MySQL创建， 修改，删除用户密码
创建用新户名密码
创建用新户名密码： create user 'test1'@'localhost' identified by 'test1';
修改用户名密码
修改用户名密码：alter user 'root'@'localhost' identified with mysql_native_password by '123456';
修改密码后再执行sql语句：flush privileges;
删除用户
删除用户： delete from mysql.user where host='localhost' and user='test1';
删除用户后再执行sql语句：flush privileges;