- https://sqlzoo.net/wiki/SELECT_basics/zh
- SQL语句在线练习 http://sample.jimstone.com.cn/xsql/
- SQL语句测验 http://www.w3school.com.cn/quiz/quiz.asp?quiz=sql
- sql语句练习50题(Mysql版) https://blog.csdn.net/fashion2014/article/details/78826299/
- http://sqlfiddle.com/
MySQL等 SQL语句在线练习
原文：https://www.cnblogs.com/qinxiaoqin/p/11008704.html
