![\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b](\"https:\/\/img-blog.csdnimg.cn\/img_convert\/5623434fe94723d38284f41293541a9e.png\" "\\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b")
<\/p>\n\u6b22\u8fce\u6765\u5230\u3010\u7ed8\u7a7a\u4e8bJ\u3011\u5b66\u4e60\u5c4b\uff5e<\/p>\n
<\/p>\n
\u90a3\u4e48\uff5e\u9762\u7801\u85cf\u597d\u4e86\u5417\uff1f<\/p>\n
<\/p>\n
\u5feb\u6765\u542c\u6211\u8bb2\u8bb2\u90a3\u4e9b\u5e74\u6211\u4eec\u4ecd\u7136\u672a\u5b66\u4f1a\u7684MYSQL\u77e5\u8bc6\uff01<\/p>\n
<\/p>\n
\u57fa\u7840\u7684CRUD\u76f8\u4fe1\u5404\u4f4d\u540c\u5b66\u5df2\u7ecf\u518d\u719f\u7ec3\u4e0d\u8fc7\u4e86\uff5e<\/p>\n
<\/p>\n
\u6570\u636e\u5e93\u7684\u4e8b\u52a1ACID\u7279\u6027\u3001\u9694\u79bb\u7ea7\u522b\u5e94\u8be5\u5df2\u7ecf\u5012\u80cc\u5982\u6d41\u4e86\u5427<\/p>\n
<\/p>\n
\u90a3\u4e48\u4eca\u5929\u6211\u6765\u5206\u4eab\u4e00\u4e0b\u4e00\u4e9b\u5f00\u53d1\u5e73\u65f6\u5f88\u5c11\u5173\u6ce8\u7684MYSQL\u77e5\u8bc6\u70b9\u3002<\/p>\n
<\/p>\n
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<\/p>\n
<\/p>\n
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1.M<\/strong>Y<\/strong>SQL<\/strong>\u670d\u52a1\u5668\u903b\u8f91\u67b6\u6784\u56fe<\/strong><\/p>\n <\/p>\n \uff08MYSQL\u4e09\u5c42\u67b6\u6784\uff09<\/p>\n <\/p>\n \u7b2c\u4e00\u5c42\uff1a\u6700\u4e0a\u5c42\u7684\u670d\u52a1\u5668\u4e0d\u662fMYSQL\u6240\u72ec\u6709\u7684\uff0c\u5927\u591a\u6570\u57fa\u4e8e\u7f51\u7edc\u7684\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u5de5\u5177\u6216\u8005\u670d\u52a1\u90fd\u6709\u7c7b\u4f3c\u7684\u7cfb\u7edf\u3002\u6bd4\u5982\u94fe\u63a5\u5904\u7406\uff0c\u6388\u6743\u8ba4\u8bc1\uff0c\u5b89\u5168<\/strong>\u7b49\u7b49\u3002<\/p>\n <\/p>\n \u7b2c\u4e8c\u5c42\uff1a\u5927\u591a\u6570\u7684MYSQL\u7684\u6838\u5fc3\u670d\u52a1\u529f\u80fd\u90fd\u5728\u8fd9\u4e00\u5c42\uff0c\u5305\u62ec\u67e5\u8be2\u89e3\u6790\u3001\u5206\u6790\u3001\u4f18\u5316\u3001\u7f13\u5b58<\/strong>\u4ee5\u53ca\u6240\u6709\u7684\u5185\u7f6e\u51fd\u6570\uff08\u4f8b\u5982\uff1a\u65e5\u671f\uff0c\u65f6\u95f4\uff0c\u6570\u5b66\u548c\u52a0\u5bc6\u51fd\u6570\u7b49\uff09\u3002\u6240\u6709\u8de8\u5b58\u50a8\u5f15\u64ce\u7684\u529f\u80fd\u90fd\u5728\u8fd9\u4e00\u5c42\u5b9e\u73b0\uff1a\u5b58\u50a8\u8fc7\u7a0b\uff0c\u89e6\u53d1\u5668\uff0c\u89c6\u56fe<\/strong>\u3002<\/p>\n <\/p>\n 1.\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u6761\u67e5\u8be2\u7ed9\u670d\u52a1\u5668<\/p>\n 2.\u670d\u52a1\u5668\u5148\u68c0\u67e5\u7f13\u5b58\uff0c\u5982\u679c\u547d\u4e2d\u7f13\u5b58\uff0c\u5219\u7acb\u5373\u8fd4\u56de\uff08\u53ef\u4ee5\u8bbe\u7f6e\u7f13\u5b58\u5f00\u5173,\u66f4\u65b0\/\u547d\u4e2d1:3\u53ef\u5f00\uff09<\/p>\n 3.\u670d\u52a1\u5668\u7aef\u8fdb\u884cSQL\u89e3\u6790\u3001\u9884\u5904\u7406\u3001\u518d\u7531\u4f18\u5316\u5668\u751f\u6210\u5bf9\u5e94\u6267\u884c\u8ba1\u5212\uff08\u5305\u62ec\u91cd\u5199\u67e5\u8be2\uff0c\u51b3\u5b9a\u8868\u7684\u8bfb\u53d6\u987a\u5e8f\uff0c\u4ee5\u53ca\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7b49\uff09\u3002<\/p>\n 4.MYSQL\u6839\u636e\u4f18\u5316\u5668\u751f\u6210\u6267\u884c\u8ba1\u5212\uff0c\u8c03\u7528\u5b58\u50a8\u5f15\u64ce\u5bf9\u5e94\u6267\u884c\u8ba1\u5212\u3002<\/p>\n 5.\u8fd4\u56de\u7ed9\u5ba2\u6237<\/p>\n <\/p>\n \u7b2c\u4e09\u5c42\uff1a\u5305\u542b\u4e86\u5b58\u50a8\u5f15\u64ce<\/strong>\u3002\u5b58\u50a8\u5f15\u64ce\u8d1f\u8d23MYSQL\u4e2d\u7684\u6570\u636e\u5b58\u50a8\u548c\u63d0\u53d6\u3002\u670d\u52a1\u5668\u901a\u8fc7API\u548c\u5b58\u50a8\u5f15\u64ce\u8fdb\u884c\u901a\u4fe1\uff0c\u8fd9\u4e9b\u63a5\u53e3\u5c4f\u853d\u4e86\u4e0d\u540c\u5b58\u50a8\u5f15\u64ce\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u4f7f\u5f97\u8fd9\u4e9b\u5dee\u5f02\u5bf9\u4e0a\u5c42\u7684\u67e5\u8be2\u8fc7\u7a0b\u900f\u660e\u3002\u5b58\u50a8\u5f15\u64ceAPI\u5305\u542b\u4e86\u51e0\u5341\u4e2a\u5e95\u5c42\u51fd\u6570\uff0c\u7528\u4e8e\u6267\u884c\u8bf8\u5982\u201d\u5f00\u59cb\u4e00\u4e2a\u4e8b\u52a1\u201c\u6216\u8005\u201d\u6839\u636e\u4e3b\u952e\u63d0\u53d6\u4e00\u884c\u8bb0\u5f55\u201c\u7b49\u64cd\u4f5c\u3002\u4f46\u5b58\u50a8\u5f15\u64ce\u4e0d\u4f1a\u53bb\u89e3\u6790SQL(INNODB\u662f\u4e00\u4e2a\u4f8b\u5916\uff0c\u5b83\u4f1a\u89e3\u6790\u5916\u952e\u5b9a\u4e49\uff0c\u56e0\u4e3aMYSQL\u670d\u52a1\u5668\u672c\u8eab\u6ca1\u6709\u5b9e\u73b0\u8be5\u529f\u80fd)<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n 2.\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236MVCC<\/strong> <\/strong>\u4e0e<\/strong> <\/strong>MYSQL\u4e8b\u52a1<\/strong><\/p>\n <\/p>\n INNODB\u91c7\u7528MVCC\u6765\u652f\u6301\u9ad8\u5e76\u53d1\uff0c\u5e76\u5b9e\u73b0\u4e864\u4e2a\u6807\u51c6\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5e76\u901a\u8fc7\u95f4\u9699\u9501<\/strong>\u7b56\u7565\u9632\u6b62\u5e7b\u8bfb\u3002\u95f4\u9699\u9501\u4e0d\u4ec5\u4ec5\u9501\u5b9a\u67e5\u8be2\u6d89\u53ca\u7684\u884c\uff0c\u8fd8\u5bf9\u7d22\u5f15\u95f4\u9699\u8fdb\u884c\u9501\u5b9a\uff0c\u9632\u6b62\u5e7b\u8bfb\u3002<\/p>\n <\/p>\n \u5b9e\u73b0\u7b56\u7565<\/strong>\uff1a<\/strong><\/p>\n \u901a\u8fc7\u589e\u52a0\u3010\u521b\u5efa\u7248\u672c\u53f7\u3011create_no\u3001\u3010\u8fc7\u671f\u7248\u672c\u53f7\u3011expired_no<\/p>\n \u7248\u672c\u53f7\u4e3a\u81ea\u589e\u5e8f\u5217\uff0c\u6bcf\u6b21\u589e\u5220\u6539\u90fd\u4f1a\u81ea\u589e1\u3002<\/p>\n <\/p>\n (\u7b80\u5355\u8868\u8bbe\u8ba1\u65b9\u6848)<\/p>\n <\/p>\n SELECT<\/strong>:\u6839\u636e2\u4e2a\u6761\u4ef6\u9009\u53d6\u67d0\u4e2a\u7248\u672c\u53f7\uff08x=7\uff09\u4e2d\u5b58\u6d3b\u7684\u6570\u636e\u3002<\/p>\n (1)\u521b\u5efa\u65f6\u95f4\u5c0f\u4e8e\u7b49\u4e8e\u5f53\u524d\u7248\u672c\u53f7(x)<\/p>\n (2)\u8fc7\u671f\u65f6\u95f4\u4e3a\u7a7a\u6216\u8005\u5927\u4e8e\u5f53\u524d\u7248\u672c\u53f7\uff08x\uff09<\/p>\n select * from MVCC t where t.create_no<=7 and (t.expired_no is null or t.expired_no>7);<\/p>\n INSERT<\/strong>:\u4e3a\u65b0\u63d2\u5165\u7684\u6bcf\u4e00\u884c\u7684\u3010\u521b\u5efa\u7248\u672c\u53f7\u3011\u4fdd\u5b58\u5f53\u524d\u7cfb\u7edf\u7684\u7248\u672c\u53f7.<\/p>\n DELETE<\/strong>:\u4e3a\u5220\u9664\u7684\u6bcf\u4e00\u884c\u7684\u3010\u8fc7\u671f\u7248\u672c\u53f7\u3011\u66f4\u65b0\u5f53\u524d\u7cfb\u7edf\u7248\u672c\u53f7\u3002<\/p>\n UPDATE<\/strong>:\u66f4\u65b0\u6570\u636e<\/p>\n (1)\u63d2\u5165\u4e00\u6761\u65b0\u7684\u6570\u636e\uff0c\u4e3a\u3010\u521b\u5efa\u7248\u672c\u53f7\u3011\u8bbe\u7f6e\u7248\u672c\u53f7\u3002<\/p>\n (2)\u66f4\u65b0\u4e0a\u4e00\u6761\u3010\u8fc7\u671f\u7248\u672c\u53f7\u3011\u4e3a\u7a7a\u7684\u6570\u636e\uff0c\u8bbe\u7f6e\u8fc7\u671f\u7248\u672c\u53f7\u3002<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n 3.\u8303\u5f0f\u4e0e\u53cd\u8303\u5f0f<\/strong><\/p>\n \u7b2c\u4e00\u8303\u5f0f<\/strong>1<\/strong>NF<\/strong>\uff1a<\/strong><\/p>\n \u6240\u6709\u57df\u90fd\u662f\u539f\u5b50\u6027\u7684\uff0c\u5373\u6570\u636e\u5e93\u6bcf\u4e00\u5217\u90fd\u662f\u4e0d\u53ef\u5206\u5272\u539f\u5b50\u6027\u7684\u3002\u53731NF\u5c31\u662f\u65e0\u91cd\u590d\u7684\u57df\u3002<\/p>\n \u793a\u8303\u6848\u4f8b\uff1a<\/p>\n \u5458\u5de5\u4e3b\u952e<\/p>\n<\/td>\n \u6027\u522b<\/p>\n<\/td>\n \u7537\u6027<\/p>\n<\/td>\n \u5973\u6027<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n \u7b2c\u4e8c\u8303\u5f0f<\/strong>2<\/strong>NF<\/strong>\uff1a<\/strong><\/p>\n \u57281NF\u7684\u57fa\u7840\u4e0a\uff0c\u8981\u6c42\u5b9e\u4f53\u5c5e\u6027\u5b8c\u5168\u4f9d\u8d56\u4e8e\u5173\u952e\u5b57\u3002<\/p>\n \u5373col\u5b8c\u5168\u4f9d\u8d56\u4e8e\u4e3b\u952e\uff0c\u6709\u4e00\u4e2a\u552f\u4e00\u6807\u8bc6\uff0c\u5982\u679c\u4ec5\u4ec5\u53ea\u662f\u90e8\u5206\u4f9d\u8d56\uff0c\u5219\u5e94\u8be5\u5206\u79bb\u51fa\u65b0\u7684\u5b9e\u4f53\u3002<\/p>\n \u4f8b\u5982\uff0c\u5728\u7528\u8bc1\u4ef6\u53f7\u5173\u8054\u7528\u6237\u8eab\u4efd\u4fe1\u606f\u65f6\uff0c\u5e94\u8be5\u7528\u8bc1\u4ef6\u53f7\u800c\u4e0d\u5e94\u8be5\u7528\u59d3\u540d\u3002<\/p>\n \u6b63\u786e\u793a\u8303\uff1a<\/p>\n \u8bc1\u4ef6\u53f7\uff08\u4e3b\u952e\uff09<\/p>\n<\/td>\n \u59d3\u540d<\/p>\n<\/td>\n \u5e74\u9f84<\/p>\n<\/td>\n \u6027\u522b<\/p>\n<\/td>\n \u7c4d\u8d2f<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u9519\u8bef\u793a\u8303\uff1a<\/p>\n \u59d3\u540d\uff08\u4e3b\u952e\uff09<\/p>\n<\/td>\n \u8bc1\u4ef6\u53f7<\/p>\n<\/td>\n \u5e74\u9f84<\/p>\n<\/td>\n \u6027\u522b<\/p>\n<\/td>\n \u7c4d\u8d2f<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n \u7b2c\u4e09\u8303\u5f0f<\/strong>3<\/strong>NF<\/strong>\uff1a<\/strong><\/p>\n \u57282NF\u7684\u57fa\u7840\u4e0a\uff0c\u4efb\u4f55\u975e\u4e3b\u5c5e\u6027\u4e0d\u4f9d\u8d56\u4e8e\u5176\u4ed6\u975e\u4e3b\u5c5e\u6027\u3002<\/p>\n \u4f8b\u5982\uff0c\u5b58\u5728\u4e00\u4e2a\u90e8\u95e8\u4fe1\u606f\u8868\uff0c\u5176\u4e2d\u6bcf\u4e2a\u90e8\u95e8\u6709\u90e8\u95e8\u7f16\u53f7\u3001\u90e8\u95e8\u540d\u79f0\u3001\u90e8\u95e8\u7b80\u4ecb\u7b49\u4fe1\u606f\u3002\u90a3\u4e48\u5728\u5458\u5de5\u4fe1\u606f\u8868\u4e2d\u5217\u51fa\u90e8\u95e8\u7f16\u53f7\u540e\u5c31\u4e0d\u80fd\u518d\u5c06\u90e8\u95e8\u540d\u79f0\u3001\u90e8\u95e8\u7b80\u4ecb\u7b49\u4e0e\u90e8\u95e8\u6709\u5173\u7684\u4fe1\u606f\u518d\u52a0\u5165\u5458\u5de5\u4fe1\u606f\u8868\u4e2d\u3002<\/p>\n \u793a\u8303\u6848\u4f8b\uff1a<\/p>\n \u5458\u5de5\u4e3b\u952e<\/p>\n<\/td>\n \u5458\u5de5\u5e74\u9f84<\/p>\n<\/td>\n \u5458\u5de5\u6027\u522b<\/p>\n<\/td>\n \u4e3b\u90e8id<\/p>\n<\/td>\n \u4e3b\u90e8\u95e8<\/p>\n<\/td>\n \u6b21\u90e8\u95e8<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n \u5df4\u65af<\/strong>-<\/strong>\u79d1\u5fb7\u8303\u5f0fBCNF<\/strong>\uff1a<\/strong><\/p>\n \u57283NF\u7684\u57fa\u7840\u4e0a\uff0c\u4efb\u4f55\u975e\u4e3b\u5c5e\u6027\u4e0d\u80fd\u5bf9\u4e3b\u952e\u5b50\u96c6\u4f9d\u8d56\uff08\u57283NF\u57fa\u7840\u4e0a\u6d88\u9664\u5bf9\u4e3b\u7801\u5b50\u96c6\u4f9d\u8d56\uff09<\/p>\n \u4f8b\u5982\uff0c\u573a\u666f\u4e00\u4e2a\u4ed3\u5e93\u53ef\u4ee5\u6709\u591a\u4e2a\u7ba1\u7406\u5458\uff0c\u591a\u4e2a\u5b58\u50a8\u7269\u54c1\uff0c\u6bcf\u4e2a\u5b58\u50a8\u7269\u54c1\u6709\u5bf9\u5e94\u6570\u91cf\u3002<\/p>\n \u9519\u8bef\u793a\u8303\uff1a\u6d88\u9664\u5b50\u5217\u5bf9\u4e3b\u952e\u7684\u4f9d\u8d56<\/p>\n \u4ed3\u5e93\u53f71<\/p>\n<\/td>\n \u7ba1\u7406\u5458A<\/p>\n<\/td>\n \u8d27\u7269A<\/p>\n<\/td>\n 10<\/p>\n<\/td>\n<\/tr>\n \u4ed3\u5e93\u53f71<\/p>\n<\/td>\n \u7ba1\u7406\u5458A<\/p>\n<\/td>\n \u8d27\u7269B<\/p>\n<\/td>\n 5<\/p>\n<\/td>\n<\/tr>\n \u4ed3\u5e93\u53f72<\/p>\n<\/td>\n \u7ba1\u7406\u5458B<\/p>\n<\/td>\n \u8d27\u7269C<\/p>\n<\/td>\n 10<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u6b63\u786e\u793a\u8303\uff1a<\/p>\n \u4ed3\u5e93\u53f71<\/p>\n<\/td>\n \u7ba1\u7406\u5458A<\/p>\n<\/td>\n<\/tr>\n \u4ed3\u5e93\u53f72<\/p>\n<\/td>\n \u7ba1\u7406\u5458B<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n \u4ed3\u5e93\u53f71<\/p>\n<\/td>\n \u8d27\u7269A<\/p>\n<\/td>\n 10<\/p>\n<\/td>\n<\/tr>\n \u4ed3\u5e93\u53f71<\/p>\n<\/td>\n \u8d27\u7269B<\/p>\n<\/td>\n 5<\/p>\n<\/td>\n<\/tr>\n \u4ed3\u5e93\u53f72<\/p>\n<\/td>\n \u8d27\u7269C<\/p>\n<\/td>\n 10<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n \u7b2c\u56db\u8303\u5f0f<\/strong>4<\/strong>NF<\/strong>\uff1a<\/strong><\/p>\n \u57283NF\uff0cBCNF\u57fa\u7840\u4e0b\u975e\u4e3b\u5c5e\u6027\u7684\uff0c\u5019\u9009\u952e\u53ea\u80fd\u5b58\u5728\u4e0d\u8d85\u8fc71\u4e2a\u591a\u503c\u5c5e\u6027\u3002\u8981\u6c42\u628a\u540c\u4e00\u8868\u5185\u7684\u591a\u5bf9\u591a\u5173\u7cfb\u5220\u9664\u3002<\/p>\n \u4ed3\u5e93\u53f7<\/p>\n<\/td>\n \u7ba1\u7406\u5458id<\/p>\n<\/td>\n \u7ba1\u7406\u5458\u540d\u79f0<\/p>\n<\/td>\n \u8d27\u7269id<\/p>\n<\/td>\n \u8d27\u7269\u540d\u79f0<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n <\/p>\n <\/p>\n \u8303\u5f0f\u4f18\u70b9<\/strong>\uff1a<\/strong><\/p>\n 1.\u8303\u5f0f\u7684\u66f4\u65b0\u64cd\u4f5c\u901a\u5e38\u6bd4\u53cd\u8303\u5f0f\u5feb<\/p>\n 2.\u6709\u8f83\u5c11\u7684\u91cd\u590d\u6570\u636e\uff0c\u66f4\u65b0\u64cd\u4f5c\u7684\u6548\u7387\u66f4\u9ad8<\/p>\n 3.\u8868\u5185\u5b58\u5360\u7a7a\u95f4\u66f4\u5c0f<\/p>\n 4.\u8f83\u5c11\u7684\u4f7f\u7528distinct\u548cgroupby<\/p>\n <\/p>\n \u53cd\u8303\u5f0f\u4f18\u70b9<\/strong>\uff1a<\/strong><\/p>\n 1.\u6570\u636e\u90fd\u5728\u540c\u4e00\u5f20\u8868\u4e2d\uff0c\u53ef\u4ee5\u907f\u514d\u5173\u8054\uff0c\u67e5\u8be2\u66f4\u6548\u7387<\/p>\n <\/p>\n \u6df7\u7528\u8303\u5f0f\u8bbe\u8ba1<\/strong>\uff1a<\/strong><\/p>\n 1.\u6700\u5e38\u7528\u7684\u53cd\u8303\u5f0f\u5316\u7684schema\u662f\u590d\u5236\u6216\u8005\u7f13\u5b58\uff0c\u5229\u7528\u89e6\u53d1\u5668\u540c\u6b65\u66f4\u65b0\u5176\u4ed6\u8868\u5b57\u6bb5<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n 4.MYSQL\u5206\u533a<\/strong>\u3001<\/strong>\u5206\u8868<\/strong><\/p>\n <\/p>\n \u5206\u533a<\/strong>\u3001<\/strong>\u5206\u8868<\/strong>\u3001<\/strong>\u5206\u5e93\u533a\u522b<\/strong>\uff1a<\/strong><\/p>\n \u5206\u533a\u3001\u5206\u8868\u3001\u5206\u5e93\u90fd\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u6570\u636e\u5e93\u8bfb\u7684\u6027\u80fd\u3002<\/p>\n<\/li>\n \u6570\u636e\u5e93\u5206\u5e93\u53ef\u4ee5\u63d0\u5347\u5e76\u53d1\u5199\u7684\u901f\u5ea6\uff1a\u901a\u8fc7\u7b80\u5355\u66b4\u529b\u7684\u7269\u7406\u65b9\u5f0f\u62c6\u5206\u529f\u80fd<\/p>\n<\/li>\n \u5206\u533a\u6700\u7b80\u5355\uff0c\u7531\u6570\u636e\u5e93\u81ea\u8eab\u7ef4\u62a4\u6570\u636e\u5173\u7cfb\uff1b\u5206\u8868\u590d\u6742\uff0c\u9700\u8981\u5f00\u53d1\u4eba\u5458\u6307\u5b9a\u6570\u636e\u8bfb\u5199\u5728\u54ea\u5f20\u5b50\u8868\uff1b\u5206\u5e93\u6700\u590d\u6742\uff0c\u9664\u4e86\u4e3a\u5bf9\u5e94\u7684\u6570\u636e\u9009\u62e9\u5bf9\u5e94\u7684\u6570\u636e\u5e93\u4ee5\u5916\uff0c\u8fd8\u9700\u8981\u89e3\u51b3\u8de8\u5e93\u7684\u5206\u5e03\u5f0f\u4e8b\u52a1\u95ee\u9898<\/p>\n<\/li>\n<\/ul>\n <\/p>\n \u5206\u533a\u3001\u5206\u8868\u3001\u5206\u5e93\u5e76\u4e0d\u51b2\u7a81\uff0c\u6bd4\u5982\u5728 \u8bfb\u5199\u5206\u79bb\u7684\u4e1a\u52a1\u573a\u666f\uff0c\u5bf9\u8bfb\u7684\u6570\u636e\u5e93\u7684\u67d0\u4e9b\u8868\u8fdb\u884c\u5206\u533a\u6216\u8005\u5206\u8868\u3002\u6216\u8005\u5bf9\u4e8e\u4e00\u4e9b\u5bb9\u6613\u7f16\u7a0b\u7684\u8868\u7528\u5206\u8868\uff0c\u7f16\u7a0b\u590d\u6742\u7684\u4e1a\u52a1\u7528\u5206\u533a\uff0c\u90fd\u662f\u53ef\u884c\u7684<\/p>\n <\/p>\n \u5206\u533a\u8be6\u89e3<\/strong>\uff1a<\/strong><\/p>\n <\/p>\n \u5bf9\u7528\u6237\u6765\u8bf4\uff0c\u5206\u533a\u8868\u5c31\u662f\u4e00\u4e2a\u72ec\u4e00\u7684\u903b\u8f91\u8868\uff0c\u4f46\u662f\u5e95\u5c42\u7531\u591a\u4e2a\u7269\u7406\u5b57\u8868\u7ec4\u6210\u3002\u5b9e\u73b0\u5206\u533a\u7684\u4ee3\u7801\u5b9e\u9645\u4e0a\u662f\u5bf9\u4e00\u7ec4\u5e95\u5c42\u8868\u7684\u53e5\u67c4\u5bf9\u8c61\u7684\u5c01\u88c5\u3002\u5bf9\u5206\u533a\u8868\u7684\u8bf7\u6c42\uff0c\u90fd\u4f1a\u901a\u8fc7\u53e5\u67c4\u5bf9\u8c61\u8f6c\u5316\u6210\u5bf9\u5b58\u50a8\u5f15\u64ce\u7684\u63a5\u53e3\u3002\u6240\u4ee5\u5206\u533a\u5bf9SQL\u5c42\u9762\u662f\u4e00\u4e2a\u5b8c\u5168\u5c01\u88c5\u7684\u9ed1\u76d2\u3002<\/p>\n <\/p>\n \u5728\u6570\u636e\u91cf\u8d85\u5927\u7684\u65f6\u5019\uff0cB-Tree\u7d22\u5f15\u5c31\u65e0\u6cd5\u8d77\u4f5c\u7528\u4e86\uff0c\u9664\u975e\u662f\u8986\u76d6\u7d22\u5f15\uff0c\u5426\u5219\u6570\u636e\u5e93\u670d\u52a1\u5668\u9700\u8981\u6839\u636e\u7d22\u5f15\u626b\u63cf\u7684\u7ed3\u679c\u56de\u8868\uff0c\u67e5\u8be2\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u5982\u679c\u6570\u636e\u91cf\u5de8\u5927\uff0c\u8fd9\u5c06\u4ea7\u751f\u5927\u91cf\u968f\u673aI\/O\u3002<\/p>\n <\/p>\n \u4e3a\u4e86\u4fdd\u8bc1\u5927\u6570\u636e\u91cf\u53ef\u6269\u5c55\u6027\uff0c\u4e00\u822c\u4f7f\u7528\u5206\u533a\u6709\u4e0b\u9762\u4e24\u4e2a\u7b56\u7565\uff1a<\/p>\n \u5168\u91cf\u626b\u63cf\u6570\u636e\uff0c\u4e0d\u8981\u4efb\u4f55\u7d22\u5f15\u3002<\/p>\n<\/li>\n<\/ul>\n \u53ef\u4ee5\u4f7f\u7528\u7b80\u5355\u7684\u5206\u533a\u65b9\u5f0f\u5b58\u653e\u8868\uff0c\u4e0d\u8981\u4efb\u4f55\u7d22\u5f15\uff0c\u6839\u636e\u5206\u533a\u7684\u89c4\u5219\u5927\u81f4\u5b9a\u4f4d\u5230\u6570\u636e\u4f4d\u7f6e\u3002<\/p>\n \u8fd9\u4e2a\u7b56\u7565\u4f7f\u7528\u4e8e\u4ee5\u6b63\u5e38\u7684\u65b9\u5f0f\u8bbf\u95ee\u5927\u91cf\u6570\u636e\u7684\u65f6\u5019\u3002<\/p>\n \u7d22\u5f15\u6570\u636e\uff0c\u5e76\u5206\u79bb\u70ed\u70b9<\/p>\n<\/li>\n<\/ul>\n \u5982\u679c\u6570\u636e\u6709\u660e\u663e\u7684\u2018\u70ed\u70b9\u2019\uff0c\u800c\u4e14\u9664\u4e86\u8fd9\u90e8\u5206\u6570\u636e\uff0c\u5176\u4ed6\u6570\u636e\u5f88\u5c11\u88ab\u8bbf\u95ee\u5230\uff0c\u90a3\u4e48\u53ef\u4ee5\u5c06\u8fd9\u90e8\u5206\u70ed\u70b9\u6570\u636e\u5355\u72ec\u653e\u5728\u4e00\u4e2a\u5206\u533a\u4e2d\uff0c\u6784\u5efa\u7d22\u5f15\u4e5f\u80fd\u6709\u6548\u7f13\u5b58\u3002<\/p>\n <\/p>\n Create table sales(<\/p>\n Order_date DATETIME not null,<\/p>\n ---other columns omitted<\/p>\n )engine=INNODB partition by range(year(order_date))(<\/p>\n Partition p_2019 values less than (2019),<\/p>\n Partition p_2020 values less than (2020),<\/p>\n Partition p_2021 values less than (2021),<\/p>\n Partition p_catchall values less than MAXVALUE);<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n \u5206\u8868\u8be6\u89e3<\/strong>\uff1a<\/strong><\/p>\n \u5206\u8868\u66f4\u590d\u6742\uff0c\u4f46\u662f\u6027\u80fd\u7a0d\u5fae\u597d\u4e00\u70b9\u70b9\u3002\u4f46\u662f\u5982\u679cMysql\u53ef\u4ee5\u9ad8\u6548\u7684\u7ef4\u62a4\u5404\u4e2a\u5206\u533a\u4e4b\u95f4\u7684\u5173\u7cfb\u7684\u8bdd\uff0c\u5176\u5b9e\u5206\u8868\u662f\u6ca1\u6709\u5fc5\u8981\u7684\u3002\u9519\u8bef\u7684\u5206\u8868\u64cd\u4f5c\uff0c\u4f1a\u5e26\u6765bug<\/p>\n<\/li>\n \u5206\u8868\u7684\u6027\u80fd\u66f4\u597d\uff0c\u4e0d\u9700\u8981\u67e5\u8be2\u4f18\u5316\u5668\u6765\u9009\u62e9\u8bfb\u53d6\u54ea\u5f20\u8868\uff0c\u4f46\u662f\u5206\u8868\u7f16\u7801\u66f4\u590d\u6742\uff0c\u8981\u901a\u8fc7\u4ee3\u7801\u6307\u5b9a\u6570\u636e\u5b58\u50a8\u5230\u7279\u5b9a\u7684\u8868<\/p>\n<\/li>\n<\/ul>\n <\/p>\n <\/p>\n <\/p>\n 5.\u9ad8\u53ef\u7528MYSQL<\/strong><\/p>\n <\/p>\n \u521a\u521a\u4e0a\u4e00\u8282\u63d0\u5230\u4e86\u5206\u5e93\u7684\u6982\u5ff5\uff0c\u672c\u6765\u6253\u7b97\u5728\u4e0a\u4e00\u8282\u4e00\u5e26\u800c\u8fc7\uff0c\u4f46\u53d1\u73b0\u5206\u5e93\u6d89\u53ca\u7684\u6982\u5ff5\u8303\u56f4\u7279\u522b\u7684\u5e7f\uff0c\u5176\u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u4f1a\u9047\u5230\u5206\u5e03\u5f0fCAP\u539f\u5219\uff0cBASE\u539f\u5219\uff0c\u8fd8\u6709\u6570\u636e\u5e93\u7684\u590d\u5236\u3001\u53ef\u6269\u5c55\u6027\u548c\u9ad8\u53ef\u7528\u6027\u3002<\/p>\n <\/p>\n CAP\u539f\u5219<\/strong>\uff1a<\/strong><\/p>\n <\/p>\n CAP\u539f\u5219\u7684\u7cbe\u9ad3\u5c31\u662f\u5f53\u53d1\u751f\u5206\u533a\u5f02\u5e38\u65f6\uff0c\u4e00\u81f4\u6027\u548c\u53ef\u7528\u6027\u4e0d\u80fd\u540c\u65f6\u5b9e\u73b0\u3002<\/p>\n <\/p>\n \u4e00\u81f4\u6027\uff08C\uff09<\/strong>\uff1a\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u6240\u6709\u6570\u636e\u5907\u4efd\uff0c\u5728\u540c\u4e00\u65f6\u523b\u662f\u5426\u540c\u6837\u7684\u503c\uff0c\u5373\u5199\u64cd\u4f5c\u4e4b\u540e\u7684\u8bfb\u64cd\u4f5c\uff0c\u5fc5\u987b\u8fd4\u56de\u8be5\u503c\u3002\uff08\u5206\u4e3a\u5f31\u4e00\u81f4\u6027\u3001\u5f3a\u4e00\u81f4\u6027\u548c\u6700\u7ec8\u4e00\u81f4\u6027\uff09<\/p>\n \u53ef\u7528\u6027\uff08A\uff09<\/strong>\uff1a\u5728\u96c6\u7fa4\u4e2d\u4e00\u90e8\u5206\u8282\u70b9\u6545\u969c\u540e\uff0c\u96c6\u7fa4\u6574\u4f53\u662f\u5426\u8fd8\u80fd\u54cd\u5e94\u5ba2\u6237\u7aef\u7684\u8bfb\u5199\u8bf7\u6c42\u3002\uff08\u5bf9\u6570\u636e\u66f4\u65b0\u5177\u5907\u9ad8\u53ef\u7528\u6027\uff09<\/p>\n \u5206\u533a\u5bb9\u5fcd\u6027\uff08P\uff09<\/strong>\uff1a\u4ee5\u5b9e\u9645\u6548\u679c\u800c\u8a00\uff0c\u5206\u533a\u76f8\u5f53\u4e8e\u5bf9\u901a\u4fe1\u7684\u65f6\u9650\u8981\u6c42\u3002\u7cfb\u7edf\u5982\u679c\u4e0d\u80fd\u5728\u65f6\u9650\u5185\u8fbe\u6210\u6570\u636e\u4e00\u81f4\u6027\uff0c\u5c31\u610f\u5473\u7740\u53d1\u751f\u4e86\u5206\u533a\u7684\u60c5\u51b5\uff0c\u5fc5\u987b\u5c31\u5f53\u524d\u64cd\u4f5c\u5728C\u548cA\u4e4b\u95f4\u505a\u51fa\u9009\u62e9\u3002<\/p>\n <\/p>\n BASE\u539f\u5219<\/strong>\uff1a<\/strong><\/p>\n <\/p>\n \u5728CAP\u539f\u5219\u4e2d\uff0c\u5728\u4fdd\u8bc1\u53ef\u7528\u6027\u548c\u5206\u533a\u5bb9\u5fcd\u6027\u7684\u6761\u4ef6\u4e0b\uff0c\u65e2\u7136\u65e0\u6cd5\u540c\u65f6\u5b9e\u73b0\u5f3a\u4e00\u81f4\u6027\uff0c\u4f46\u53ef\u4ee5\u6839\u636e\u6bcf\u4e2a\u4e1a\u52a1\u7684\u7279\u70b9\uff0c\u91c7\u7528\u9002\u5f53\u7684\u65b9\u5f0f\u5b9e\u73b0\u6700\u7ec8\u4e00\u81f4\u6027\u3002<\/p>\n <\/p>\n \u57fa\u672c\u53ef\u7528\u6027\uff08BA\uff09<\/strong>\uff1a\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u51fa\u73b0\u4e0d\u53ef\u9884\u77e5\u7684\u6545\u969c\u65f6\uff0c\u5141\u8bb8\u635f\u5931\u90e8\u5206\u53ef\u7528\u6027<\/p>\n \u6bd4\u5982\uff1a1.\u54cd\u5e94\u65f6\u95f4\u7684\u635f\u5931<\/p>\n 2.\u529f\u80fd\u964d\u7ea7 <\/p>\n \u8f6f\u72b6\u6001\uff08S\uff09<\/strong>\uff1a\u5141\u8bb8\u7cfb\u7edf\u5728\u4e0d\u540c\u7ed3\u70b9\u7684\u6570\u636e\u526f\u672c\u4e4b\u95f4\u8fdb\u884c\u540c\u6b65\u7684\u8fc7\u7a0b\u5b58\u5728\u5ef6\u8fdf\u3002<\/p>\n \u6bd4\u5982\uff1a\u8de8\u7cfb\u7edf\u7684T+0\u5b9a\u65f6\u63a8\u9001<\/p>\n \u6700\u7ec8\u4e00\u81f4\u6027\uff08E\uff09<\/strong>\uff1a\u7cfb\u7edf\u4fdd\u8bc1\u6700\u7ec8\u6570\u636e\u80fd\u591f\u8fbe\u6210\u4e00\u81f4\uff0c\u800c\u4e0d\u9700\u8981\u7cfb\u7edf\u4fdd\u8bc1\u6570\u636e\u7684\u5f3a\u4e00\u81f4\u3002<\/p>\n \u6bd4\u5982\uff1a\u8d22\u62a5\u7cfb\u7edf\u7684T+1\u6570\u636e\u63a8\u9001<\/p>\n <\/p>\n <\/p>\n \u6570\u636e\u5e93\u590d\u5236<\/strong>\uff1a<\/strong><\/p>\n <\/p>\n \u590d\u5236\u4e09\u4e2a\u6b65\u9aa4\uff1a<\/strong><\/p>\n 1.\u5728\u4e3b\u5e93\u4e0a\u628a\u6570\u636e\u66f4\u6539\u8bb0\u5f55\u5230\u4e8c\u8fdb\u5236\u65e5\u5fd7\u4e2d\uff08Binary log\uff09<\/p>\n 2.\u5907\u5e93\u5c06\u4e3b\u5e93\u4e0a\u7684\u65e5\u5fd7\u590d\u5236\u5230\u81ea\u5df1\u7684\u4e2d\u7ee7\u65e5\u5fd7<\/p>\n 3.\u5907\u5e93\u8bfb\u53d6\u4e2d\u7ee7\u65e5\u5fd7\u4e2d\u7684\u65f6\u95f4\uff0c\u5c06\u5176\u91cd\u653e\u5230\u5907\u5e93\u6570\u636e\u4e4b\u4e0a<\/p>\n <\/p>\n \u6570\u636e\u5e93\u53ef\u6269\u5c55\u6027<\/strong>\uff1a<\/strong><\/p>\n <\/p>\n \u7ebf\u6027\u6269\u5c55\uff0c\u963f\u59c6\u8fbe\u5c14\u6269\u5c55Amdahl\uff0cUSL\u6269\u5c55<\/p>\n <\/p>\n <\/p>\n <\/p>\n \u6269\u5c55\u65b9\u5f0f<\/strong>\uff1a<\/strong><\/p>\n 1.\u589e\u52a0\u786c\u4ef6\u914d\u7f6e<\/p>\n 2.\u590d\u5236\uff0c\u62c6\u5206\uff0c\u6570\u636e\u5206\u7247<\/p>\n a) \u590d\u5236\uff1a\u4e3b\u4e3b\u590d\u5236\u7ed3\u6784\uff0c\u4e00\u4e3b\u591a\u5907\u7ed3\u6784...<\/p>\n b) \u6309\u529f\u80fd\u62c6\u5206\u5e93\uff0c\u7528\u63a5\u53e3\u5bf9\u63a5\u3002\u5982\uff1a\u8bba\u575b\uff0c\u65b0\u95fb\uff0c\u77e5\u8bc6\u5e93<\/p>\n c) \u6570\u636e\u5206\u7247\uff1a\u5206\u533a\uff0c\u5206\u8868<\/p>\n <\/p>\n \u8d1f\u503a\u5747\u8861<\/strong>\uff1a<\/strong><\/p>\n 1.\u590d\u5236\u4e0a\u7684\u8bfb\u5199\u5206\u79bb<\/p>\n 2.\u4fee\u6539\u5e94\u7528\u914d\u7f6e\u6587\u4ef6<\/p>\n 3.\u4fee\u6539DNS\u540d<\/p>\n 4.\u8f6c\u79fbIP\u5730\u5740<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n 6.MYSQL\u4e2d\u7684Explain<\/strong><\/p>\n <\/p>\n \u6982\u8981\u63cf\u8ff0\uff1a<\/p>\n id:\u9009\u62e9\u6807\u8bc6\u7b26select_type:\u8868\u793a\u67e5\u8be2\u7684\u7c7b\u578b\u3002<\/p>\n table:\u8f93\u51fa\u7ed3\u679c\u96c6\u7684\u8868 <\/p>\n partitions:\u5339\u914d\u7684\u5206\u533a<\/p>\n type:\u8868\u793a\u8868\u7684\u8fde\u63a5\u7c7b\u578b<\/p>\n possible_keys:\u8868\u793a\u67e5\u8be2\u65f6\uff0c\u53ef\u80fd\u4f7f\u7528\u7684\u7d22\u5f15<\/p>\n key:\u8868\u793a\u5b9e\u9645\u4f7f\u7528\u7684\u7d22\u5f15<\/p>\n key_len:\u7d22\u5f15\u5b57\u6bb5\u7684\u957f\u5ea6<\/p>\n ref:\u5217\u4e0e\u7d22\u5f15\u7684\u6bd4\u8f83<\/p>\n rows:\u626b\u63cf\u51fa\u7684\u884c\u6570(\u4f30\u7b97\u7684\u884c\u6570)<\/p>\n filtered:\u6309\u8868\u6761\u4ef6\u8fc7\u6ee4\u7684\u884c\u767e\u5206\u6bd4<\/p>\n Extra:\u6267\u884c\u60c5\u51b5\u7684\u63cf\u8ff0\u548c\u8bf4\u660e<\/p>\n <\/p>\n \u603b\u7ed3\u8d77\u6765\u53d1\u73b0\uff0c\u4e0b\u9762\u94fe\u63a5\u7684\u535a\u4e3b\u5df2\u7ecf\u603b\u7ed3\u7684\u5f88\u5230\u4f4d\uff0c\u65e0\u9700\u6211\u591a\u89e3\u91ca\uff5e<\/p>\n \u5177\u4f53\u5185\u5bb9\u53c2\u8003:https:\/\/www.cnblogs.com\/tufujie\/p\/9413852.html \/ \u9ad8\u6027\u80fdMYSQL\u9644\u5f55D<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n \u53c2\u8003\u6587\u732e\uff1a<\/p>\n 1.https:\/\/www.cnblogs.com\/wzj4858\/p\/7910340.html \u903b\u8f91\u67b6\u6784\u56fe<\/p>\n 2.https:\/\/www.jianshu.com\/p\/71563d6b121d \u6570\u636e\u5e93\u56db\u5927\u8303\u5f0f<\/p>\n 3.https:\/\/blog.csdn.net\/lixinkuan328\/article\/details\/ <\/p>\n CAP\u539f\u5219\u8be6\u89e3<\/p>\n 4.\u300a\u9ad8\u6027\u80fdMYSQL\u300b<\/p>\n 5.https:\/\/www.cnblogs.com\/tufujie\/p\/9413852.html Explain\u8be6\u89e3<\/p>\n","protected":false},"excerpt":{"rendered":"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b\u6b22\u8fce\u6765\u5230\u3010\u7ed8\u7a7a\u4e8bJ\u3011\u5b66\u4e60\u5c4b\uff5e\u90a3\u4e48\uff5e\u9762\u7801\u85cf\u597d\u4e86\u5417\uff1f\u5feb\u6765\u542c\u6211\u8bb2\u8bb2\u90a3\u4e9b\u5e74\u6211\u4eec\u4ecd\u7136\u672a\u5b66\u4f1a\u7684MYSQL\u77e5\u8bc6\uff01\u57fa...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/5306"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=5306"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/5306\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=5306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=5306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=5306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b](\"https:\/\/img-blog.csdnimg.cn\/img_convert\/e61419f74b969a49b3de5eff18e619f1.png\" "\\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b")
<\/p>\n![\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b](\"https:\/\/img-blog.csdnimg.cn\/img_convert\/29f637f0186b82ac78086f9ff4213935.png\" "\\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b")
<\/p>\n![\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b](\"https:\/\/img-blog.csdnimg.cn\/img_convert\/00beeb5767f531ce8b69d73c6ca3eb95.png\" "\\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b")
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![\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b](\"https:\/\/img-blog.csdnimg.cn\/img_convert\/59dd9b8185fe7fb0139f3cb33a8be71a.png\" "\\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b")
<\/p>\n![\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b](\"https:\/\/img-blog.csdnimg.cn\/img_convert\/a90fb4354c0bbd318d1239f94c9f817a.png\" "\\"mysql\u5fc5\u77e5\u5fc5\u4f1a_MySQL\u6559\u7a0b")
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