Mysql语句练习 sql语句练习50题(Mysql版) Mysql高级查询语句练习

MySQL查询语句的45道练习:

https://www.cnblogs.com/aqxss/p/6563625.html

sql语句练习50题(Mysql版)

https://blog.csdn.net/fashion2014/article/details/78826299

Mysql高级查询语句练习

https://blog.csdn.net/qq_23994787/article/details/77162470