https://www.cnblogs.com/hhhh2010/p/5200243.html

https://www.cnblogs.com/gaohanghang/p/12099614.html

https://blog.csdn.net/NMZLduiduidui/article/details/111522289

https://www.cnblogs.com/maxxu11/p/12867850.html

https://blog.csdn.net/weixin_44059002/article/details/111184260

https://blog.csdn.net/qq_35843543/article/details/81561240/

创建用户：create user ‘test’@’%’ identified by ‘test’;显示ERROR 1396 (HY000): Operation CREATE USER failed for ‘test’@’%’查看是不是存在这个...

https://www.yisu.com/zixun/43064.html

日期转时间戳 SELECT EXTRACT(epoch FROM NOW()); SELECT EXTRACT(epoch FROM CAST('2017-12-06 00:17:10' AS TIMESTAMP));

https://www.cnblogs.com/cou1d/p/12580773.html