1.SQL为什么慢，如何定位处理？
https://blog.csdn.net/weixin_44982466/article/details/107431303https://www.cnblogs.com/zhu998/p/14070005.html
https://www.cnblogs.com/linjiqin/archive/2012/04/01/2428695.html
https://www.cnblogs.com/ding2016/p/9929040.html
5.什么是脏读、幻读？（MySQL）
https://blog.csdn.net/lonely_bin/article/details/96175384
6.亿级数据mysql优化
https://cloud.tencent.com/developer/article/1530374
7总结MySQL 8种性能优化方式
https://blog.csdn.net/weixin_44321942/article/details/89161781
8.Mysql各种存储引擎对比总结
https://baijiahao.baidu.com/s?id=1655327558614401593&wfr=spider&for=pc
https://www.cnblogs.com/yunfeifei/p/3850440.html
https://www.cnblogs.com/personsiglewine/p/11507866.html
11.谈谈你对mysql联合索引的认识?
https://zhuanlan.zhihu.com/p/115778804
https://www.cnblogs.com/jxxblogs/p/12162717.html
