一、MySQL用户管理。一个MySQL数据库里可以跑多个库，总不能给所有人的程序员root用户，则可以给他们单独的用户访问数据库。创建用户：（grant all on *.* to 'user1'是把所有库的权限给'user1，他的来源Ip是127.0.0.1，他的密码是lty123456'）（第一个*是库名，如果你写成mysql.*那就是对mysql库的所有权限）（来源ip也可以写成 ....

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