Mysql相关

1、mysql 字段设置为null是否走索引实验
https://blog.51cto.com/u_16213573/7208775

2、MySQL is null 走不走索引？
https://blog.csdn.net/Sherlook_Holmes/article/details/130778635

3、mysql（十二）一图带你看懂组合索引的索引结构
https://blog.csdn.net/lz710117239/article/details/106876485/

4、聚簇索引和非聚簇索引
https://mp.weixin.qq.com/s?__biz=MzAxMjY5NDU2Ng==&mid=2651861539&idx=1&sn=77e036f27b300dfddc979842f3255b30&chksm=8049776ab73efe7cdc3c777e6c499bfcd92538d97210e8b745e7402d2e1068367a9877f8dca4&scene=27

5、索引原理详解
https://blog.csdn.net/qq_36733838/article/details/128330306

6、Mysql深度分页优化思路和方案
https://blog.csdn.net/dongci777/article/details/137566969

很好的一本书
MySQL 是怎样运行的：从根儿上理解 MySQL