SQL取得最大排序数字并累加1的自定义函数

/**********************************************************************
函数名:GetMaxSqrt(@SqrtType)
参数:@SqrtType定义取值的表
@MaxSqrtID:返回max(sqrt)+1
返回数字
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**********************************************************************/
CREATEFUNCTIONGetMaxSqrt(@SqrtTypeasint)
RETURNSint
WITHENCRYPTION
as
BEGIN
declare@MaxSqrtIDasint
if(@SqrtType=1)
begin
select@MaxSqrtID=max(CategorySqrt)fromLXBIZ_Category
end
if(@SqrtType=2)
begin
SELECT@MaxSqrtID=max(SubClassSqrt)FROMLXBIZ_SubClass
end
if(@MaxSqrtIDisnull)
begin
select@MaxSqrtID=0
end
return@MaxSqrtID+1
END