启动mysql时，报如下警告信息：
[Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
修改方法：
在配置my.cnf中加入，然后启动mysql
[mysqld] explicit_defaults_for_timestamp=true
explicit_defaults_for_timestamp参数说明可以参考上一篇文章：
http://www.cnblogs.com/abclife/p/5051861.html
[Warning] TIMESTAMP with implicit DEFAULT value is deprecated
原文：http://www.cnblogs.com/abclife/p/5051589.html