--drop function [get_Fee]
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

create function [dbo].[get_Fee](@Contractno varchar(50),@Feename varchar(50),@Feetype tinyint)   
    returns numeric(18,2)   
    as   
       begin      
          declare  @S numeric(18,2)       
          select @S=(
			select sum(cf.amount) from ch_fee cf where cf.bsno=@Contractno
			and cf.feename=@Feename and cf.feetype=@Feetype)
		  if @s is null 
			set @s=0 
          return @S   
      end   
GO

select dbo.[get_Fee]('XXH201311180001','β¿î',1)

select * from ch_fee