0d\u652f\u6301Hash\u7d22\u5f15\uff1b
    MyISAM\uff1a\u652f\u6301B-tree\u3001Full-text\u7b49\u7d22\u5f15\uff0c\u4e0d\u652f\u6301Hash\u7d22\u5f15;
    Memory\uff1a\u652f\u6301B-tree\u3001Hash\u7b49\u7d22\u5f15\uff0c\u4e0d\u652f\u6301Full-text\u7d22\u5f15;
    NDB\uff1a\u652f\u6301Hash\u7d22\u5f15l\uff0c\u4e0d\u652f\u6301B-tree\u3001Full-text\u7b49\u7d22\u5f15;
    Archive\uff1a\u4e0d\u652f\u6301B-tree\u3001Hash\u3001Full-text\u7b49\u7d22\u5f15;<\/p>\n<\/blockquote>\n\n\n\n

      1.2 \u521b\u5efa\u7d22\u5f15<\/h3>\n\n\n\n

    1.\u521b\u5efa\u8868\u7684\u65f6\u5019\u521b\u5efa\u7d22\u5f15<\/h4>\n\n\n\n
    # 01-\u7d22\u5f15\u7684\u521b\u5efa\n\n#\u7b2c1\u79cd\uff1aCREATE TABLE \n\n#\u9690\u5f0f\u7684\u65b9\u5f0f\u521b\u5efa\u7d22\u5f15\u3002\u5728\u58f0\u660e\u6709\u4e3b\u952e\u7ea6\u675f\u3001\u552f\u4e00\u6027\u7ea6\u675f\u3001\u5916\u952e\u7ea6\u675f\u7684\u5b57\u6bb5\u4e0a\uff0c\u4f1a\u81ea\u52a8\u7684\u6dfb\u52a0\u76f8\u5173\u7684\u7d22\u5f15\nCREATE DATABASE dbtest2;\n\nUSE dbtest2;\n\nCREATE TABLE dept(\ndept_id INT PRIMARY KEY AUTO_INCREMENT,\ndept_name VARCHAR(20)\n);\n\nCREATE TABLE emp(\nemp_id INT PRIMARY KEY AUTO_INCREMENT,\nemp_name VARCHAR(20) UNIQUE,\ndept_id INT,\nCONSTRAINT emp_dept_id_fk FOREIGN KEY(dept_id) REFERENCES dept(dept_id)\n);<\/code><\/pre>\n\n\n\n
     \u4f46\u662f\uff0c\u5982\u679c\u663e\u5f0f\u521b\u5efa\u8868\u65f6\u521b\u5efa\u7d22\u5f15\u7684\u8bdd\uff0c\u57fa\u672c\u8bed\u6cd5\u683c\u5f0f\u5982\u4e0b\uff1a
    CREATE TABLE table_name [col_name data_type]
    [UNIQUE | FULLTEXT| SPATIAL] [INDEX \u4e28 KEY] [index_name] (col_name [length]) [ASC| DESC]
    \u00b7UNIQUE\u3001FULLTEXT\u548cSPATIAL\u4e3a\u53ef\u9009\u53c2\u6570\uff0c\u5206\u522b\u8868\u793a\u552f\u4e00\u7d22\u5f15I\u3001\u5168\u6587\u7d22\u5f15\u548c\u7a7a\u95f4\u7d22\u5f15
    \u00b7INDEX\u4e0eKEY\u4e3a\u540c\u4e49\u8bcd\uff0c\u4e24\u8005\u7684\u4f5c\u7528\u76f8\u540c\uff0c\u7528\u6765\u6307\u5b9a\u521b\u5efa\u7d22\u5f15;
    \u00b7index_name\u6307\u5b9a\u7d22\u5f15l\u7684\u540d\u79f0\uff0c\u4e3a\u53ef\u9009\u53c2\u6570\uff0c\u5982\u679c\u4e0d\u6307\u5b9a\uff0c\u90a3\u4e48MySQL\u9ed8\u8ba4col_name\u4e3a\u7d22\u5f15\u540d\uff1b
    \u00b7col_name\u4e3a\u9700\u8981\u521b\u5efa\u7d22\u5f15\u7684\u5b57\u6bb5\u5217\uff0c\u8be5\u5217\u5fc5\u987b\u4ece\u6570\u636e\u8868\u4e2d\u5b9a\u4e49\u7684\u591a\u4e2a\u5217\u4e2d\u9009\u62e9\uff1b
    \u00b7length\u4e3a\u53ef\u9009\u53c2\u6570\uff0c\u8868\u793a\u7d22\u5f15\u7684\u957f\u5ea6\uff0c\u53ea\u6709\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u5b57\u6bb5\u624d\u80fd\u6307\u5b9a\u7d22\u5f15\u957f\u5ea6\uff1b
    \u00b7ASC\u6216DESC\u6307\u5b9a\u5347\u5e8f\u6216\u8005\u964d\u5e8f\u7684\u7d22\u5f15\u503c\u5b58\u50a8\u3002<\/p>\n\n\n\n
    #\u663e\u5f0f\u7684\u65b9\u5f0f\u521b\u5efa\uff1a\n#\u2460 \u521b\u5efa\u666e\u901a\u7684\u7d22\u5f15\nCREATE TABLE book(\nbook_id INT ,\nbook_name VARCHAR(100),\nAUTHORS VARCHAR(100),\ninfo VARCHAR(100) ,\nCOMMENT VARCHAR(100),\nyear_publication YEAR,\n#\u58f0\u660e\u7d22\u5f15\nINDEX idx_bname(book_name)\n);<\/code><\/pre>\n\n\n\n
    #\u901a\u8fc7\u547d\u4ee4\u67e5\u770b\u7d22\u5f15\n#\u65b9\u5f0f1\uff1a\nSHOW CREATE TABLE book;\n\n#\u65b9\u5f0f2\uff1a\nSHOW INDEX FROM book;\n\n#\u6027\u80fd\u5206\u6790\u5de5\u5177\uff1aEXPLAIN\nEXPLAIN SELECT * FROM book WHERE book_name = 'mysql\u9ad8\u7ea7';\n<\/code><\/pre>\n\n\n\n
    #\u2461 \u521b\u5efa\u552f\u4e00\u7d22\u5f15\n# \u58f0\u660e\u6709\u552f\u4e00\u7d22\u5f15\u7684\u5b57\u6bb5\uff0c\u5728\u6dfb\u52a0\u6570\u636e\u65f6\uff0c\u8981\u4fdd\u8bc1\u552f\u4e00\u6027\uff0c\u4f46\u662f\u53ef\u4ee5\u6dfb\u52a0null\nCREATE TABLE book1(\nbook_id INT ,\nbook_name VARCHAR(100),\nAUTHORS VARCHAR(100),\ninfo VARCHAR(100) ,\nCOMMENT VARCHAR(100),\nyear_publication YEAR,\n#\u58f0\u660e\u7d22\u5f15\nUNIQUE INDEX uk_idx_cmt(COMMENT)\n);<\/code><\/pre>\n\n\n\n
    \u54c8\u5409\u4e4b\u7edd\u7c73\uff0c\u65e0\u97f5\u4e4b\u549a\u9e21<\/p>\n\n\n\n
    SHOW INDEX FROM book1;\n\nINSERT INTO book1(book_id,book_name,COMMENT)\nVALUES(1,'Mysql\u9ad8\u7ea7','\u9002\u5408\u6709\u6570\u636e\u5e93\u5f00\u53d1\u7ecf\u9a8c\u7684\u4eba\u5458\u5b66\u4e60');\n\nINSERT INTO book1(book_id,book_name,COMMENT)\nVALUES(2,'Mysql\u9ad8\u7ea7',NULL);\n\nSELECT * FROM book1;\n<\/code><\/pre>\n\n\n\n
    \"\"<\/p>\n\n\n\n
    #\u2462 \u4e3b\u952e\u7d22\u5f15\n#\u901a\u8fc7\u5b9a\u4e49\u4e3b\u952e\u7ea6\u675f\u7684\u65b9\u5f0f\u5b9a\u4e49\u4e3b\u952e\u7d22\u5f15\nCREATE TABLE book2(\nbook_id INT PRIMARY KEY ,\nbook_name VARCHAR(100),\nAUTHORS VARCHAR(100),\ninfo VARCHAR(100) ,\nCOMMENT VARCHAR(100),\nyear_publication YEAR\n);\n\nSHOW INDEX FROM book2;\n\n#\u901a\u8fc7\u5220\u9664\u4e3b\u952e\u7ea6\u675f\u7684\u65b9\u5f0f\u5220\u9664\u4e3b\u952e\u7d22\u5f15\nALTER TABLE book2\nDROP PRIMARY KEY;<\/code><\/pre>\n\n\n\n
    #\u2463 \u521b\u5efa\u5355\u5217\u7d22\u5f15\nCREATE TABLE book3(\nbook_id INT ,\nbook_name VARCHAR(100),\nAUTHORS VARCHAR(100),\ninfo VARCHAR(100) ,\nCOMMENT VARCHAR(100),\nyear_publication YEAR,\n#\u58f0\u660e\u7d22\u5f15\nUNIQUE INDEX idx_bname(book_name)\n);\n\nSHOW INDEX FROM book3;\n\n#\u2464 \u521b\u5efa\u8054\u5408\u7d22\u5f15\nCREATE TABLE book4(\nbook_id INT ,\nbook_name VARCHAR(100),\nAUTHORS VARCHAR(100),\ninfo VARCHAR(100) ,\nCOMMENT VARCHAR(100),\nyear_publication YEAR,\n#\u58f0\u660e\u7d22\u5f15\nINDEX mul_bid_bname_info(book_id,book_name,info)\n);\n\n#\u521b\u5efa\u4e86\u7d22\u5f15\u5c31\u4e00\u5b9a\u4f1a\u751f\u6210B+\u6811\uff0c\u5148\u6392b_id,123\u4f9d\u6b21,\u518d\u5f80\u4e0b\u52061\u4e2a 1\u4e2a 1\u4e2a 1\u4e2a.\nSHOW INDEX FROM book4;<\/code><\/pre>\n\n\n\n
    \"\"<\/p>\n\n\n\n
    \u00a0\"\"\"\"<\/p>\n\n\n\n
     \u4f60\u53d1\u73b0\u628abook_id\u5f04\u6ca1\u4e86,\u8054\u5408\u7d22\u5f15\u5c31\u6ca1\u4e86, \u6574\u4e2a\u7d22\u5f15\u90fd\u662f\u6309b+\u6811\u7d22\u5f15 , \u6700\u5de6\u524d\u7f00\u539f\u5219<\/p>\n\n\n\n
     6.\u521b\u5efa\u5168\u6587\u7d22\u5f15<\/p>\n\n\n\n
    FULLTEXT\u5168\u6587\u7d22\u5f15I\u53ef\u4ee5\u7528\u4e8e\u5168\u6587\u641c\u7d22\uff0c\u5e76\u4e14\u53ea\u4e3aCHAR\u3001VARCHAR\u548cTEXT\u5217\u521b\u5efa\u7d22\u5f15l\u3002\u7d22\u5f15\u603b\u662f\u5bf9\u6574\u4e2a\u5217\u8fdb\u884c\uff0c\u4e0d\u652f\u6301\u5c40\u90e8\uff08\u524d\u7f00\uff09\u7d22\u5f15\u3002<\/p>\n\n\n\n
    #\u2465 \u521b\u5efa\u5168\u6587\u7d22\u5f15\nCREATE TABLE test4(\nid INT NOT NULL,\nNAME CHAR(30) NOT NULL,\nage INT NOT NULL,\ninfo VARCHAR(255),\nFULLTEXT INDEX futxt_idx_info(info(50))\n)\n\nSHOW INDEX FROM test4;\n\n29.15---30.30<\/code><\/pre>\n\n\n\n
    \u4e0d\u540c\u4e8elike\u65b9\u5f0f\u7684\u7684\u67e5\u8be2\uff1a<\/p>\n\n\n\n
    SELECT *FROM papers WHERE content LIKE '%\u67e5\u8be2\u5b57\u7b26\u4e32%';<\/code><\/pre>\n\n\n\n
    \u5168\u6587\u7d22\u5f15\u7528match+against\u65b9\u5f0f\u67e5\u8be2\uff1a<\/p>\n\n\n\n
    SELECT * FROM papers WHERE MATCH(title,content\uff09 AGAINST\uff08'\u67e5\u8be2\u5b57\u7b26\u7533'\uff09;<\/code><\/pre>\n\n\n\n
    \u660e\u663e\u7684\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002
    \u6ce8\u610f\u70b9
    1\uff0e\u4f7f\u7528\u5168\u6587\u7d22\u5f15\u524d\uff0c\u641e\u6e05\u695a\u7248\u672c\u652f\u6301\u60c5\u51b5\uff1b
    2.   \u5168\u6587\u7d22\u5f15\u6bd4like+%\u5febN\u500d\uff0c\u4f46\u662f\u53ef\u80fd\u5b58\u5728\u7cbe\u5ea6\u95ee\u9898\uff1b
    3.   \u5982\u679c\u9700\u8981\u5168\u6587\u7d22\u5f15\u7684\u662f\u5927\u91cf\u6570\u636e\uff0c\u5efa\u8bae\u5148\u6dfb\u52a0\u6570\u636e\uff0c\u518d\u521b\u5efa\u7d22\u5f15\u3002<\/p>\n\n\n\n
     2.\u5728\u5df2\u7ecf\u5b58\u5728\u7684\u8868\u4e0a\u521b\u5efa\u7d22\u5f15<\/h4>\n\n\n\n
    #\u7b2c2\u79cd\uff1a\u8868\u5df2\u7ecf\u521b\u5efa\u6210\u529f\n\n#\u2460 ALTER TABLE ... ADD ...\n\nCREATE TABLE book5(\nbook_id INT ,\nbook_name VARCHAR(100),\nAUTHORS VARCHAR(100),\ninfo VARCHAR(100) ,\nCOMMENT VARCHAR(100),\nyear_publication YEAR\n);\n\nSHOW INDEX FROM book5;\n\nALTER TABLE book5 ADD INDEX idx_cmt(COMMENT);\n\nALTER TABLE book5 ADD UNIQUE uk_idx_bname(book_name);\n\nALTER TABLE book5 ADD INDEX mul_bid_bname_info(book_id,book_name,info);<\/code><\/pre>\n\n\n\n
    <\/p>\n\n\n\n
    \"\"<\/p>\n\n\n\n
    #\u2461 CREATE INDEX ... ON ...\n\nCREATE TABLE book6(\nbook_id INT ,\nbook_name VARCHAR(100),\nAUTHORS VARCHAR(100),\ninfo VARCHAR(100) ,\nCOMMENT VARCHAR(100),\nyear_publication YEAR\n);\n\nSHOW INDEX FROM book6;\n\nCREATE INDEX idx_cmt ON book6(COMMENT);\n\nCREATE UNIQUE INDEX  uk_idx_bname ON book6(book_name);\n\nCREATE INDEX mul_bid_bname_info ON book6(book_id,book_name,info);\n<\/code><\/pre>\n\n\n\n
     P130\u6682\u65f6\u8df3\u4e86<\/p>\n\n\n\n
    3.\u7d22\u5f15\u7684\u8bbe\u8ba1\u539f\u5219<\/h2>\n\n\n\n
    #1. \u6570\u636e\u7684\u51c6\u5907\n\nCREATE DATABASE atguigudb1;\n\nUSE atguigudb1;\n\n#1.\u521b\u5efa\u5b66\u751f\u8868\u548c\u8bfe\u7a0b\u8868\nCREATE TABLE `student_info` (\n `id` INT(11) AUTO_INCREMENT,\n `student_id` INT NOT NULL ,\n `name` VARCHAR(20) DEFAULT NULL,\n `course_id` INT NOT NULL ,\n `class_id` INT(11) DEFAULT NULL,\n `create_time` DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,\n PRIMARY KEY (`id`)\n) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;\n\nCREATE TABLE `course` (\n`id` INT(11) NOT NULL AUTO_INCREMENT,\n`course_id` INT NOT NULL ,\n`course_name` VARCHAR(40) DEFAULT NULL,\nPRIMARY KEY (`id`)\n) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;\n\n#\u51fd\u65701\uff1a\u521b\u5efa\u968f\u673a\u4ea7\u751f\u5b57\u7b26\u4e32\u51fd\u6570\n\nDELIMITER \/\/\nCREATE FUNCTION rand_string(n INT) \n\tRETURNS VARCHAR(255) #\u8be5\u51fd\u6570\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\nBEGIN \n\tDECLARE chars_str VARCHAR(100) DEFAULT 'abcdefghijklmnopqrstuvwxyzABCDEFJHIJKLMNOPQRSTUVWXYZ';\n\tDECLARE return_str VARCHAR(255) DEFAULT '';\n\tDECLARE i INT DEFAULT 0;\n\tWHILE i < n DO \n       SET return_str =CONCAT(return_str,SUBSTRING(chars_str,FLOOR(1+RAND()*52),1));\n       SET i = i + 1;\n    END WHILE;\n    RETURN return_str;\nEND \/\/\nDELIMITER ;\n\n\nSELECT @@log_bin_trust_function_creators;\n\nSET GLOBAL log_bin_trust_function_creators = 1;\n\n\n#\u51fd\u65702\uff1a\u521b\u5efa\u968f\u673a\u6570\u51fd\u6570\nDELIMITER \/\/\nCREATE FUNCTION rand_num (from_num INT ,to_num INT) RETURNS INT(11)\nBEGIN   \nDECLARE i INT DEFAULT 0;  \nSET i = FLOOR(from_num +RAND()*(to_num - from_num+1))   ;\nRETURN i;  \nEND \/\/\nDELIMITER ;<\/code><\/pre>\n\n\n\n
    # \u5b58\u50a8\u8fc7\u7a0b1\uff1a\u521b\u5efa\u63d2\u5165\u8bfe\u7a0b\u8868\u5b58\u50a8\u8fc7\u7a0b\nDELIMITER \/\/\nCREATE PROCEDURE  insert_course( max_num INT )\nBEGIN  \nDECLARE i INT DEFAULT 0;   \n SET autocommit = 0;    #\u8bbe\u7f6e\u624b\u52a8\u63d0\u4ea4\u4e8b\u52a1\n REPEAT  #\u5faa\u73af\n SET i = i + 1;  #\u8d4b\u503c\n INSERT INTO course (course_id, course_name ) VALUES (rand_num(10000,10100),rand_string(6));  \n UNTIL i = max_num  \n END REPEAT;  \n COMMIT;  #\u63d0\u4ea4\u4e8b\u52a1\nEND \/\/\nDELIMITER ;\n\n\n# \u5b58\u50a8\u8fc7\u7a0b2\uff1a\u521b\u5efa\u63d2\u5165\u5b66\u751f\u4fe1\u606f\u8868\u5b58\u50a8\u8fc7\u7a0b\nDELIMITER \/\/\nCREATE PROCEDURE  insert_stu( max_num INT )\nBEGIN  \nDECLARE i INT DEFAULT 0;   \n SET autocommit = 0;    #\u8bbe\u7f6e\u624b\u52a8\u63d0\u4ea4\u4e8b\u52a1\n REPEAT  #\u5faa\u73af\n SET i = i + 1;  #\u8d4b\u503c\n INSERT INTO student_info (course_id, class_id ,student_id ,NAME ) VALUES (rand_num(10000,10100),rand_num(10000,10200),rand_num(1,200000),rand_string(6));  \n UNTIL i = max_num  \n END REPEAT;  \n COMMIT;  #\u63d0\u4ea4\u4e8b\u52a1\nEND \/\/\nDELIMITER ;\n\n#\u8c03\u7528\u5b58\u50a8\u8fc7\u7a0b\uff1a\nCALL insert_course(100);\n\nSELECT COUNT(*) FROM course;\n\nCALL insert_stu(1000000);\n\nSELECT COUNT(*) FROM student_info;<\/code><\/pre>\n\n\n\n
    3.2\u54ea\u4e9b\u60c5\u51b5\u9002\u5408\u521b\u5efa\u7d22\u5f15<\/h3>\n\n\n\n
    1. \u5b57\u6bb5\u7684\u6570\u503c\u6709\u552f\u4e00\u6027\u7684\u9650\u5236<\/h4>\n\n\n\n
    \u7d22\u5f15\u672c\u8eab\u53ef\u4ee5\u8d77\u5230\u7ea6\u675f\u7684\u4f5c\u7528\uff0c\u6bd4\u5982\u552f\u4e00\u7d22\u5f15\u3001\u4e3b\u952e\u7d22\u5f15\u90fd\u662f\u53ef\u4ee5\u8d77\u5230\u552f\u4e00\u6027\u7ea6\u675f\u7684\uff0c\u56e0\u6b64\u5728\u6211\u4eec\u7684\u6570\u636e\u8868\u4e2d\u5982\u679c\u67d0\u4e2a\u5b57\u6bb5\u662f\u552f\u4e00\u6027\u7684\uff0c\u5c31\u53ef\u4ee5\u76f4\u63a5\u521b\u5efa\u552f\u4e00\u6027\u7d22\u5f15\uff0c\u6216\u8005\u4e3b\u952e\u7d22\u5f15\u3002\u8fd9\u6837\u53ef\u4ee5\u66f4\u5feb\u901f\u5730\u901a\u8fc7\u8be5\u7d22\u5f15\u6765\u786e\u5b9a\u67d0\u6761\u8bb0\u5f55\u3002<\/p>\n\n\n\n
    \u4f8b\u5982\uff0c\u5b66\u751f\u8868\u4e2d\u5b66\u53f7\u662f\u5177\u6709\u552f\u4e00\u6027\u7684\u5b57\u6bb5\uff0c\u4e3a\u8be5\u5b57\u6bb5\u5efa\u7acb\u552f\u4e00\u6027\u7d22\u5f15\u53ef\u4ee5\u5f88\u5feb\u786e\u5b9a\u67d0\u4e2a\u5b66\u751f\u7684\u4fe1\u606f\uff0c\u5982\u679c\u4f7f\u7528\u59d3\u540d\u7684\u8bdd\uff0c\u53ef\u80fd\u5b58\u5728\u540c\u540d\u73b0\u8c61\uff0c\u4ece\u800c\u964d\u4f4e\u67e5\u8be2\u901f\u5ea6\u3002<\/p>\n\n\n\n
    \n
    \u4e1a\u52a1\u4e0a\u5177\u6709\u552f\u4e00\u7279\u6027\u7684\u5b57\u6bb5\uff0c\u5373\u4f7f\u662f\u7ec4\u5408\u5b57\u6bb5\uff0c\u4e5f\u5fc5\u987b\u5efa\u6210\u552f\u4e00\u7d22\u5f15\u3002\uff08\u6765\u6e90\uff1aAlibaba\uff09
    \u8bf4\u660e\uff1a\u4e0d\u8981\u4ee5\u4e3a\u552f\u4e00\u7d22\u5f15\u5f71\u54cd\u4e86insert\u901f\u5ea6\uff0c\u8fd9\u4e2a\u901f\u5ea6\u635f\u8017\u53ef\u4ee5\u5ffd\u7565\uff0c\u4f46\u63d0\u9ad8\u67e5\u627e\u901f\u5ea6\u662f\u660e\u663e\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n
    2. \u9891\u7e41\u4f5c\u4e3aWHERE\u67e5\u8be2\u6761\u4ef6\u7684\u5b57\u6bb5 <\/h4>\n\n\n\n
     mysql8.0\u540e\u6ca1\u6709\u7f13\u5b58\u4e86\uff0c\u521b\u5efa\u5b8c\u6bd5show\u4e00\u4e0b\u5373\u53ef<\/p>\n\n\n\n
    #\u2461 \u9891\u7e41\u4f5c\u4e3a WHERE \u67e5\u8be2\u6761\u4ef6\u7684\u5b57\u6bb5\n#\u67e5\u770b\u5f53\u524dstduent_info\u8868\u4e2d\u7684\u7d22\u5f15\nSHOW INDEX FROM student_info;\n#student_id\u5b57\u6bb5\u4e0a\u6ca1\u6709\u7d22\u5f15\u7684\uff1a\nSELECT course_id, class_id, NAME, create_time, student_id \nFROM student_info\nWHERE student_id = 123110; #276ms\n\n#\u7ed9student_id\u5b57\u6bb5\u6dfb\u52a0\u7d22\u5f15\nALTER TABLE student_info\nADD INDEX idx_sid(student_id);\n\n#student_id\u5b57\u6bb5\u4e0a\u6709\u7d22\u5f15\u7684\uff1a\nSELECT course_id, class_id, NAME, create_time, student_id \nFROM student_info\nWHERE student_id = 123110; #43ms<\/code><\/pre>\n\n\n\n
    3.\u7ecf\u5e38GROUPBY\u548cORDERBY\u7684\u5217<\/h4>\n\n\n\n
    \u7d22\u5f15\u5c31\u662f\u8ba9\u6570\u636e\u6309\u7167\u67d0\u79cd\u987a\u5e8f\u8fdb\u884c\u5b58\u50a8\u6216\u68c0\u7d22\uff0c\u56e0\u6b64\u5f53\u6211\u4eec\u4f7f\u7528GROUPBY\u5bf9\u6570\u636e\u8fdb\u884c\u5206\u7ec4\u67e5\u8be2\uff0c\u6216\u8005\u4f7f\u7528ORDER BY\u5bf9\u6570\u636e\u8fdb\u884c\u6392\u5e8f\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u5bf9\u5206\u7ec4\u6216\u8005\u6392\u5e8f\u7684\u5b57\u6bb5\u8fdb\u884c\u7d22\u5f15\u3002\u5982\u679c\u5f85\u6392\u5e8f\u7684\u5217\u6709\u591a\u4e2a\uff0c\u90a3\u4e48\u53ef\u4ee5\u5728\u8fd9\u4e9b\u5217\u4e0a\u5efa\u7acb\u7ec4\u5408\u7d22\u5f15\u3002<\/p>\n\n\n\n
     tts\u7f3a\u5c11<\/p>\n\n\n\n
    5.DISTINCT\u5b57\u6bb5\u9700\u8981\u521b\u5efa\u7d22\u5f15<\/h4>\n\n\n\n
    \u6709\u65f6\u5019\u6211\u4eec\u9700\u8981\u5bf9\u67d0\u4e2a\u5b57\u6bb5\u8fdb\u884c\u53bb\u91cd\uff0c\u4f7f\u7528DISTINCT\uff0c\u90a3\u4e48\u5bf9\u8fd9\u4e2a\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff0c\u4e5f\u4f1a\u63d0\u5347\u67e5\u8be2\u6548\u7387\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u60f3\u8981\u67e5\u8be2\u8bfe\u7a0b\u8868\u4e2d\u4e0d\u540c\u7684student_id\u90fd\u6709\u54ea\u4e9b\uff0c\u5982\u679c\u6211\u4eec\u6ca1\u6709\u5bf9student_id\u521b\u5efa\u7d22\u5f15\uff0c\u6267\u884cSQL\u8bed\u53e5\uff1a<\/p>\n\n\n\n
    SELECT DISTINCT(student_id) FROM *student_info\u2032;<\/code><\/pre>\n\n\n\n
    \u8fd0\u884c\u7ed3\u679c\uff08600637\u6761\u8bb0\u5f55\uff0c\u8fd0\u884c\u65f6\u95f40.683s\uff09\uff1amysq1
    \u5982\u679c\u6211\u4eec\u5bf9student_id\u521b\u5efa\u7d22\u5f15l\uff0c\u518d\u6267\u884cSQL\u8bed\u53e5\uff1a<\/p>\n\n\n\n
    SELECT DISTINCT(student_id) FROM \u2018student_info';<\/code><\/pre>\n\n\n\n
    \u8fd0\u884c\u7ed3\u679c\uff08600637\u6761\u8bb0\u5f55\uff0c\u8fd0\u884c\u65f6\u95f40.010s\uff09\uff1a\u4f60\u80fd\u770b\u5230SQL\u67e5\u8be2\u6548\u7387\u6709\u4e86\u63d0\u5347\uff0c\u540c\u65f6\u663e\u793a\u51fa\u6765\u7684student_id\u8fd8\u662f\u6309\u7167\u9012\u589e\u7684\u987a\u5e8f\u8fdb\u884c\u5c55\u793a\u7684\u3002\u8fd9\u662f\u56e0\u4e3a\u7d22\u5f15\u4f1a\u5bf9\u6570\u636e\u6309\u7167\u67d0\u79cd\u987a\u5e8f\u8fdb\u884c\u6392\u5e8f\uff0c\u6240\u4ee5\u5728\u53bb\u91cd\u7684\u65f6\u5019\u4e5f\u4f1a\u5feb\u5f88\u591a\u3002<\/p>\n\n\n\n
     6.\u591a\u8868JOIN\u8fde\u63a5\u64cd\u4f5c\u65f6\uff0c\u521b\u5efa\u7d22\u5f15\u6ce8\u610f\u4e8b\u9879<\/h4>\n\n\n\n
      \n
    1. \u9996\u5148\uff0c\u8fde\u63a5\u8868\u7684\u6570\u91cf\u5c3d\u91cf\u4e0d\u8981\u8d85\u8fc73\u5f20\uff0c\u56e0\u4e3a\u6bcf\u589e\u52a0\u4e00\u5f20\u8868\u5c31\u76f8\u5f53\u4e8e\u589e\u52a0\u4e86\u4e00\u6b21\u5d4c\u5957\u7684\u5faa\u73af\uff0c\u6570\u91cf\u7ea7\u589e\u957f\u4f1a\u975e\u5e38\u5feb\uff0c\u4e25\u91cd\u5f71\u54cd\u67e5\u8be2\u7684\u6548\u7387\u3002<\/li>\n\n\n\n
    2. \u5176\u6b21\uff0c\u5bf9WHERE\u6761\u4ef6\u521b\u5efa\u7d22\u5f15\uff0c\u56e0\u4e3aWHERE\u624d\u662f\u5bf9\u6570\u636e\u6761\u4ef6\u7684\u8fc7\u6ee4\u3002\u5982\u679c\u5728\u6570\u636e\u91cf\u975e\u5e38\u5927\u7684\u60c5\u51b5\u4e0b\uff0c\u6ca1\u6709WHERE\u6761\u4ef6\u8fc7\u6ee4\u662f\u975e\u5e38\u53ef\u6015\u7684\u3002<\/li>\n\n\n\n
    3. \u6700\u540e\uff0c\u5bf9\u7528\u4e8e\u8fde\u63a5\u7684\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff0c\u5e76\u4e14\u8be5\u5b57\u6bb5\u5728\u591a\u5f20\u8868\u4e2d\u7684\u7c7b\u578b\u5fc5\u987b\u4e00\u81f4\u3002\u6bd4\u5982course_id\u5728student_info\u8868\u548ccourse\u8868\u4e2d\u90fd\u4e3aint(11)\u7c7b\u578b\uff0c\u800c\u4e0d\u80fd\u4e00\u4e2a\u4e3aint\u53e6\u4e00\u4e2a\u4e3avarchar\u7c7b\u578b\u3002<\/li>\n<\/ol>\n\n\n\n
      SELECT s.course_id, NAME, s.student_id, c.course_name \nFROM student_info s JOIN course c\nON s.course_id = c.course_id\nWHERE NAME = '462eed7ac6e791292a79'; #0.001s\n\nDROP INDEX idx_name ON student_info;\n\n\nSELECT s.course_id, NAME, s.student_id, c.course_name \nFROM student_info s JOIN course c\nON s.course_id = c.course_id\nWHERE NAME = '462eed7ac6e791292a79'; #0.227s\n<\/code><\/pre>\n\n\n\n
      132-\u9002\u5408\u521b\u5efa\u7d22\u5f15\u768411\u79cd\u60c5\u51b52_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a>------------------06.00<\/p>\n\n\n\n
      7.\u4f7f\u7528\u5217\u7684\u7c7b\u578b\u5c0f\u7684\u521b\u5efa\u7d22\u5f15<\/h4>\n\n\n\n
      \u6211\u4eec\u8fd9\u91cc\u6240\u8bf4\u7684\u7c7b\u578b\u5927\u5c0f\u6307\u7684\u5c31\u662f\u8be5\u7c7b\u578b\u8868\u793a\u7684\u6570\u636e\u8303\u56f4\u7684\u5927\u5c0f\u3002
      \u6211\u4eec\u5728\u5b9a\u4e49\u8868\u7ed3\u6784\u7684\u65f6\u5019\u8981\u663e\u5f0f\u7684\u6307\u5b9a\u5217\u7684\u7c7b\u578b\uff0c\u4ee5\u6574\u6570\u7c7b\u578b\u4e3a\u4f8b\uff0c\u6709TINYINT\u3001MEDIUMINT\u3001INT\u3001BIGINT\u7b49\uff0c\u5b83\u4eec\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u4f9d\u6b21\u9012\u589e\uff0c\u80fd\u8868\u793a\u7684\u6574\u6570\u8303\u56f4\u5f53\u7136\u4e5f\u662f\u4f9d\u6b21\u9012\u589e\u3002\u5982\u679c\u6211\u4eec\u60f3\u8981\u5bf9\u67d0\u4e2a\u6574\u6570\u5217\u5efa\u7acb\u7d22\u5f15\u7684\u8bdd\uff0c\u5728\u8868\u793a\u7684\u6574\u6570\u8303\u56f4\u5141\u8bb8\u7684\u60c5\u51b5\u4e0b\uff0c\u5c3d\u91cf\u8ba9\u7d22\u5f15\u5217\u4f7f\u7528\u8f83\u5c0f\u7684\u7c7b\u578b\uff0c\u6bd4\u5982\u6211\u4eec\u80fd\u4f7f\u7528INT\u5c31\u4e0d\u8981\u4f7f\u7528BIGINT\uff0c\u80fd\u4f7f\u7528MEDIUMINT\u5c31\u4e0d\u8981\u4f7f\u7528INT\u3002\u8fd9\u662f\u56e0\u4e3a\uff1a<\/p>\n\n\n\n