{"rsdb":{"rid":"395050","subhead":"","postdate":"0","aid":"272454","fid":"57","uid":"1","topic":"1","content":"

1.\u4f7f\u7528\u7d22\u5f15<\/span><\/strong><\/p>

\u3000\u3000\u4f7f\u7528\u7d22\u5f15\u65f6\uff0c\u5e94\u5c3d\u91cf\u907f\u514d\u5168\u8868\u626b\u63cf\uff0c\u9996\u5148\u5e94\u8003\u8651\u5728 where \u53ca order by \uff0cgroup by \u6d89\u53ca\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\u3002<\/span><\/p>

2.\u4f18\u5316SQL\u8bed\u53e5<\/span><\/strong><\/p>

\u3000<\/span>1\uff09\u5206\u6790\u67e5\u8be2\u8bed\u53e5\uff1a\u901a\u8fc7\u5bf9\u67e5\u8be2\u8bed\u53e5\u7684\u5206\u6790\uff0c\u53ef\u4ee5\u4e86\u89e3\u67e5\u8be2\u8bed\u53e5\u6267\u884c\u60c5\u51b5\uff0c\u627e\u51fa\u67e5\u8be2\u8bed\u53e5\u6267\u884c\u7684\u74f6\u9888\uff0c\u4ece\u800c\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u3002<\/span><\/p>

\u3000\u3000\u3000\u901a\u8fc7explain\uff08\u67e5\u8be2\u4f18\u5316\u795e\u5668\uff09\u7528\u6765\u67e5\u770bSQL\u8bed\u53e5\u7684\u6267\u884c\u7ed3\u679c\uff0c\u53ef\u4ee5\u5e2e\u52a9\u9009\u62e9\u66f4\u597d\u7684\u7d22\u5f15\u548c\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\uff0c\u5199\u51fa\u66f4\u597d\u7684\u4f18\u5316\u8bed\u53e5\u3002<\/span><\/p>

\u3000\u3000\u3000\u4f8b\u5982\uff1aexplain select * from news;<\/span><\/p>

\u30002\uff09\u4efb\u4f55\u5730\u65b9\u90fd\u4e0d\u8981\u4f7f\u7528select * from t \uff0c\u7528\u5177\u4f53\u7684\u5b57\u6bb5\u5217\u8868\u4ee3\u66ff\u201c*\u201d\uff0c\u4e0d\u8981\u8fd4\u56de\u7528\u4e0d\u5230\u7684\u4efb\u4f55\u5b57\u6bb5\u3002<\/span><\/p>

\u30003\uff09\u4e0d\u5728\u7d22\u5f15\u5217\u505a\u8fd0\u7b97\u6216\u8005\u4f7f\u7528\u51fd\u6570\u3002<\/span><\/p>

\u30004\uff09\u67e5\u8be2\u5c3d\u53ef\u80fd\u4f7f\u7528 limit \u51cf\u5c11\u8fd4\u56de\u7684\u884c\u6570\uff0c\u51cf\u5c11\u6570\u636e\u4f20\u8f93\u65f6\u95f4\u548c\u5e26\u5bbd\u6d6a\u8d39\u3002<\/span><\/p>

3.\u4f18\u5316\u6570\u636e\u5e93\u5bf9\u8c61<\/span><\/strong><\/p>

\u30001\uff09\u4f18\u5316\u8868\u7684\u6570\u636e\u7c7b\u578b<\/span><\/p>

\u3000\u3000\u4f7f\u7528 procedure analyse()\u51fd\u6570\u5bf9\u8868\u8fdb\u884c\u5206\u6790\uff0c\u8be5\u51fd\u6570\u53ef\u4ee5\u5bf9\u8868\u4e2d\u5217\u7684\u6570\u636e\u7c7b\u578b\u63d0\u51fa\u4f18\u5316\u5efa\u8bae\u3002\u8868\u6570\u636e\u7c7b\u578b\u7b2c\u4e00\u4e2a\u539f\u5219\u662f\uff1a\u4f7f\u7528\u80fd\u6b63\u786e\u5730\u8868\u793a\u548c\u5b58\u50a8\u6570\u636e\u7684\u6700\u77ed\u7c7b\u578b\u3002\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u5bf9\u78c1\u76d8\u7a7a\u95f4\u3001\u5185\u5b58\u3001CPU\u7f13\u5b58\u7684\u4f7f\u7528\u3002<\/span><\/p>

\u3000\u3000\u4f7f\u7528\u65b9\u6cd5\uff1aselect * from \u8868\u540d procedure analyse();<\/span><\/p>

\u30002\uff09\u5bf9\u8868\u8fdb\u884c\u62c6\u5206<\/span><\/p>

\u3000\u3000\u901a\u8fc7\u62c6\u5206\u8868\u53ef\u4ee5\u63d0\u9ad8\u8868\u7684\u8bbf\u95ee\u6548\u7387\u3002\u6709\u4e24\u79cd\u62c6\u5206\u65b9\u6cd5\uff1a<\/span><\/p>

\u3000\u3000a.\u5782\u76f4\u62c6\u5206\uff08\u6309\u7167\u529f\u80fd\u6a21\u5757\uff09<\/span><\/strong><\/span><\/p>

\u3000\u3000\u3000\u5c06\u8868\u6309\u7167\u529f\u80fd\u6a21\u5757\u3001\u5173\u7cfb\u5bc6\u5207\u7a0b\u5ea6\u5212\u5206\u51fa\u6765\uff0c\u90e8\u7f72\u5230\u4e0d\u540c\u7684\u5e93\u4e0a\u3002\u4f8b\u5982\uff1a\u6211\u4eec\u4f1a\u5efa\u7acb\u5b9a\u4e49\u6570\u636e\u5e93workDB\u3001\u5546\u54c1\u6570\u636e\u5e93payDB\u3001\u7528\u6237\u6570\u636e\u5e93userDB\u7b49\uff0c\u5206\u522b\u7528\u4e8e\u5b58\u50a8\u9879\u76ee\u6570\u636e\u5b9a\u4e49\u8868\u3001\u5546\u54c1\u5b9a\u4e49\u8868\u3001\u7528\u6237\u6570\u636e\u8868\u7b49\u3002<\/span><\/p>

\u3000\u3000\u3000\u628a\u4e3b\u952e\u548c\u4e00\u4e9b\u5217\u653e\u5728\u4e00\u4e2a\u8868\u4e2d\uff0c\u7136\u540e\u628a\u4e3b\u952e\u548c\u53e6\u5916\u7684\u5217\u653e\u5728\u96f6\u4e00\u4e2a\u8868\u4e2d\u3002\u5982\u679c\u4e00\u4e2a\u8868\u4e2d\u67d0\u4e9b\u5217\u5e38\u7528\uff0c\u800c\u53e6\u5916\u4e00\u4e2a\u4e9b\u4e0d\u5e38\u7528\uff0c\u5219\u53ef\u4ee5\u91c7\u7528\u5782\u76f4\u62c6\u5206\u3002<\/span><\/p>

            \"\"<\/span><\/p>

\u3000\u3000b.\u6c34\u5e73\u62c6\u5206\uff08\u6309\u7167\u89c4\u5219\u5212\u5206\u5b58\u50a8<\/span><\/strong><\/span>\uff09<\/span><\/strong><\/p>

\u3000\u3000\u3000\u5f53\u4e00\u4e2a\u8868\u4e2d\u7684\u6570\u636e\u91cf\u8fc7\u5927\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u8be5\u8868\u7684\u6570\u636e\u6309\u7167\u67d0\u79cd\u89c4\u5219\u8fdb\u884c\u5212\u5206\uff0c\u4f8b\u5982userID\u6563\u5217\uff0c\u7136\u540e\u5b58\u50a8\u5230\u591a\u4e2a\u7ed3\u6784\u76f8\u540c\u7684\u8868\u548c\u4e0d\u540c\u7684\u5e93\u4e2d\u3002<\/span><\/p>

\u3000\u3000\u3000\u6839\u636e\u4e00\u5217\u6216\u8005\u591a\u5217\u6570\u636e\u7684\u503c\u5427\u6570\u636e\u884c\u653e\u5230\u4e24\u4e2a\u72ec\u7acb\u7684\u8868\u4e2d\u3002<\/span><\/p>

\u3000\u3000\u3000\"\"<\/span><\/p>

\u30003\uff09\u4f7f\u7528\u4e2d\u95f4\u8868\u6765\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6<\/span><\/p>

\u3000\u3000\u521b\u5efa\u4e2d\u95f4\u8868\uff0c\u8868\u7ed3\u6784\u548c\u6e90\u8868\u7ed3\u6784\u5b8c\u5168\u76f8\u540c\uff0c\u8f6c\u79fb\u8981\u7edf\u8ba1\u7684\u6570\u636e\u5230\u4e2d\u95f4\u8868\uff0c\u7136\u540e\u5728\u4e2d\u95f4\u8868\u4e0a\u8fdb\u884c\u7edf\u8ba1\uff0c\u5f97\u51fa\u60f3\u8981\u7684\u7ed3\u679c\u3002
<\/span><\/p>

4.\u786c\u4ef6\u4f18\u5316<\/span><\/strong><\/p>

\u30001\uff09CPU\u4f18\u5316<\/span><\/p>

\u3000\u3000\u9009\u62e9\u591a\u6838\u548c\u4e3b\u9891\u9ad8\u7684CPU\u3002<\/span><\/p>

\u30002\uff09\u5185\u5b58\u7684\u4f18\u5316<\/span><\/p>

\u3000\u3000\u4f7f\u7528\u66f4\u5927\u7684\u5185\u5b58\u3002\u5c06\u5c3d\u91cf\u591a\u7684\u5185\u5b58\u5206\u914d\u7ed9MySQL\u505a\u7f13\u5b58\u3002<\/span><\/p>

\u30003\uff09\u78c1\u76d8I\/O\u7684\u4f18\u5316<\/span><\/p>

\u3000\u3000a.\u4f7f\u7528\u78c1\u76d8\u9635\u5217<\/span><\/p>

\u3000\u3000\u3000RAID 0\u6ca1\u6709\u6570\u636e\u5197\u4f59\uff0c\u6ca1\u6709\u6570\u636e\u6821\u9a8c\u7684\u78c1\u76d8\u9648\u5217\u3002\u5b9e\u73b0RAID 0\u81f3\u5c11\u9700\u8981\u4e24\u5757\u4ee5\u4e0a\u7684\u786c\u76d8\uff0c\u5b83\u5c06\u4e24\u5757\u4ee5\u4e0a\u7684\u786c\u76d8\u5408\u5e76\u6210\u4e00\u5757\uff0c\u6570\u636e\u8fde\u7eed\u5730\u5206\u5272\u5728\u6bcf\u5757\u76d8\u4e0a\u3002<\/span><\/p>

\u3000\u3000\u3000RAID 1\u662f\u5c06\u4e00\u4e2a\u4e24\u5757\u786c\u76d8\u6240\u6784\u6210RAID\u786c\u76d8\u9635\u5217\uff0c\u5176\u5bb9\u91cf\u4ec5\u7b49\u4e8e\u4e00\u5757\u786c\u76d8\u7684\u5bb9\u91cf\uff0c\u56e0\u4e3a\u53e6\u4e00\u5757\u53ea\u662f\u5f53\u4f5c\u6570\u636e\u201c\u955c\u50cf\u201d\u3002<\/span><\/p>

\u3000\u3000\u3000\u4f7f\u7528RAID-0+1\u78c1\u76d8\u9635\u5217\u3002RAID 0+1\u662fRAID 0\u548cRAID 1\u7684\u7ec4\u5408\u5f62\u5f0f\u3002\u5b83\u5728\u63d0\u4f9b\u4e0eRAID 1\u4e00\u6837\u7684\u6570\u636e\u5b89\u5168\u4fdd\u969c\u7684\u540c\u65f6\uff0c\u4e5f\u63d0\u4f9b\u4e86\u4e0eRAID 1\u8fd1\u4f3c\u7684\u5b58\u50a8\u6027\u80fd\u3002<\/span><\/p>

\u3000\u3000b.\u8c03\u6574\u78c1\u76d8\u8c03\u5ea6\u7b97\u6cd5<\/span><\/p>

\u3000\u3000\u3000\u9009\u62e9\u5408\u9002\u7684\u78c1\u76d8\u8c03\u5ea6\u7b97\u6cd5\uff0c\u53ef\u4ee5\u51cf\u5c11\u78c1\u76d8\u7684\u5bfb\u9053\u65f6\u95f4\u3002<\/span><\/p>

5.MySQL\u81ea\u8eab\u7684\u4f18\u5316<\/span><\/strong><\/p>

\u3000\u3000\u5bf9MySQL\u81ea\u8eab\u7684\u4f18\u5316\u4e3b\u8981\u662f\u5bf9\u5176\u914d\u7f6e\u6587\u4ef6my.cnf\u4e2d\u7684\u5404\u9879\u53c2\u6570\u8fdb\u884c\u4f18\u5316\u8c03\u6574\u3002\u5982\u6307\u5b9aMySQL\u67e5\u8be2\u7f13\u51b2\u533a\u7684\u5927\u5c0f\uff0c\u6307\u5b9aMySQL\u5141\u8bb8\u7684\u6700\u5927\u8fde\u63a5\u8fdb\u7a0b\u6570\u7b49\u3002<\/span><\/p>

6.\u5e94\u7528\u4f18\u5316<\/span><\/strong><\/p>

\u30001\uff09\u4f7f\u7528\u6570\u636e\u5e93\u8fde\u63a5\u6c60<\/span><\/p>

\u30002\uff09\u5b9e\u7528\u67e5\u8be2\u7f13\u5b58<\/span><\/p>

\u3000\u3000\u5b83\u7684\u4f5c\u7528\u662f\u5b58\u50a8 select \u67e5\u8be2\u7684\u6587\u672c\u53ca\u5176\u76f8\u5e94\u7ed3\u679c\u3002\u5982\u679c\u968f\u540e\u6536\u5230\u4e00\u4e2a\u76f8\u540c\u7684\u67e5\u8be2\uff0c\u670d\u52a1\u5668\u4f1a\u4ece\u67e5\u8be2\u7f13\u5b58\u4e2d\u76f4\u63a5\u5f97\u5230\u67e5\u8be2\u7ed3\u679c\u3002\u67e5\u8be2\u7f13\u5b58\u9002\u7528\u7684\u5bf9\u8c61\u662f\u66f4\u65b0\u4e0d\u9891\u7e41\u7684\u8868\uff0c\u5f53\u8868\u4e2d\u6570\u636e\u66f4\u6539\u540e\uff0c\u67e5\u8be2\u7f13\u5b58\u4e2d\u7684\u76f8\u5173\u6761\u76ee\u5c31\u4f1a\u88ab\u6e05\u7a7a\u3002 <\/span><\/p>","orderid":"0","title":"MySQL\u4f18\u5316\u67e5\u8be2\u7684\u65b9\u6cd5","smalltitle":"","mid":"0","fname":"\u6570\u636e\u5e93\u7f16\u7a0b","special_id":"0","bak_id":"0","info":"0","hits":"259","pages":"1","comments":"0","posttime":"2023-07-26 08:18:10","list":"1690330690","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"MySQL<\/A> \u67e5\u8be2\u7684<\/A> \u65b9\u6cd5<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"119.59.235.169","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"MySQL\u4f18\u5316\u67e5\u8be2\u7684\u65b9\u6cd5","lastview":"1714909689","digg_num":"0","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}