Multiple commands on one line in SQL Server 2005

use master; sp_spaceused mytable;

should suffice. GO simply signals the end of a batch of Transact-SQL statements to the SQL Server utilities.

You don't need GO. Just use ;

The answers provided thus far are incorrect. It does not work to combine lines with a semi-colon if the lines must be in a separate batch. Try this one:

DECLARE @x int; DECLARE @x int;