sql server grant, revoke permission to a user

Question

I wrote a simple c# code that connect to sql-server database and execute a query:

        cmd = new SqlCommand(txtQuery.Text.ToString().Trim(), con);
        cmd         


        

Answer 1

user2 is probably getting it's permissions from a role membership.

Run:

use []
GO

exec sp_helpuser

find the user in the first column, and then look at the second column. Is the user a member of db_datareader or db_owner?

If so, you can revoke membership, say for db_datareader, by doing:

exec sp_droprolemember 'db_datareader', 'user2'
GO