在SQL Server中，允许使用GROUP BY子句的以下哪些语句？( )
SELECT Column1 + Column2 FROM Table GROUP BY Column1, Column2
SELECT Column1, Column2 FROM Table GROUP BY Column1 + Column2
SELECT Column1 + constant + Column2 FROM Table GROUP BY Column1 + Column2
SELECT Column1 + Column2 FROM Table GROUP BY Column1 + Column2
