MySQL adds users and grants query only permission

• Create user

create user 'userName'@'%' identified by '123456';

The user is called userName, The password is 123456 Users of （userName,123456 Can be specified ）

• Grant authority

grant select on mysql.* to 'userName'@'%';

Grant the user name as userName, The database for mysql The query authority of .（mysql Is the database name , Can be specified ）

• Refresh the permission cache

flush privileges;

• use Navicat Do connection test .

The advantage of this is to grant userName Permission to query data , Reduce database deletion 、 Risk of being modified .