create function fn_with_parameter
(
@id int=null
)
returns int
with returns null on null input
as
begin
declare @total int
select @total=sum(marks) from test3
where [email protected]
return @total
end
选择：
select dbo.fn_with_parameter(default);
修改你的函数为：
create function fn_with_parameter
(
@id int=null
)
returns int
--with returns null on null input
as
begin
declare @total int=0
if isnull(@id,'') = ''
set @id = ''
select @total=sum(marks) from test3
where isnull(id,'')[email protected]
return isnull(@total,0)
end
select dbo.fn_with_parameter(default);
可能你详细说明你的问题？只是复制/粘贴代码不能够让SO社区帮助你。 –
'空输入返回null'，'@id int = null'，'dbo.fn_with_parameter（默认）' - ??? –
@PareshJ代码正常..但输出为空 –