{"id":131765,"date":"2020-07-04T18:54:01","date_gmt":"2020-07-04T10:54:01","guid":{"rendered":"http:\/\/4563.org\/?p=131765"},"modified":"2020-07-04T18:54:01","modified_gmt":"2020-07-04T10:54:01","slug":"%e5%85%ac%e5%8f%b8%e5%86%85%e9%83%a8mysql%e4%bd%bf%e7%94%a8%e8%a7%84%e8%8c%83%e5%88%86%e4%ba%ab","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=131765","title":{"rendered":"\u516c\u53f8\u5185\u90e8mysql\u4f7f\u7528\u89c4\u8303\u5206\u4eab"},"content":{"rendered":"<p>\u6700\u8fd1\u6d89\u53ca\u6570\u636e\u5e93\u76f8\u5173\u64cd\u4f5c\u8f83\u591a\uff0c\u516c\u53f8\u73b0\u6709\u89c4\u8303\u4e5f\u4e0d\u662f\u592a\u5168\u9762\uff0c\u5c31\u6839\u636e\u7f51\u4e0a\u5404\u8def\u5927\u795e\u7684\u76f8\u5173\u89c4\u8303\uff0c\u6574\u7406\u4e86\u4e00\u4e9b\u81ea\u7528\u7684\u89c4\u8303\u7528\u6cd5\uff0c\u4e07\u671b\u6307\u6b63\u3002<\/p>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u6570\u636e\u5e93\u73af\u5883\" title=\"\u6570\u636e\u5e93\u73af\u5883\"><\/a>\u6570\u636e\u5e93\u73af\u5883<\/h3>\n<ul>\n<li>dev: \u5f00\u53d1\u73af\u5883\uff0c\u5f00\u53d1\u53ef\u8bfb\u5199\uff0c\u53ef\u4fee\u6539\u8868\u7ed3\u6784\u3002\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u4fee\u6539\u8868\u7ed3\u6784\uff0c\u53ef\u4ee5\u968f\u610f\u4fee\u6539\u5176\u4e2d\u7684\u6570\u636e\u4f46\u662f\u9700\u8981\u4fdd\u8bc1\u4e0d\u5f71\u54cd\u5176\u4ed6\u5f00\u53d1\u540c\u4e8b\u3002<\/li>\n<li>test: \u6d4b\u8bd5\u73af\u5883\uff0c\u5f00\u53d1\u53ef\u8bfb\u5199\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u901a\u8fc7\u5de5\u5177\u4fee\u6539\u8868\u7ed3\u6784\u3002<\/li>\n<li>online: \u7ebf\u4e0a\u73af\u5883\uff0c\u5f00\u53d1\u4eba\u5458\u4e0d\u5141\u8bb8\u76f4\u63a5\u5728\u7ebf\u4e0a\u73af\u5883\u8fdb\u884c\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u5982\u679c\u9700\u8981\u64cd\u4f5c\u5fc5\u987b\u627eDBA\u8fdb\u884c\u64cd\u4f5c\u5e76\u8fdb\u884c\u76f8\u5e94\u8bb0\u5f55\uff0c\u7981\u6b62\u8fdb\u884c\u538b\u529b\u6d4b\u8bd5\u3002<\/li>\n<\/ul>\n<p>\u91cd\u70b9\u7684\u95ee\u9898\uff0c\u5404\u4e2a\u73af\u5883\u7684mysql\u670d\u52a1\u5668\u5bf9\u5e94\u7684\u7528\u6237\u6743\u9650\uff0c\u4e00\u5b9a\u8981\u505a\u5230\u6743\u9650\u5212\u5206\u660e\u786e\uff0c\u6709\u8fa8\u8bc6\u5ea6\uff0c\u80fd\u5177\u4f53\u533a\u5206\u4e1a\u52a1\u573a\u666f\u7b49\u3002<\/p>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u547d\u540d\u89c4\u8303\" title=\"\u547d\u540d\u89c4\u8303\"><\/a>\u547d\u540d\u89c4\u8303<\/h3>\n<ol>\n<li>\u57fa\u672c\u547d\u540d\u89c4\u5219<\/li>\n<\/ol>\n<ul>\n<li>\u4f7f\u7528\u6709\u610f\u4e49\u7684\u82f1\u6587\u8bcd\u6c47\uff0c\u8bcd\u6c47\u4e2d\u95f4\u4ee5\u4e0b\u5212\u7ebf\u5206\u9694\u3002\uff08\u4e0d\u8981\u7528\u62fc\u97f3\uff09<\/li>\n<li>\u53ea\u80fd\u4f7f\u7528\u82f1\u6587\u5b57\u6bcd\uff0c\u6570\u5b57\uff0c\u4e0b\u5212\u7ebf\uff0c\u5e76\u4ee5\u82f1\u6587\u5b57\u6bcd\u5f00\u5934\u3002<\/li>\n<li>\u5e93\u3001\u8868\u3001\u5b57\u6bb5\u5168\u90e8\u91c7\u7528\u5c0f\u5199\uff0c\u4e0d\u8981\u4f7f\u7528\u9a7c\u5cf0\u5f0f\u547d\u540d\u3002<\/li>\n<li>\u907f\u514d\u7528ORACLE\u3001MySQL\u7684\u4fdd\u7559\u5b57\uff0c\u5982desc\uff0c\u5173\u952e\u5b57\u5982index\u3002<\/li>\n<li>\u547d\u540d\u7981\u6b62\u8d85\u8fc732\u4e2a\u5b57\u7b26\uff0c\u987b\u89c1\u540d\u4e4b\u610f\uff0c\u5efa\u8bae\u4f7f\u7528\u540d\u8bcd\u4e0d\u662f\u52a8\u8bcd<\/li>\n<li>\u6570\u636e\u5e93\uff0c\u6570\u636e\u8868\u4e00\u5f8b\u4f7f\u7528\u524d\u7f00\n<pre><code>-   \u4e34\u65f6\u5e93\u3001\u8868\u540d\u5fc5\u987b\u4ee5tmp\u4e3a\u524d\u7f00\uff0c\u5e76\u4ee5\u65e5\u671f\u4e3a\u540e\u7f00 -   \u5907\u4efd\u5e93\u3001\u8868\u5fc5\u987b\u4ee5bak\u4e3a\u524d\u7f00\uff0c\u5e76\u4ee5\u65e5\u671f\u4e3a\u540e\u7f00<\/code><\/pre>\n<\/li>\n<\/ul>\n<p>\u4e3a\u4ec0\u4e48\u5e93\u3001\u8868\u3001\u5b57\u6bb5\u5168\u90e8\u91c7\u7528\u5c0f\u5199\uff1f<\/p>\n<p>\u5728 MySQL \u4e2d\uff0c\u6570\u636e\u5e93\u548c\u8868\u5bf9\u5c31\u4e8e\u90a3\u4e9b\u76ee\u5f55\u4e0b\u7684\u76ee\u5f55\u548c\u6587\u4ef6\u3002\u56e0\u800c\uff0c\u64cd\u4f5c\u7cfb\u7edf\u7684\u654f\u611f\u6027\u51b3\u5b9a\u6570\u636e\u5e93\u548c\u8868\u547d\u540d\u7684\u5927\u5c0f\u5199\u654f\u611f\u3002<\/p>\n<ul>\n<li>Windows\u4e0b\u662f\u4e0d\u533a\u5206\u5927\u5c0f\u5199\u7684\u3002<\/li>\n<li>Linux\u4e0b\u5927\u5c0f\u5199\u89c4\u5219<\/li>\n<li>\u6570\u636e\u5e93\u540d\u4e0e\u8868\u540d\u662f\u4e25\u683c\u533a\u5206\u5927\u5c0f\u5199\u7684\uff1b<\/li>\n<li>\u8868\u7684\u522b\u540d\u662f\u4e25\u683c\u533a\u5206\u5927\u5c0f\u5199\u7684\uff1b<\/li>\n<li>\u5217\u540d\u4e0e\u5217\u7684\u522b\u540d\u5728\u6240\u6709\u7684\u60c5\u51b5\u4e0b\u5747\u662f\u5ffd\u7565\u5927\u5c0f\u5199\u7684\uff1b<\/li>\n<li>\u53d8\u91cf\u540d\u4e5f\u662f\u4e25\u683c\u533a\u5206\u5927\u5c0f\u5199\u7684\uff1b<br \/>\u5982\u679c\u5df2\u7ecf\u8bbe\u7f6e\u4e86\u9a7c\u5cf0\u5f0f\u7684\u547d\u540d\u5982\u4f55\u89e3\u51b3\uff1f\u9700\u8981\u5728MySQL\u7684\u914d\u7f6e\u6587\u4ef6my.ini\u4e2d\u589e\u52a0 lower_case_table_names = 1\u5373\u53ef\u3002<\/li>\n<\/ul>\n<ol start=\"2\">\n<li>\n<p>\u8868\u547d\u540d<br \/>\u540c\u4e00\u4e2a\u6a21\u5757\u7684\u8868\u5c3d\u53ef\u80fd\u4f7f\u7528\u76f8\u540c\u7684\u524d\u7f00\uff0c\u8868\u540d\u79f0\u5c3d\u53ef\u80fd\u8868\u8fbe\u542b\u4e49\u3002\u6240\u6709\u65e5\u5fd7\u8868\u5747\u4ee5 <code>log_<\/code> \u5f00\u5934<\/p>\n<\/li>\n<li>\n<p>\u5b57\u6bb5\u547d\u540d<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li>\u8868\u8fbe\u5176\u5b9e\u9645\u542b\u4e49\u7684\u82f1\u6587\u5355\u8bcd\u6216\u7b80\u5199\u3002\u5e03\u5c14\u610f\u4e49\u7684\u5b57\u6bb5\u4ee5<code>is_<\/code>\u4f5c\u4e3a\u524d\u7f00\uff0c\u540e\u63a5\u52a8\u8bcd\u8fc7\u53bb\u5206\u8bcd\u3002<\/li>\n<li>\u5404\u8868\u4e4b\u95f4\u76f8\u540c\u610f\u4e49\u7684\u5b57\u6bb5\u5e94\u540c\u540d\u3002\u5404\u8868\u4e4b\u95f4\u76f8\u540c\u610f\u4e49\u7684\u5b57\u6bb5\uff0c\u4ee5\u53bb\u6389\u6a21\u5757\u524d\u7f00\u7684\u8868\u540d<code>_<\/code>\u5b57\u6bb5\u540d\u547d\u540d\u3002<\/li>\n<li>\u5916\u952e\u5b57\u6bb5\u7528\u8868\u540d<code>_<\/code>\u5b57\u6bb5\u540d\u8868\u793a\u5176\u5173\u8054\u5173\u7cfb\u3002<\/li>\n<li>\u8868\u7684\u4e3b\u952e\u4e00\u822c\u90fd\u7ea6\u5b9a\u6210\u4e3aid\uff0c\u81ea\u589e\u7c7b\u578b\uff0c\u662f\u522b\u7684\u8868\u7684\u5916\u952e\u5747\u4f7f\u7528<code>xxx_id<\/code>\u7684\u65b9\u5f0f\u6765\u8868\u660e\u3002<\/li>\n<\/ul>\n<ol start=\"4\">\n<li>\u7d22\u5f15\u547d\u540d<\/li>\n<\/ol>\n<ul>\n<li>\u975e\u552f\u4e00\u7d22\u5f15\u5fc5\u987b\u6309\u7167\u201cidx_\u5b57\u6bb5\u540d\u79f0_\u5b57\u6bb5\u540d\u79f0[_\u5b57\u6bb5\u540d]\u201d\u8fdb\u884c\u547d\u540d<\/li>\n<li>\u552f\u4e00\u7d22\u5f15\u5fc5\u987b\u6309\u7167\u201cuniq_\u5b57\u6bb5\u540d\u79f0_\u5b57\u6bb5\u540d\u79f0[_\u5b57\u6bb5\u540d]\u201d\u8fdb\u884c\u547d\u540d<\/li>\n<\/ul>\n<ol start=\"5\">\n<li>\u7ea6\u675f\u547d\u540d<\/li>\n<\/ol>\n<ul>\n<li>\u4e3b\u952e\u7ea6\u675f\uff1apk_\u8868\u540d\u79f0\u3002<\/li>\n<li>\u552f\u4e00\u7ea6\u675f\uff1auk_\u8868\u540d\u79f0_\u5b57\u6bb5\u540d\u3002\uff08\u5e94\u7528\u4e2d\u9700\u8981\u540c\u65f6\u6709\u552f\u4e00\u6027\u68c0\u67e5\u903b\u8f91\u3002\uff09<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u8868\u8bbe\u8ba1\u89c4\u8303\" title=\"\u8868\u8bbe\u8ba1\u89c4\u8303\"><\/a>\u8868\u8bbe\u8ba1\u89c4\u8303<\/h3>\n<ol>\n<li>\u8868\u5f15\u64ce\u53d6\u51b3\u4e8e\u5b9e\u9645\u5e94\u7528\u573a\u666f\uff1b\u65e5\u5fd7\u53ca\u62a5\u8868\u7c7b\u8868\u5efa\u8bae\u7528myisam\uff0c\u4e0e\u4ea4\u6613\uff0c\u5ba1\u6838\uff0c\u91d1\u989d\u76f8\u5173\u7684\u8868\u5efa\u8bae\u7528innodb\u5f15\u64ce\u3002\u5982\u65e0\u8bf4\u660e\uff0c\u5efa\u8868\u65f6\u4e00\u5f8b\u91c7\u7528innodb\u5f15\u64ce<\/li>\n<li>\u9ed8\u8ba4\u4f7f\u7528utf8mb4\u5b57\u7b26\u96c6\uff0c\u6570\u636e\u5e93\u6392\u5e8f\u89c4\u5219\u4f7f\u7528utf8mb4_general_ci\uff0c\uff08\u7531\u4e8e\u6570\u636e\u5e93\u5b9a\u4e49\u4f7f\u7528\u4e86\u9ed8\u8ba4\uff0c\u6570\u636e\u8868\u53ef\u4ee5\u4e0d\u518d\u5b9a\u4e49\uff0c\u4f46\u4e3a\u4fdd\u9669\u8d77\u89c1\uff0c\u5efa\u8bae\u90fd\u5199\u4e0a<\/li>\n<\/ol>\n<p>\u4e3a\u4ec0\u4e48\u5b57\u7b26\u96c6\u4e0d\u9009\u62e9utf8\uff0c\u6392\u5e8f\u89c4\u5219\u4e0d\u4f7f\u7528utf8_general_ci<br \/>\u91c7\u7528utf8\u7f16\u7801\u7684MySQL\u65e0\u6cd5\u4fdd\u5b58\u5360\u4f4d\u662f4\u4e2a\u5b57\u8282\u7684Emoji\u8868\u60c5\u3002\u4e3a\u4e86\u4f7f\u540e\u7aef\u7684\u9879\u76ee\uff0c\u5168\u9762\u652f\u6301\u5ba2\u6237\u7aef\u8f93\u5165\u7684Emoji\u8868\u60c5\uff0c\u5347\u7ea7\u7f16\u7801\u4e3autf8mb4\u662f\u6700\u4f73\u89e3\u51b3\u65b9\u6848\u3002\u5bf9\u4e8eJDBC\u8fde\u63a5\u4e32\u8bbe\u7f6e\u4e86characterEncoding\u4e3autf8\u6216\u8005\u505a\u4e86\u4e0a\u8ff0\u914d\u7f6e\u4ecd\u65e7\u65e0\u6cd5\u6b63\u5e38\u63d2\u5165emoji\u6570\u636e\u7684\u60c5\u51b5\uff0c\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u6307\u5b9a\u8fde\u63a5\u7684\u5b57\u7b26\u96c6\u4e3autf8mb4\u3002<\/p>\n<ol start=\"3\">\n<li>\u6240\u6709\u8868\u3001\u5b57\u6bb5\u5747\u5e94\u7528 comment \u5217\u5c5e\u6027\u6765\u63cf\u8ff0\u6b64\u8868\u3001\u5b57\u6bb5\u6240\u4ee3\u8868\u7684\u771f\u6b63\u542b\u4e49\uff0c\u5982\u679a\u4e3e\u503c\u5219\u5efa\u8bae\u5c06\u8be5\u5b57\u6bb5\u4e2d\u4f7f\u7528\u7684\u5185\u5bb9\u90fd\u5b9a\u4e49\u51fa\u6765\u3002<\/li>\n<li>\u5982\u65e0\u8bf4\u660e\uff0c\u8868\u4e2d\u7684\u7b2c\u4e00\u4e2aid\u5b57\u6bb5\u4e00\u5b9a\u662f\u4e3b\u952e\u4e14\u4e3a\u81ea\u52a8\u589e\u957f\uff0c\u7981\u6b62\u5728\u975e\u4e8b\u52a1\u5185\u4f5c\u4e3a\u4e0a\u4e0b\u6587\u4f5c\u4e3a\u6761\u4ef6\u8fdb\u884c\u6570\u636e\u4f20\u9012\u3002\u7981\u6b62\u4f7f\u7528varchar\u7c7b\u578b\u4f5c\u4e3a\u4e3b\u952e\u8bed\u53e5\u8bbe\u8ba1\u3002<\/li>\n<li>\u5982\u65e0\u8bf4\u660e\uff0c\u8868\u5fc5\u987b\u5305\u542bcreate_time\u548cmodify_time\u5b57\u6bb5\uff0c\u5373\u8868\u5fc5\u987b\u5305\u542b\u8bb0\u5f55\u521b\u5efa\u65f6\u95f4\u548c\u4fee\u6539\u65f6\u95f4\u7684\u5b57\u6bb5<\/li>\n<li>\u5982\u65e0\u8bf4\u660e\uff0c\u8868\u5fc5\u987b\u5305\u542bis_del\uff0c\u7528\u6765\u6807\u793a\u6570\u636e\u662f\u5426\u88ab\u5220\u9664\uff0c\u539f\u5219\u4e0a\u6570\u636e\u5e93\u6570\u636e\u4e0d\u5141\u8bb8\u7269\u7406\u5220\u9664\u3002<\/li>\n<li>\u7528\u5c3d\u91cf\u5c11\u7684\u5b58\u50a8\u7a7a\u95f4\u6765\u5b58\u6570\u4e00\u4e2a\u5b57\u6bb5\u7684\u6570\u636e<\/li>\n<\/ol>\n<ul>\n<li>\u80fd\u7528int\u7684\u5c31\u4e0d\u7528char\u6216\u8005varchar<\/li>\n<li>\u80fd\u7528tinyint\u7684\u5c31\u4e0d\u7528int<\/li>\n<li>\u4f7f\u7528UNSIGNED\u5b58\u50a8\u975e\u8d1f\u6570\u503c\u3002<\/li>\n<li>\u4e0d\u5efa\u8bae\u4f7f\u7528ENUM\u3001SET\u7c7b\u578b\uff0c\u4f7f\u7528TINYINT\u6765\u4ee3\u66ff<\/li>\n<li>\u4f7f\u7528\u77ed\u6570\u636e\u7c7b\u578b\uff0c\u6bd4\u5982\u53d6\u503c\u8303\u56f4\u4e3a0-80\u65f6\uff0c\u4f7f\u7528TINYINT UNSIGNED<\/li>\n<li>\u5b58\u50a8\u7cbe\u786e\u6d6e\u70b9\u6570\u5fc5\u987b\u4f7f\u7528DECIMAL\u66ff\u4ee3FLOAT\u548cDOUBLE<\/li>\n<li>\u65f6\u95f4\u5b57\u6bb5\uff0c\u9664\u7279\u6b8a\u60c5\u51b5\u4e00\u5f8b\u91c7\u7528int\u6765\u8bb0\u5f55unix_timestamp\n<ul>\n<li>\u5b58\u50a8\u5e74\u4f7f\u7528YEAR\u7c7b\u578b\u3002<\/li>\n<li>\u5b58\u50a8\u65e5\u671f\u4f7f\u7528DATE\u7c7b\u578b\u3002<\/li>\n<li>\u5b58\u50a8\u65f6\u95f4\uff08\u7cbe\u786e\u5230\u79d2\uff09\u5efa\u8bae\u4f7f\u7528TIMESTAMP\u7c7b\u578b\uff0c\u56e0\u4e3aTIMESTAMP\u4f7f\u75284\u5b57\u8282\uff0cDATETIME\u4f7f\u75288\u4e2a\u5b57\u8282\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5efa\u8bae\u4f7f\u7528INT UNSIGNED\u5b58\u50a8IPV4\u3002<\/li>\n<li>\u5c3d\u53ef\u80fd\u4e0d\u4f7f\u7528TEXT\u3001BLOB\u7c7b\u578b<\/li>\n<li>\u7981\u6b62\u5728\u6570\u636e\u5e93\u4e2d\u4f7f\u7528VARBINARY\u3001BLOB\u5b58\u50a8\u56fe\u7247\u3001\u6587\u4ef6\u7b49\u3002\u5efa\u8bae\u4f7f\u7528\u5176\u4ed6\u65b9\u5f0f\u5b58\u50a8\uff08TFS\/SFS\uff09\uff0cMySQL\u53ea\u4fdd\u5b58\u6307\u9488\u4fe1\u606f\u3002<\/li>\n<li>\u5355\u6761\u8bb0\u5f55\u5927\u5c0f\u7981\u6b62\u8d85\u8fc78k\uff08\u5217\u957f\u5ea6(\u4e2d\u6587)_3(UTF8)+\u5217\u957f\u5ea6(\u82f1\u6587)_1\uff09<\/li>\n<\/ul>\n<p>datetime\u4e0etimestamp\u6709\u4ec0\u4e48\u4e0d\u540c\uff1f<br \/>\u76f8\u540c\u70b9\uff1a<br \/>TIMESTAMP\u5217\u7684\u663e\u793a\u683c\u5f0f\u4e0eDATETIME\u5217\u76f8\u540c\u3002\u663e\u793a\u5bbd\u5ea6\u56fa\u5b9a\u572819\u5b57\u7b26\uff0c\u5e76\u4e14\u683c\u5f0f\u4e3aYYYY-MM-DD HH:MM:SS\u3002<br \/>\u4e0d\u540c\u70b9\uff1a<\/p>\n<ul>\n<li>TIMESTAMP\n<ul>\n<li>4\u4e2a\u5b57\u8282\u50a8\u5b58\uff0c\u65f6\u95f4\u8303\u56f4\uff1a1970-01-01 08:00:01 ~ 2038-01-19 11:14:07<\/li>\n<li>\u503c\u4ee5UTC\u683c\u5f0f\u4fdd\u5b58\uff0c\u6d89\u53ca\u65f6\u533a\u8f6c\u5316 \uff0c\u5b58\u50a8\u65f6\u5bf9\u5f53\u524d\u7684\u65f6\u533a\u8fdb\u884c\u8f6c\u6362\uff0c\u68c0\u7d22\u65f6\u518d\u8f6c\u6362\u56de\u5f53\u524d\u7684\u65f6\u533a\u3002<\/li>\n<li>datetime<\/li>\n<li>8\u4e2a\u5b57\u8282\u50a8\u5b58\uff0c\u65f6\u95f4\u8303\u56f4\uff1a1000-01-01 00:00:00 ~ 9999-12-31 23:59:59<\/li>\n<li>\u5b9e\u9645\u683c\u5f0f\u50a8\u5b58\uff0c\u4e0e\u65f6\u533a\u65e0\u5173<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u5982\u4f55\u4f7f\u7528TIMESTAMP\u7684\u81ea\u52a8\u8d4b\u503c\u5c5e\u6027\uff1f<\/p>\n<ul>\n<li>\u5c06\u5f53\u524d\u65f6\u95f4\u4f5c\u4e3ats\u7684\u9ed8\u8ba4\u503c\uff1ats TIMESTAMP DEFAULT CURRENT_TIMESTAMP\u3002<\/li>\n<li>\u5f53\u884c\u66f4\u65b0\u65f6\uff0c\u66f4\u65b0ts\u7684\u503c\uff1ats TIMESTAMP DEFAULT 0 ON UPDATE CURRENT_TIMESTAMP\u3002<\/li>\n<li>\u53ef\u4ee5\u5c061\u548c2\u7ed3\u5408\u8d77\u6765\uff1ats TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP\u3002<\/li>\n<\/ul>\n<p>\u5982\u4f55\u4f7f\u7528INT UNSIGNED\u5b58\u50a8ip\uff1f<br \/>\u4f7f\u7528INT UNSIGNED\u800c\u4e0d\u662fchar(15)\u6765\u5b58\u50a8ipv4\u5730\u5740\uff0c\u901a\u8fc7MySQL\u51fd\u6570inet_ntoa\u548cinet_aton\u6765\u8fdb\u884c\u8f6c\u5316\u3002Ipv6\u5730\u5740\u76ee\u524d\u6ca1\u6709\u8f6c\u5316\u51fd\u6570\uff0c\u9700\u8981\u4f7f\u7528DECIMAL\u6216\u8005\u4e24\u4e2abigINT\u6765\u5b58\u50a8\u3002<\/p>\n<ol start=\"8\">\n<li>\n<p>\u5982\u65e0\u5907\u6ce8\uff0c\u6240\u6709\u5b57\u6bb5\u90fd\u8bbe\u7f6eNOT NULL\uff0c\u5e76\u8bbe\u7f6e\u9ed8\u8ba4\u503c\uff1b<\/p>\n<\/li>\n<li>\n<p>\u7981\u6b62\u5728\u6570\u636e\u5e93\u4e2d\u5b58\u50a8\u660e\u6587\u5bc6\u7801<\/p>\n<\/li>\n<li>\n<p>\u5982\u65e0\u5907\u6ce8\uff0c\u6240\u6709\u7684\u5e03\u5c14\u503c\u5b57\u6bb5\uff0c\u5982is_hot\u3001is_deleted\uff0c\u90fd\u5fc5\u987b\u8bbe\u7f6e\u4e00\u4e2a\u9ed8\u8ba4\u503c\uff0c\u5e76\u8bbe\u4e3a0\uff1b<\/p>\n<\/li>\n<li>\n<p>\u5982\u65e0\u5907\u6ce8\uff0c\u6392\u5e8f\u5b57\u6bb5order_id\u5728\u7a0b\u5e8f\u4e2d\u9ed8\u8ba4\u4f7f\u7528\u964d\u5e8f\u6392\u5217\uff1b<\/p>\n<\/li>\n<li>\n<p>\u6574\u5f62\u5b9a\u4e49\u4e2d\u4e0d\u6dfb\u52a0\u957f\u5ea6\uff0c\u6bd4\u5982\u4f7f\u7528INT\uff0c\u800c\u4e0d\u662fINT[4]<\/p>\n<p><strong>INT[M]**<\/strong>\uff0cM\u503c\u4ee3\u8868\u4ec0\u4e48\u542b\u4e49\uff1f**<br \/>\u6ce8\u610f\u6570\u503c\u7c7b\u578b\u62ec\u53f7\u540e\u9762\u7684\u6570\u5b57\u53ea\u662f\u8868\u793a\u5bbd\u5ea6\u800c\u8ddf\u5b58\u50a8\u8303\u56f4\u6ca1\u6709\u5173\u7cfb\u3002\u5f88\u591a\u4eba\u4ed6\u4eec\u8ba4\u4e3aINT(4)\u548cINT(10)\u5176\u53d6\u503c\u8303\u56f4\u5206\u522b\u662f (-9999\u52309999)\u548c(-9999999999\u52309999999999)\uff0c\u8fd9\u79cd\u7406\u89e3\u662f\u9519\u8bef\u7684\u3002\u5176\u5b9e\u5bf9\u6574\u578b\u4e2d\u7684 M\u503c\u4e0e ZEROFILL \u5c5e\u6027\u7ed3\u5408\u4f7f\u7528\u65f6\u53ef\u4ee5\u5b9e\u73b0\u5217\u503c\u7b49\u5bbd\u3002\u4e0d\u7ba1INT[M]\u4e2dM\u503c\u662f\u591a\u5c11\uff0c\u5176\u53d6\u503c\u8303\u56f4\u8fd8\u662f (-2147483648\u52302147483647 \u6709\u7b26\u53f7\u65f6)\uff0c(0\u52304294967295\u65e0\u7b26\u53f7\u65f6)\u3002<br \/>\u663e\u793a\u5bbd\u5ea6\u5e76\u4e0d\u9650\u5236\u53ef\u4ee5\u5728\u5217\u5185\u4fdd\u5b58\u7684\u503c\u7684\u8303\u56f4\uff0c\u4e5f\u4e0d\u9650\u5236\u8d85\u8fc7\u5217\u7684\u6307\u5b9a\u5bbd\u5ea6\u7684\u503c\u7684\u663e\u793a\u3002\u5f53\u7ed3\u5408\u53ef\u9009\u6269\u5c55\u5c5e\u6027ZEROFILL\u4f7f\u7528\u65f6\u9ed8\u8ba4\u8865\u5145\u7684\u7a7a\u683c\u7528\u96f6\u4ee3\u66ff\u3002\u4f8b\u5982\uff1a\u5bf9\u4e8e\u58f0\u660e\u4e3aINT(5) ZEROFILL\u7684\u5217\uff0c\u503c4\u68c0\u7d22\u4e3a00004\u3002\u8bf7\u6ce8\u610f\u5982\u679c\u5728\u6574\u6570\u5217\u4fdd\u5b58\u8d85\u8fc7\u663e\u793a\u5bbd\u5ea6\u7684\u4e00\u4e2a\u503c\uff0c\u5f53MySQL\u4e3a\u590d\u6742\u8054\u63a5\u751f\u6210\u4e34\u65f6\u8868\u65f6\u4f1a\u9047\u5230\u95ee\u9898\uff0c\u56e0\u4e3a\u5728\u8fd9\u4e9b\u60c5\u51b5\u4e0bMySQL\u76f8\u4fe1\u6570\u636e\u9002\u5408\u539f\u5217\u5bbd\u5ea6\uff0c\u5982\u679c\u4e3a\u4e00\u4e2a\u6570\u503c\u5217\u6307\u5b9aZEROFILL, MySQL\u81ea\u52a8\u4e3a\u8be5\u5217\u6dfb\u52a0UNSIGNED\u5c5e\u6027\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528VARBINARY\u5b58\u50a8\u5927\u5c0f\u5199\u654f\u611f\u7684\u53d8\u957f\u5b57\u7b26\u4e32<\/p>\n<\/li>\n<\/ol>\n<p>\u4ec0\u4e48\u65f6\u5019\u7528CHAR\uff0c\u4ec0\u4e48\u65f6\u5019\u7528VARCHAR\uff1f<br \/> CHAR\u548cVARCHAR\u7c7b\u578b\u7c7b\u4f3c\uff0c\u4f46\u5b83\u4eec\u4fdd\u5b58\u548c\u68c0\u7d22\u7684\u65b9\u5f0f\u4e0d\u540c\u3002\u5b83\u4eec\u7684\u6700\u5927\u957f\u5ea6\u548c\u662f\u5426\u5c3e\u90e8\u7a7a\u683c\u88ab\u4fdd\u7559\u7b49\u65b9\u9762\u4e5f\u4e0d\u540c\u3002CHAR\u548cVARCHAR\u7c7b\u578b\u58f0\u660e\u7684\u957f\u5ea6\u8868\u793a\u4f60\u60f3\u8981\u4fdd\u5b58\u7684\u6700\u5927\u5b57\u7b26\u6570\u3002\u4f8b\u5982\uff0cCHAR(30)\u53ef\u4ee5\u5360\u752830\u4e2a\u5b57\u7b26\u3002<\/p>\n<ul>\n<li>CHAR\u5217\u7684\u957f\u5ea6\u56fa\u5b9a\u4e3a\u521b\u5efa\u8868\u65f6\u58f0\u660e\u7684\u957f\u5ea6\u3002\u957f\u5ea6\u53ef\u4ee5\u4e3a\u4ece0\u5230255\u7684\u4efb\u4f55\u503c\u3002\u5f53\u4fdd\u5b58CHAR\u503c\u65f6\uff0c\u5728\u5b83\u4eec\u7684\u53f3\u8fb9\u586b\u5145\u7a7a\u683c\u4ee5\u8fbe\u5230\u6307\u5b9a\u7684\u957f\u5ea6\u3002\u5f53\u68c0\u7d22\u5230CHAR\u503c\u65f6\uff0c\u5c3e\u90e8\u7684\u7a7a\u683c\u88ab\u5220\u9664\u6389\u3002\u5728\u5b58\u50a8\u6216\u68c0\u7d22\u8fc7\u7a0b\u4e2d\u4e0d\u8fdb\u884c\u5927\u5c0f\u5199\u8f6c\u6362\u3002<\/li>\n<li>VARCHAR\u5217\u4e2d\u7684\u503c\u4e3a\u53ef\u53d8\u957f\u5b57\u7b26\u4e32\u3002\u957f\u5ea6\u53ef\u4ee5\u6307\u5b9a\u4e3a0\u523065,535\u4e4b\u95f4\u7684\u503c\u3002(VARCHAR\u7684\u6700\u5927\u6709\u6548\u957f\u5ea6\u7531\u6700\u5927\u884c\u5927\u5c0f\u548c\u4f7f\u7528\u7684\u5b57\u7b26\u96c6\u786e\u5b9a\u3002\u6574\u4f53\u6700\u5927\u957f\u5ea6\u662f65,532\u5b57\u8282\uff09\u3002<\/li>\n<li>\u540cCHAR\u5bf9\u6bd4\uff0cVARCHAR\u503c\u4fdd\u5b58\u65f6\u53ea\u4fdd\u5b58\u9700\u8981\u7684\u5b57\u7b26\u6570\uff0c\u53e6\u52a0\u4e00\u4e2a\u5b57\u8282\u6765\u8bb0\u5f55\u957f\u5ea6(\u5982\u679c\u5217\u58f0\u660e\u7684\u957f\u5ea6\u8d85\u8fc7255\uff0c\u5219\u4f7f\u7528\u4e24\u4e2a\u5b57\u8282)\u3002VARCHAR\u503c\u4fdd\u5b58\u65f6\u4e0d\u8fdb\u884c\u586b\u5145\u3002\u5f53\u503c\u4fdd\u5b58\u548c\u68c0\u7d22\u65f6\u5c3e\u90e8\u7684\u7a7a\u683c\u4ecd\u4fdd\u7559\uff0c\u7b26\u5408\u6807\u51c6SQL\u3002<\/li>\n<li>char\u9002\u5408\u5b58\u50a8\u7528\u6237\u5bc6\u7801\u7684MD5\u54c8\u5e0c\u503c\uff0c\u5b83\u7684\u957f\u5ea6\u603b\u662f\u4e00\u6837\u7684\u3002\u5bf9\u4e8e\u7ecf\u5e38\u6539\u53d8\u7684\u503c\uff0cchar\u4e5f\u597d\u4e8evarchar,\u56e0\u4e3a\u56fa\u5b9a\u957f\u5ea6\u7684\u884c\u4e0d\u5bb9\u6613\u4ea7\u751f\u788e\u7247\uff0c\u5bf9\u4e8e\u5f88\u77ed\u7684\u5217\uff0cchar\u7684\u6548\u7387\u4e5f\u9ad8\u4e8evarchar\u3002char(1)\u5b57\u7b26\u4e32\u5bf9\u4e8e\u5355\u5b57\u8282\u5b57\u7b26\u96c6\u53ea\u4f1a\u5360\u7528\u4e00\u4e2a\u5b57\u8282\uff0c\u4f46\u662fvarchar(1)\u5219\u4f1a\u5360\u75282\u4e2a\u5b57\u8282\uff0c\u56e0\u4e3a1\u4e2a\u5b57\u8282\u7528\u6765\u5b58\u50a8\u957f\u5ea6\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u7d22\u5f15\u8bbe\u8ba1\u89c4\u8303\" title=\"\u7d22\u5f15\u8bbe\u8ba1\u89c4\u8303\"><\/a>\u7d22\u5f15\u8bbe\u8ba1\u89c4\u8303<\/h3>\n<p>MySQL\u7684\u67e5\u8be2\u901f\u5ea6\u4f9d\u8d56\u826f\u597d\u7684\u7d22\u5f15\u8bbe\u8ba1\uff0c\u56e0\u6b64\u7d22\u5f15\u5bf9\u4e8e\u9ad8\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002\u5408\u7406\u7684\u7d22\u5f15\u4f1a\u52a0\u5feb\u67e5\u8be2\u901f\u5ea6\uff08\u5305\u62ecUPDATE\u548cDELETE\u7684\u901f\u5ea6\uff0cMySQL\u4f1a\u5c06\u5305\u542b\u8be5\u884c\u7684page\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u7136\u540e\u8fdb\u884cUPDATE\u6216\u8005DELETE\u64cd\u4f5c\uff09\uff0c\u4e0d\u5408\u7406\u7684\u7d22\u5f15\u4f1a\u964d\u4f4e\u901f\u5ea6\u3002MySQL\u7d22\u5f15\u67e5\u627e\u7c7b\u4f3c\u4e8e\u65b0\u534e\u5b57\u5178\u7684\u62fc\u97f3\u548c\u90e8\u9996\u67e5\u627e\uff0c\u5f53\u62fc\u97f3\u548c\u90e8\u9996\u7d22\u5f15\u4e0d\u5b58\u5728\u65f6\uff0c\u53ea\u80fd\u901a\u8fc7\u4e00\u9875\u4e00\u9875\u7684\u7ffb\u9875\u6765\u67e5\u627e\u3002\u5f53MySQL\u67e5\u8be2\u4e0d\u80fd\u4f7f\u7528\u7d22\u5f15\u65f6\uff0cMySQL\u4f1a\u8fdb\u884c\u5168\u8868\u626b\u63cf\uff0c\u4f1a\u6d88\u8017\u5927\u91cf\u7684IO\u3002\u7d22\u5f15\u7684\u7528\u9014\uff1a\u53bb\u91cd\u3001\u52a0\u901f\u5b9a\u4f4d\u3001\u907f\u514d\u6392\u5e8f\u3001\u8986\u76d6\u7d22\u5f15\u3002<\/p>\n<p>\u4ec0\u4e48\u662f\u8986\u76d6\u7d22\u5f15<br \/>InnoDB\u5b58\u50a8\u5f15\u64ce\u4e2d\uff0csecondary index\uff08\u975e\u4e3b\u952e\u7d22\u5f15\uff09\u4e2d\u6ca1\u6709\u76f4\u63a5\u5b58\u50a8\u884c\u5730\u5740\uff0c\u5b58\u50a8\u4e3b\u952e\u503c\u3002\u5982\u679c\u7528\u6237\u9700\u8981\u67e5\u8be2secondary index\u4e2d\u6240\u4e0d\u5305\u542b\u7684\u6570\u636e\u5217\u65f6\uff0c\u9700\u8981\u5148\u901a\u8fc7secondary index\u67e5\u627e\u5230\u4e3b\u952e\u503c\uff0c\u7136\u540e\u518d\u901a\u8fc7\u4e3b\u952e\u67e5\u8be2\u5230\u5176\u4ed6\u6570\u636e\u5217\uff0c\u56e0\u6b64\u9700\u8981\u67e5\u8be2\u4e24\u6b21\u3002\u8986\u76d6\u7d22\u5f15\u7684\u6982\u5ff5\u5c31\u662f\u67e5\u8be2\u53ef\u4ee5\u901a\u8fc7\u5728\u4e00\u4e2a\u7d22\u5f15\u4e2d\u5b8c\u6210\uff0c\u8986\u76d6\u7d22\u5f15\u6548\u7387\u4f1a\u6bd4\u8f83\u9ad8\uff0c\u4e3b\u952e\u67e5\u8be2\u662f\u5929\u7136\u7684\u8986\u76d6\u7d22\u5f15\u3002\u5408\u7406\u7684\u521b\u5efa\u7d22\u5f15\u4ee5\u53ca\u5408\u7406\u7684\u4f7f\u7528\u67e5\u8be2\u8bed\u53e5\uff0c\u5f53\u4f7f\u7528\u5230\u8986\u76d6\u7d22\u5f15\u65f6\u53ef\u4ee5\u83b7\u5f97\u6027\u80fd\u63d0\u5347\u3002\u6bd4\u5982SELECT email,uid FROM user_email WHERE uid=xx\uff0c\u5982\u679cuid\u4e0d\u662f\u4e3b\u952e\uff0c\u9002\u5f53\u65f6\u5019\u53ef\u4ee5\u5c06\u7d22\u5f15\u6dfb\u52a0\u4e3aindex(uid,email)\uff0c\u4ee5\u83b7\u5f97\u6027\u80fd\u63d0\u5347\u3002<\/p>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u7d22\u5f15\u7684\u57fa\u672c\u89c4\u8303\" title=\"\u7d22\u5f15\u7684\u57fa\u672c\u89c4\u8303\"><\/a>\u7d22\u5f15\u7684\u57fa\u672c\u89c4\u8303<\/h3>\n<ol>\n<li>\u7d22\u5f15\u6570\u91cf\u63a7\u5236\uff0c\u5355\u5f20\u8868\u4e2d\u7d22\u5f15\u6570\u91cf\u4e0d\u8d85\u8fc75\u4e2a\uff0c\u5355\u4e2a\u7d22\u5f15\u4e2d\u7684\u5b57\u6bb5\u6570\u4e0d\u8d85\u8fc75\u4e2a\u3002<\/li>\n<\/ol>\n<ul>\n<li>\u7efc\u5408\u8bc4\u4f30\u6570\u636e\u5bc6\u5ea6\u548c\u5206\u5e03<\/li>\n<li>\u8003\u8651\u67e5\u8be2\u548c\u66f4\u65b0\u6bd4\u4f8b<\/li>\n<\/ul>\n<p><strong>\u4e3a\u4ec0\u4e48\u4e00\u5f20\u8868\u4e2d\u4e0d\u80fd\u5b58\u5728\u8fc7\u591a\u7684\u7d22\u5f15\uff1f<\/strong><br \/>InnoDB\u7684secondary index\u4f7f\u7528b+tree\u6765\u5b58\u50a8\uff0c\u56e0\u6b64\u5728UPDATE\u3001DELETE\u3001INSERT\u7684\u65f6\u5019\u9700\u8981\u5bf9b+tree\u8fdb\u884c\u8c03\u6574\uff0c\u8fc7\u591a\u7684\u7d22\u5f15\u4f1a\u51cf\u6162\u66f4\u65b0\u7684\u901f\u5ea6\u3002<\/p>\n<ol start=\"2\">\n<li>\u5bf9\u5b57\u7b26\u4e32\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\uff0c\u524d\u7f00\u7d22\u5f15\u957f\u5ea6\u4e0d\u8d85\u8fc78\u4e2a\u5b57\u7b26\uff0c\u5efa\u8bae\u4f18\u5148\u8003\u8651\u524d\u7f00\u7d22\u5f15\uff0c\u5fc5\u8981\u65f6\u53ef\u6dfb\u52a0\u4f2a\u5217\u5e76\u5efa\u7acb\u7d22\u5f15\u3002<\/li>\n<\/ol>\n<ul>\n<li>\n<p>\u4e0d\u8981\u7d22\u5f15blob\/text\u7b49\u5b57\u6bb5,\u4e0d\u8981\u7d22\u5f15\u5927\u578b\u5b57\u6bb5,\u8fd9\u6837\u505a\u4f1a\u8ba9\u7d22\u5f15\u5360\u7528\u592a\u591a\u7684\u5b58\u50a8\u7a7a\u95f4<\/p>\n<p><strong>\u4ec0\u4e48\u662f\u524d\u7f00\u7d22\u5f15\uff1f<\/strong><\/p>\n<p>\u524d\u7f00\u7d22\u5f15\u8bf4\u767d\u4e86\u5c31\u662f\u5bf9\u6587\u672c\u7684\u524d\u51e0\u4e2a\u5b57\u7b26\uff08\u5177\u4f53\u662f\u51e0\u4e2a\u5b57\u7b26\u5728\u5efa\u7acb\u7d22\u5f15\u65f6\u6307\u5b9a\uff09\u5efa\u7acb\u7d22\u5f15\uff0c\u8fd9\u6837\u5efa\u7acb\u8d77\u6765\u7684\u7d22\u5f15\u66f4\u5c0f\uff0c\u6240\u4ee5\u67e5\u8be2\u66f4\u5feb\u3002 \u524d\u7f00\u7d22\u5f15\u80fd\u6709\u6548\u51cf\u5c0f\u7d22\u5f15\u6587\u4ef6\u7684\u5927\u5c0f\uff0c\u63d0\u9ad8\u7d22\u5f15\u7684\u901f\u5ea6\u3002\u4f46\u662f\u524d\u7f00\u7d22\u5f15\u4e5f\u6709\u5b83\u7684\u574f\u5904\uff1aMySQL \u4e0d\u80fd\u5728 ORDER BY \u6216 GROUP BY \u4e2d\u4f7f\u7528\u524d\u7f00\u7d22\u5f15\uff0c\u4e5f\u4e0d\u80fd\u628a\u5b83\u4eec\u7528\u4f5c\u8986\u76d6\u7d22\u5f15(Covering Index)\u3002<br \/>\u5efa\u7acb\u524d\u7f00\u7d22\u5f15\u7684\u8bed\u6cd5\uff1aALTER TABLE table_name ADD KEY(column_name(prefix_length));<\/p>\n<\/li>\n<\/ul>\n<ol start=\"3\">\n<li>\u4e3b\u952e\u51c6\u5219<\/li>\n<\/ol>\n<ul>\n<li>\u8868\u5fc5\u987b\u6709\u4e3b\u952e<\/li>\n<li>\u4e0d\u4f7f\u7528\u66f4\u65b0\u9891\u7e41\u7684\u5217<\/li>\n<li>\u5c3d\u91cf\u4e0d\u9009\u62e9\u5b57\u7b26\u4e32\u5217<\/li>\n<li>\u4e0d\u4f7f\u7528UUID MD5 HASH<\/li>\n<li>\u9ed8\u8ba4\u4f7f\u7528\u975e\u7a7a\u7684\u552f\u4e00\u952e<\/li>\n<li>\u5efa\u8bae\u9009\u62e9\u81ea\u589e\u6216\u53d1\u53f7\u5668<\/li>\n<\/ul>\n<ol start=\"4\">\n<li>\u91cd\u8981\u7684SQL\u5fc5\u987b\u88ab\u7d22\u5f15\uff0c\u6838\u5fc3SQL\u4f18\u5148\u8003\u8651\u8986\u76d6\u7d22\u7d22\u5f15<\/li>\n<\/ol>\n<ul>\n<li>UPDATE\u3001DELETE\u8bed\u53e5\u7684WHERE\u6761\u4ef6\u5217<\/li>\n<li>ORDER BY\u3001GROUP BY\u3001DISTINCT\u7684\u5b57\u6bb5<\/li>\n<li>\u591a\u8868JOIN\u7684\u5b57\u6bb5<\/li>\n<\/ul>\n<ol start=\"5\">\n<li>\u533a\u5206\u5ea6\u6700\u5927\u7684\u5b57\u6bb5\u653e\u5728\u524d\u9762<\/li>\n<\/ol>\n<ul>\n<li>\u9009\u62e9\u7b5b\u9009\u6027\u66f4\u4f18\u7684\u5b57\u6bb5\u653e\u5728\u6700\u524d\u9762\uff0c\u6bd4\u5982\u5355\u53f7\u3001userid\u7b49\uff0ctype\uff0cstatus\u7b49\u7b5b\u9009\u6027\u4e00\u822c\u4e0d\u5efa\u8bae\u653e\u5728\u6700\u524d\u9762<\/li>\n<li>\u7d22\u5f15\u6839\u636e\u5de6\u524d\u7f00\u539f\u5219\uff0c\u5f53\u5efa\u7acb\u4e00\u4e2a\u8054\u5408\u7d22\u5f15(a,b,c)\uff0c\u5219\u67e5\u8be2\u6761\u4ef6\u91cc\u9762\u53ea\u6709\u5305\u542b(a)\u6216(a,b)\u6216(a,b,c)\u7684\u65f6\u5019\u624d\u80fd\u8d70\u7d22\u5f15,(a,c)\u4f5c\u4e3a\u6761\u4ef6\u7684\u65f6\u5019\u53ea\u80fd\u4f7f\u7528\u5230a\u5217\u7d22\u5f15,\u6240\u4ee5\u8fd9\u4e2a\u65f6\u5019\u8981\u786e\u5b9aa\u7684\u8fd4\u56de\u5217\u4e00\u5b9a\u4e0d\u80fd\u592a\u591a\uff0c\u4e0d\u7136\u8bed\u53e5\u8bbe\u8ba1\u5c31\u4e0d\u5408\u7406,(b,c)\u5219\u4e0d\u80fd\u8d70\u7d22\u5f15<\/li>\n<li>\u5408\u7406\u521b\u5efa\u8054\u5408\u7d22\u5f15\uff08\u907f\u514d\u5197\u4f59\uff09\uff0c(a,b,c) \u76f8\u5f53\u4e8e (a) \u3001(a,b) \u3001(a,b,c)<\/li>\n<\/ul>\n<ol start=\"6\">\n<li>\u7d22\u5f15\u7981\u5fcc<\/li>\n<\/ol>\n<ul>\n<li>\u4e0d\u5728\u4f4e\u57fa\u6570\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\uff0c\u4f8b\u5982\u201c\u6027\u522b\u201d<\/li>\n<li>\u4e0d\u5728\u7d22\u5f15\u5217\u8fdb\u884c\u6570\u5b66\u8fd0\u7b97\u548c\u51fd\u6570\u8fd0\u7b97<\/li>\n<li>\u4e0d\u8981\u7d22\u5f15\u5e38\u7528\u7684\u5c0f\u578b\u8868<\/li>\n<\/ul>\n<ol start=\"7\">\n<li>\u5c3d\u91cf\u4e0d\u4f7f\u7528\u5916\u952e<\/li>\n<\/ol>\n<ul>\n<li>\u5916\u952e\u7528\u6765\u4fdd\u62a4\u53c2\u7167\u5b8c\u6574\u6027\uff0c\u53ef\u5728\u4e1a\u52a1\u7aef\u5b9e\u73b0<\/li>\n<li>\u5bf9\u7236\u8868\u548c\u5b50\u8868\u7684\u64cd\u4f5c\u4f1a\u76f8\u4e92\u5f71\u54cd\uff0c\u964d\u4f4e\u53ef\u7528\u6027<\/li>\n<li>INNODB\u672c\u8eab\u5bf9online DDL\u7684\u9650\u5236<\/li>\n<\/ul>\n<p><strong>MYSQL \u4e2d\u7d22\u5f15\u7684\u9650\u5236<\/strong><\/p>\n<ul>\n<li>MYISAM \u5b58\u50a8\u5f15\u64ce\u7d22\u5f15\u957f\u5ea6\u7684\u603b\u548c\u4e0d\u80fd\u8d85\u8fc7 1000 \u5b57\u8282<\/li>\n<li>BLOB \u548c TEXT \u7c7b\u578b\u7684\u5217\u53ea\u80fd\u521b\u5efa\u524d\u7f00\u7d22\u5f15<\/li>\n<li>MYSQL \u76ee\u524d\u4e0d\u652f\u6301\u51fd\u6570\u7d22\u5f15<\/li>\n<li>\u4f7f\u7528\u4e0d\u7b49\u4e8e (!= \u6216\u8005 &lt;&gt;) \u7684\u65f6\u5019, MYSQL \u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u3002<\/li>\n<li>\u8fc7\u6ee4\u5b57\u6bb5\u4f7f\u7528\u51fd\u6570\u8fd0\u7b97 (\u5982 abs (column)) \u540e, MYSQL\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u3002<\/li>\n<li>join\u8bed\u53e5\u4e2djoin\u6761\u4ef6\u5b57\u6bb5\u7c7b\u578b\u4e0d\u4e00\u81f4\u7684\u65f6\u5019MYSQL\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15<\/li>\n<li>\u4f7f\u7528 LIKE \u64cd\u4f5c\u7684\u65f6\u5019\u5982\u679c\u6761\u4ef6\u4ee5\u901a\u914d\u7b26\u5f00\u59cb (\u5982 \u2018%abc\u2026\u2019)\u65f6, MYSQL\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u3002<\/li>\n<li>\u4f7f\u7528\u975e\u7b49\u503c\u67e5\u8be2\u7684\u65f6\u5019, MYSQL \u65e0\u6cd5\u4f7f\u7528 Hash \u7d22\u5f15\u3002<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u8bed\u53e5\u8bbe\u8ba1\u89c4\u8303\" title=\"\u8bed\u53e5\u8bbe\u8ba1\u89c4\u8303\"><\/a>\u8bed\u53e5\u8bbe\u8ba1\u89c4\u8303<\/h3>\n<ol>\n<li>\u4f7f\u7528\u9884\u7f16\u8bd1\u8bed\u53e5<\/li>\n<\/ol>\n<ul>\n<li>\u53ea\u4f20\u53c2\u6570\uff0c\u6bd4\u4f20\u9012SQL\u8bed\u53e5\u66f4\u9ad8\u6548<\/li>\n<li>\u4e00\u6b21\u89e3\u6790\uff0c\u591a\u6b21\u4f7f\u7528<\/li>\n<li>\u964d\u4f4eSQL\u6ce8\u5165\u6982\u7387<\/li>\n<\/ul>\n<ol start=\"2\">\n<li>\u907f\u514d\u9690\u5f0f\u8f6c\u6362<\/li>\n<\/ol>\n<ul>\n<li>\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548<\/li>\n<\/ul>\n<ol start=\"3\">\n<li>\u5145\u5206\u5229\u7528\u524d\u7f00\u7d22\u5f15<\/li>\n<\/ol>\n<ul>\n<li>\u5fc5\u987b\u662f\u6700\u5de6\u524d\u7f00<\/li>\n<li>\u4e0d\u53ef\u80fd\u540c\u65f6\u7528\u5230\u4e24\u4e2a\u8303\u56f4\u6761\u4ef6<\/li>\n<li>\u4e0d\u4f7f\u7528%\u524d\u5bfc\u7684\u67e5\u8be2\uff0c\u5982like \u201c%ab\u201d<\/li>\n<\/ul>\n<ol start=\"4\">\n<li>\u4e0d\u4f7f\u7528\u8d1f\u5411\u67e5\u8be2\uff0c\u5982not in\/like<\/li>\n<\/ol>\n<ul>\n<li>\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\uff0c\u5bfc\u81f4\u5168\u8868\u626b\u63cf<\/li>\n<li>\u5168\u8868\u626b\u63cf\u5bfc\u81f4buffer pool\u5229\u7528\u7387\u964d\u4f4e<\/li>\n<\/ul>\n<ol start=\"5\">\n<li>\u907f\u514d\u4f7f\u7528\u5b58\u50a8\u8fc7\u7a0b\u3001\u89e6\u53d1\u5668\u3001UDF\u3001events\u7b49<\/li>\n<\/ol>\n<ul>\n<li>\u8ba9\u6570\u636e\u5e93\u505a\u6700\u64c5\u957f\u7684\u4e8b<\/li>\n<li>\u964d\u4f4e\u4e1a\u52a1\u8026\u5408\u5ea6\uff0c\u4e3asacle out\u3001sharding\u7559\u6709\u4f59\u5730<\/li>\n<li>\u907f\u5f00BUG<\/li>\n<\/ul>\n<ol start=\"6\">\n<li>\u907f\u514d\u4f7f\u7528\u5927\u8868\u7684JOIN<\/li>\n<\/ol>\n<ul>\n<li>MySQL\u6700\u64c5\u957f\u7684\u662f\u5355\u8868\u7684\u4e3b\u952e\/\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2<\/li>\n<li>JOIN\u6d88\u8017\u8f83\u591a\u5185\u5b58\uff0c\u4ea7\u751f\u4e34\u65f6\u8868<\/li>\n<\/ul>\n<ol start=\"7\">\n<li>\u907f\u514d\u5728\u6570\u636e\u5e93\u4e2d\u8fdb\u884c\u6570\u5b66\u8fd0\u7b97<\/li>\n<\/ol>\n<ul>\n<li>MySQL\u4e0d\u64c5\u957f\u6570\u5b66\u8fd0\u7b97\u548c\u903b\u8f91\u5224\u65ad<\/li>\n<li>\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15<\/li>\n<\/ul>\n<ol start=\"8\">\n<li>\u51cf\u5c11\u4e0e\u6570\u636e\u5e93\u7684\u4ea4\u4e92\u6b21\u6570<\/li>\n<\/ol>\n<ul>\n<li>INSERT \u2026 ON DUPLICATE KEY UPDATE<\/li>\n<li>REPLACE INTO\u3001INSERT IGNORE \u3001INSERT INTO VALUES(),(),()<\/li>\n<li>UPDATE \u2026 WHERE ID IN(10,20,50,\u2026)<\/li>\n<\/ul>\n<p>\u5408\u7406\u7684\u4f7f\u7528\u5206\u9875<\/p>\n<ul>\n<li>\u9650\u5236\u5206\u9875\u5c55\u793a\u7684\u9875\u6570<\/li>\n<li>\u53ea\u80fd\u70b9\u51fb\u4e0a\u4e00\u9875\u3001\u4e0b\u4e00\u9875<\/li>\n<li>\u91c7\u7528\u5ef6\u8fdf\u5173\u8054<\/li>\n<\/ul>\n<p><strong>\u5982\u4f55\u6b63\u786e\u7684\u4f7f\u7528\u5206\u9875\uff1f<\/strong><\/p>\n<p>\u5047\u5982\u6709\u7c7b\u4f3c\u4e0b\u9762\u5206\u9875\u8bed\u53e5\uff1aSELECT * FROM table  ORDER BY id LIMIT 10000, 10<br \/>\u7531\u4e8eMySQL\u91cc\u5bf9LIMIT OFFSET\u7684\u5904\u7406\u65b9\u5f0f\u662f\u53d6\u51faOFFSET+LIMIT\u7684\u6240\u6709\u6570\u636e\uff0c\u7136\u540e\u53bb\u6389OFFSET\uff0c\u8fd4\u56de\u5e95\u90e8\u7684LIMIT\u3002\u6240\u4ee5\uff0c\u5728OFFSET\u6570\u503c\u8f83\u5927\u65f6\uff0cMySQL\u7684\u67e5\u8be2\u6027\u80fd\u4f1a\u975e\u5e38\u4f4e\u3002\u53ef\u4ee5\u4f7f\u7528id &gt; n \u7684\u65b9\u5f0f\u8fdb\u884c\u89e3\u51b3\uff1a<br \/>\u4f7f\u7528id &gt; n \u7684\u65b9\u5f0f\u6709\u5c40\u9650\u6027\uff0c\u5bf9\u4e8eid\u4e0d\u8fde\u7eed\u7684\u95ee\u9898\uff0c\u53ef\u4ee5\u901a\u8fc7\u7ffb\u9875\u7684\u65f6\u5019\u540c\u65f6\u4f20\u5165\u6700\u540e\u4e00\u4e2aid\u65b9\u5f0f\u6765\u89e3\u51b3\u3002<\/p>\n<p><a href=\"http:\/\/example.com\/page.php?last=100\">http:\/\/example.com\/page.php?last=100<\/a><\/p>\n<p> select * from table where id&lt;100 order by id desc limit 10<\/p>\n<p>\/\/\u4e0a\u4e00\u9875<br \/><a href=\"http:\/\/example.com\/page.php?first=110\">http:\/\/example.com\/page.php?first=110<\/a><br \/>select * from table where id&gt;110 order by id desc limit 10<br \/>\u8fd9\u79cd\u65b9\u5f0f\u6bd4\u8f83\u5927\u7684\u7f3a\u70b9\u662f\uff0c\u5982\u679c\u5728\u6d4f\u89c8\u4e2d\u6709\u63d2\u5165\/\u5220\u9664\u64cd\u4f5c\uff0c\u7ffb\u9875\u4e0d\u4f1a\u66f4\u65b0\uff0c\u800c\u603b\u9875\u6570\u53ef\u80fd\u4ecd\u7136\u662f\u6839\u636e\u65b0\u7684count(*) \u6765\u8ba1\u7b97\uff0c\u6700\u7ec8\u53ef\u80fd\u4f1a\u4ea7\u751f\u67d0\u4e9b\u8bb0\u5f55\u8bbf\u95ee\u4e0d\u5230\u3002\u4e3a\u4e86\u4fee\u8865\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u7ee7\u7eed\u5f15\u5165\u5f53\u524d\u9875\u7801\u4ee5\u53ca\u5728\u4e0a\u6b21\u7ffb\u9875\u4ee5\u540e\u662f\u5426\u6709\u63d2\u5165\/\u5220\u9664\u7b49\u5f71\u54cd\u603b\u8bb0\u5f55\u6570\u7684\u64cd\u4f5c\u5e76\u8fdb\u884c\u7f13\u5b58<br \/>select * from table where id &gt;= (select id from table order by id limit #offset#, 1)<\/p>\n<ol start=\"9\">\n<li>\u62d2\u7edd\u5927SQL\uff0c\u62c6\u5206\u6210\u5c0fSQL<\/li>\n<\/ol>\n<ul>\n<li>\u5145\u5206\u5229\u7528QUERY CACHE<\/li>\n<li>\u5145\u5206\u5229\u7528\u591a\u6838CPU<\/li>\n<\/ul>\n<ol start=\"10\">\n<li>\n<p>\u4f7f\u7528in\u4ee3\u66ffor\uff0cin\u7684\u503c\u4e0d\u8d85\u8fc71000\u4e2a<\/p>\n<\/li>\n<li>\n<p>\u7981\u6b62\u4f7f\u7528order by rand()<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528EXPLAIN\u8bca\u65ad\uff0c\u907f\u514d\u751f\u6210\u4e34\u65f6\u8868<br \/>EXPLAIN\u8bed\u53e5\uff08\u5728MySQL\u5ba2\u6237\u7aef\u4e2d\u6267\u884c\uff09\u53ef\u4ee5\u83b7\u5f97MySQL\u5982\u4f55\u6267\u884cSELECT\u8bed\u53e5\u7684\u4fe1\u606f\u3002\u901a\u8fc7\u5bf9SELECT\u8bed\u53e5\u6267\u884cEXPLAIN\uff0c\u53ef\u4ee5\u77e5\u6653MySQL\u6267\u884c\u8be5SELECT\u8bed\u53e5\u65f6\u662f\u5426\u4f7f\u7528\u4e86\u7d22\u5f15\u3001\u5168\u8868\u626b\u63cf\u3001\u4e34\u65f6\u8868\u3001\u6392\u5e8f\u7b49\u4fe1\u606f\u3002\u5c3d\u91cf\u907f\u514dMySQL\u8fdb\u884c\u5168\u8868\u626b\u63cf\u3001\u4f7f\u7528\u4e34\u65f6\u8868\u3001\u6392\u5e8f\u7b49\u3002\u8be6\u89c1\u5b98\u65b9\u6587\u6863\u3002<\/p>\n<\/li>\n<li>\n<p>\u7528union all\u800c\u4e0d\u662funion<\/p>\n<\/li>\n<\/ol>\n<p><strong>union all\u4e0e union\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/strong><br \/>union\u548cunion all\u5173\u952e\u5b57\u90fd\u662f\u5c06\u4e24\u4e2a\u7ed3\u679c\u96c6\u5408\u5e76\u4e3a\u4e00\u4e2a\uff0c\u4f46\u8fd9\u4e24\u8005\u4ece\u4f7f\u7528\u548c\u6548\u7387\u4e0a\u6765\u8bf4\u90fd\u6709\u6240\u4e0d\u540c\u3002<br \/>union\u5728\u8fdb\u884c\u8868\u94fe\u63a5\u540e\u4f1a\u7b5b\u9009\u6389\u91cd\u590d\u7684\u8bb0\u5f55\uff0c\u6240\u4ee5\u5728\u8868\u94fe\u63a5\u540e\u4f1a\u5bf9\u6240\u4ea7\u751f\u7684\u7ed3\u679c\u96c6\u8fdb\u884c\u6392\u5e8f\u8fd0\u7b97\uff0c\u5220\u9664\u91cd\u590d\u7684\u8bb0\u5f55\u518d\u8fd4\u56de\u7ed3\u679c\u3002\u5982\uff1a<\/p>\n<p>select * from test_union1<br \/>union select * from test_union2<\/p>\n<p>\u8fd9\u4e2aSQL\u5728\u8fd0\u884c\u65f6\u5148\u53d6\u51fa\u4e24\u4e2a\u8868\u7684\u7ed3\u679c\uff0c\u518d\u7528\u6392\u5e8f\u7a7a\u95f4\u8fdb\u884c\u6392\u5e8f\u5220\u9664\u91cd\u590d\u7684\u8bb0\u5f55\uff0c\u6700\u540e\u8fd4\u56de\u7ed3\u679c\u96c6\uff0c\u5982\u679c\u8868\u6570\u636e\u91cf\u5927\u7684\u8bdd\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7528\u78c1\u76d8\u8fdb\u884c\u6392\u5e8f\u3002<br \/>\u800cunion all\u53ea\u662f\u7b80\u5355\u7684\u5c06\u4e24\u4e2a\u7ed3\u679c\u5408\u5e76\u540e\u5c31\u8fd4\u56de\u3002\u8fd9\u6837\uff0c\u5982\u679c\u8fd4\u56de\u7684\u4e24\u4e2a\u7ed3\u679c\u96c6\u4e2d\u6709\u91cd\u590d\u7684\u6570\u636e\uff0c\u90a3\u4e48\u8fd4\u56de\u7684\u7ed3\u679c\u96c6\u5c31\u4f1a\u5305\u542b\u91cd\u590d\u7684\u6570\u636e\u4e86\u3002<br \/>\u4ece\u6548\u7387\u4e0a\u8bf4\uff0cunion all\u8981\u6bd4union\u5feb\u5f88\u591a\uff0c\u6240\u4ee5\uff0c\u5982\u679c\u53ef\u4ee5\u786e\u8ba4\u5408\u5e76\u7684\u4e24\u4e2a\u7ed3\u679c\u96c6\u4e2d\u4e0d\u5305\u542b\u91cd\u590d\u7684\u6570\u636e\u7684\u8bdd\uff0c\u90a3\u4e48\u5c31\u4f7f\u7528union all\uff0c\u5982\u4e0b\uff1a<br \/> select * from test_union1  union all  select * from test_union2<\/p>\n<ol start=\"14\">\n<li>\n<p>\u7a0b\u5e8f\u5e94\u6709\u6355\u83b7SQL\u5f02\u5e38\u7684\u5904\u7406\u673a\u5236<\/p>\n<\/li>\n<li>\n<p>\u7981\u6b62\u5355\u6761SQL\u8bed\u53e5\u540c\u65f6\u66f4\u65b0\u591a\u4e2a\u8868<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u4f7f\u7528select * \uff0cSELECT\u8bed\u53e5\u53ea\u83b7\u53d6\u9700\u8981\u7684\u5b57\u6bb5<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li>\u6d88\u8017CPU\u548cIO\u3001\u6d88\u8017\u7f51\u7edc\u5e26\u5bbd<\/li>\n<li>\u65e0\u6cd5\u4f7f\u7528\u8986\u76d6\u7d22\u5f15<\/li>\n<li>\u51cf\u5c11\u8868\u7ed3\u6784\u53d8\u66f4\u5e26\u6765\u7684\u5f71\u54cd<\/li>\n<li>\u56e0\u4e3a\u5927\uff0cselect\/join \u53ef\u80fd\u751f\u6210\u4e34\u65f6\u8868<\/li>\n<\/ul>\n<ol start=\"17\">\n<li>\n<p>UPDATE\u3001DELETE\u8bed\u53e5\u4e0d\u4f7f\u7528LIMIT<\/p>\n<\/li>\n<li>\n<p>INSERT\u8bed\u53e5\u5fc5\u987b\u663e\u5f0f\u7684\u6307\u660e\u5b57\u6bb5\u540d\u79f0\uff0c\u4e0d\u4f7f\u7528INSERT INTO table()<\/p>\n<\/li>\n<li>\n<p>INSERT\u8bed\u53e5\u4f7f\u7528batch\u63d0\u4ea4\uff08INSERT INTO table VALUES(),(),()\u2026\u2026\uff09\uff0cvalues\u7684\u4e2a\u6570\u4e0d\u8d85\u8fc7500<\/p>\n<\/li>\n<li>\n<p>\u7edf\u8ba1\u8868\u4e2d\u8bb0\u5f55\u6570\u65f6\u4f7f\u7528COUNT(*)\uff0c\u800c\u4e0d\u662fCOUNT(primary_key)\u548cCOUNT(1) \u5907\u6ce8\uff1a\u4ec5\u9488\u5bf9Myisam<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u66f4\u65b0\u5efa\u8bae\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u5148\u67e5\u8be2\u51fa\u4e3b\u952e\uff0c\u518d\u6839\u636e\u4e3b\u952e\u8fdb\u884c\u6570\u636e\u66f4\u65b0<\/p>\n<\/li>\n<li>\n<p>\u7981\u6b62\u4f7f\u7528\u8de8\u5e93\u67e5\u8be2<\/p>\n<\/li>\n<li>\n<p>\u7981\u6b62\u4f7f\u7528\u5b50\u67e5\u8be2\uff0c\u5efa\u8bae\u5c06\u5b50\u67e5\u8be2\u8f6c\u6362\u6210\u5173\u8054\u67e5\u8be2<\/p>\n<\/li>\n<li>\n<p>\u9488\u5bf9varchar\u7c7b\u578b\u5b57\u6bb5\u7684\u7a0b\u5e8f\u5904\u7406\uff0c\u8bf7\u9a8c\u8bc1\u7528\u6237\u8f93\u5165\uff0c\u4e0d\u8981\u8d85\u51fa\u5176\u9884\u8bbe\u7684\u957f\u5ea6\uff1b<\/p>\n<\/li>\n<\/ol>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u5206\u8868\u89c4\u8303\" title=\"\u5206\u8868\u89c4\u8303\"><\/a>\u5206\u8868\u89c4\u8303<\/h3>\n<p>\u5355\u8868\u4e00\u5230\u4e24\u5e74\u5185\u6570\u636e\u91cf\u8d85\u8fc7500w\u6216\u6570\u636e\u5bb9\u91cf\u8d85\u8fc710G\u8003\u8651\u5206\u8868\uff0c\u9700\u63d0\u524d\u8003\u8651\u5386\u53f2\u6570\u636e\u8fc1\u79fb\u6216\u5e94\u7528\u81ea\u884c\u5220\u9664\u5386\u53f2\u6570\u636e\uff0c\u91c7\u7528\u7b49\u91cf\u5747\u8861\u5206\u8868\u6216\u6839\u636e\u4e1a\u52a1\u89c4\u5219\u5206\u8868\u5747\u53ef\u3002\u8981\u5206\u8868\u7684\u6570\u636e\u8868\u5fc5\u987b\u4e0eDBA\u5546\u91cf\u5206\u8868\u7b56\u7565<\/p>\n<ul>\n<li>\u7528HASH\u8fdb\u884c\u6563\u8868\uff0c\u8868\u540d\u540e\u7f00\u4f7f\u7528\u5341\u8fdb\u5236\u6570\uff0c\u4e0b\u6807\u4ece0\u5f00\u59cb<\/li>\n<li>\u6309\u65e5\u671f\u65f6\u95f4\u5206\u8868\u9700\u7b26\u5408YYYY[MM][dd][HH]\u683c\u5f0f<\/li>\n<li>\u91c7\u7528\u5408\u9002\u7684\u5206\u5e93\u5206\u8868\u7b56\u7565\u3002\u4f8b\u5982\u5343\u5e93\u5341\u8868\u3001\u5341\u5e93\u767e\u8868\u7b49<\/li>\n<li>\u7981\u6b62\u4f7f\u7528\u5206\u533a\u8868\uff0c\u5206\u533a\u8868\u5bf9\u5206\u533a\u952e\u6709\u4e25\u683c\u8981\uff0c\u5206\u533a\u8868\u5728\u8868\u53d8\u5927\u540e\u6267\u884cDDL\u3001SHARDING\u3001\u5355\u8868\u6062\u590d\u7b49\u90fd\u53d8\u5f97\u66f4\u52a0\u56f0\u96be\u3002<\/li>\n<li>\u62c6\u5206\u5927\u5b57\u6bb5\u548c\u8bbf\u95ee\u9891\u7387\u4f4e\u7684\u5b57\u6bb5\uff0c\u5206\u79bb\u51b7\u70ed\u6570\u636e<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u884c\u4e3a\u89c4\u8303\" title=\"\u884c\u4e3a\u89c4\u8303\"><\/a>\u884c\u4e3a\u89c4\u8303<\/h3>\n<ul>\n<li>\u6279\u91cf\u5bfc\u5165\u3001\u5bfc\u51fa\u6570\u636e\u5fc5\u987b\u63d0\u524d\u901a\u77e5DBA\u534f\u52a9\u89c2\u5bdf<\/li>\n<li>\u7981\u6b62\u5728\u7ebf\u4e0a\u4ece\u5e93\u6267\u884c\u540e\u53f0\u7ba1\u7406\u548c\u7edf\u8ba1\u7c7b\u67e5\u8be2<\/li>\n<li>\u7981\u6b62\u6709super\u6743\u9650\u7684\u5e94\u7528\u7a0b\u5e8f\u8d26\u53f7\u5b58\u5728<\/li>\n<li>\u4ea7\u54c1\u51fa\u73b0\u975e\u6570\u636e\u5e93\u5bfc\u81f4\u7684\u6545\u969c\u65f6\u53ca\u65f6\u901a\u77e5DBA\u534f\u52a9\u6392\u67e5<\/li>\n<li>\u63a8\u5e7f\u6d3b\u52a8\u6216\u4e0a\u7ebf\u65b0\u529f\u80fd\u5fc5\u987b\u63d0\u524d\u901a\u77e5DBA\u8fdb\u884c\u6d41\u91cf\u8bc4\u4f30<\/li>\n<li>\u6570\u636e\u5e93\u6570\u636e\u4e22\u5931\uff0c\u53ca\u65f6\u8054\u7cfbDBA\u8fdb\u884c\u6062\u590d<\/li>\n<li>\u5bf9\u5355\u8868\u7684\u591a\u6b21alter\u64cd\u4f5c\u5fc5\u987b\u5408\u5e76\u4e3a\u4e00\u6b21\u64cd\u4f5c<\/li>\n<li>\u4e0d\u5728MySQL\u6570\u636e\u5e93\u4e2d\u5b58\u653e\u4e1a\u52a1\u903b\u8f91<\/li>\n<li>\u91cd\u5927\u9879\u76ee\u7684\u6570\u636e\u5e93\u65b9\u6848\u9009\u578b\u548c\u8bbe\u8ba1\u5fc5\u987b\u63d0\u524d\u901a\u77e5DBA\u53c2\u4e0e<\/li>\n<li>\u5bf9\u7279\u522b\u91cd\u8981\u7684\u5e93\u8868\uff0c\u63d0\u524d\u4e0eDBA\u6c9f\u901a\u786e\u5b9a\u7ef4\u62a4\u548c\u5907\u4efd\u4f18\u5148\u7ea7<\/li>\n<li>\u4e0d\u5728\u4e1a\u52a1\u9ad8\u5cf0\u671f\u6279\u91cf\u66f4\u65b0\u3001\u67e5\u8be2\u6570\u636e\u5e93\u5176\u4ed6\u89c4\u8303<\/li>\n<li>\u63d0\u4ea4\u7ebf\u4e0a\u5efa\u8868\u6539\u8868\u9700\u6c42\uff0c\u5fc5\u987b\u8be6\u7ec6\u6ce8\u660e\u6240\u6709\u76f8\u5173SQL\u8bed\u53e5<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/www.studytime.xin\/article\/#\u5176\u4ed6\u89c4\u8303\" title=\"\u5176\u4ed6\u89c4\u8303\"><\/a>\u5176\u4ed6\u89c4\u8303<\/h3>\n<p>\u65e5\u5fd7\u7c7b\u6570\u636e\u4e0d\u5efa\u8bae\u5b58\u50a8\u5728MySQL\u4e0a\uff0c\u4f18\u5148\u8003\u8651<a href=\"http:\/\/hbase\/\">Hbase<\/a>\u6216OceanBase\uff0c\u5982\u9700\u8981\u5b58\u50a8\u8bf7\u627eDBA\u8bc4\u4f30\u4f7f\u7528\u538b\u7f29\u8868\u5b58\u50a8\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u6d89\u53ca\u6570\u636e\u5e93\u76f8\u5173\u64cd\u4f5c\u8f83\u591a\uff0c\u516c\u53f8\u73b0&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/131765"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=131765"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/131765\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=131765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=131765"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=131765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}