What is the difference between ; and GO in stored procedure in SQL Server?

Question

What is the difference between ; and GO in stored procedure in SQL Server ?

Actually, if I have a stored procedure in SQL server and wanna to p

Answer 1

The semicolon separates queries, the GO command separates batches. (Also GO is not a T-SQL command, it's a command recognised by the sqlcmd and osql utilities and Management Studio.)

You can't use GO inside a stored procedure. If you would try, the definition of the procedure will end there, and the rest will be a separate batch.

A local variable has the scope of the batch, so after a GO command you can't use local variables declared before the GO command:

declare @test int

set @test = 42

GO

select @Test -- causes an error message as @Test is undefined