SqlServer 글로벌 변수

1、@@ERROR 

 @@ERROR  DML select 0 0 

-- Create Schema if not one exists with same name and owner
    set @stmtS = 'create schema '
    set @stmtS = @stmtS + quotename(@rolename, ']')
    set @stmtS = @stmtS + ' authorization '
    set @stmtS = @stmtS + quotename(@rolename, ']')
    
    BEGIN TRANSACTION

    -- issue DDL to create the role --
    exec (@stmtR)    
    if @@error <> 0
    begin
        ROLLBACK TRANSACTION
        return (1)
    end