[骚年，又来了] SQL 标值函数问题

SQL code

ALTER FUNCTION [dbo].[f_strAddr](@Oid VARCHAR)RETURNS varchar(8000)ASBEGIN                                                            DECLARE @str VARCHAR(8000)        SET @str=''        SELECT @str=@str+' '+B.COL1 FROM        (            SELECT (cast(SUM(A.NUM)AS varchar)+'*'+A.SKU_CODE+'<'+A.PACKING_STANDARD+'>') AS COL1 FROM(            SELECT TETP.Oid,SPM.SKU_CODE,SV.PACKING_STANDARD,TETP.NUM*SPM.SKU_QTY AS NUM            FROM tEBay_TradeProduct tetp            JOIN SKU_PRODUCT_MTM spm ON TETP.SKU=SPM.PRODUCT_CODE            JOIN sku_vtzero sv ON SPM.SKU_CODE=SV.CODE             WHERE OID=@Oid            ) A GROUP BY A.Oid,A.SKU_CODE,A.PACKING_STANDARD        ) B                        --SELECT @str=@str+' '+SKU_CODE FROM TMP t                        RETURN @str                END

执行效果，调用函数咋返回 “受影响函数”，而单独执行那段代码就是OK 的：


[解决办法]
ALTER FUNCTION [dbo].[f_strAddr](@Oid VARCHAR(100)) ---指定下长度再测下看看
RETURNS varchar(8000)
AS

[解决办法]
不写长度，默认为1