Wildcards can be used to select by well name, screen name, well class, and screen group. You can use an underscore as a wildcard for one character or a % sign for one or more characters. "_W__1" and "%A%" are for example legitimate values that can be entered into the query tab. You can also enter "[MW]" to get any value whose name starts with M or W. Also, "[!W]" will select all wells not starting with a W. You might want to look at http://www.w3schools.com/sql/sql_wildcards.asp or http://www.tutorialspoint.com/sql/sql-wildcards.htm for some guidance on sql wildcards.
