记录mysql 使用role赋予user权限
create role "zdkall" 创建角色租
grant all privileges on *.* to 'zdkall'; 赋予角色租权限
create user "zdklngchen1"@"%" identified by "zdklngchen1"; 创建用户
grant zdkall to zdklngchen1; 把用户加入组
set default role all to zdklngchen1; 给组内用户设置组的权限