sql函数

函数

ALTER function [dbo].[fn_Rollperiodin]
(
    @id VARCHAR(100) 
)
returns VARCHAR(1000)
as
BEGIN
DECLARE @mess VARCHAR(1000)
SET @mess=''
declare @volumelength VARCHAR(18)
DECLARE oprpsn_cursor CURSOR FOR

    SELECT(convert(decimal(18, 2), isnull(rollperiodin.ep_volumelength, 0)))
    from  ep_rollperiodin AS rollperiodin
    JOIN  ep_roll AS ro ON  rollperiodin.ep_roll=ro.ep_RollId   
    WHERE ro.ep_RollId= @id
    OPEN oprpsn_cursor
    FETCH NEXT FROM oprpsn_cursor INTO @volumelength
    WHILE @@FETCH_STATUS = 0
    BEGIN
        SET @mess=@mess+@volumelength+','
        FETCH NEXT FROM oprpsn_cursor INTO @volumelength
        END
        CLOSE oprpsn_cursor        
    DEALLOCATE oprpsn_cursor
            if len(@mess)>0
        set @mess=left(@mess,len(@mess)-1)

    RETURN @mess
END