SQL判断语句

ALTER PROCEDURE [dbo].[Paper_GetAlreadyCheckedNum]
 /*
 (
 @parameter1 int = 5,
 @parameter2 datatype OUTPUT
 )
 */
    @college nvarchar(30)
AS
 /* SET NOCOUNT ON */
 if @college = '研究生院'
 begin
  select count(*) from Paper where IfChecked='是'
 end
 else
 begin
  select count(*) from Paper where IfChecked='是' and College=@college
 end
 RETURN