这是我的SQL查询。
CREATE FUNCTION UF_GetOrderProducts
(
@OrderId int
)
RETURNS VARCHAR(500)
AS
BEGIN
SELECT Identity(int,1,1) ID, ProductId INTO #Temp FROM OrderProduct WHERE OrderId = @OrderId
Declare @Id int,
@Count int,
@LoopCount int,
@ProductList VARCHAR(500),
@ProductListTemp VARCHAR(500)
SET @Count = (Select Count(*) From #Temp)
SET @LoopCount = 1
SET @ProductList = ''
WHILE @LoopCount <= @Count
BEGIN
SET @ProductListTemp =( SELECT Name FROM Product WHERE ProductId =(Select ProductId from #Temp Where ID = @LoopCount))
SET @ProductList +=@ProductListTemp + '<br/>'
Set @LoopCount=@LoopCount + 1
END
DROP TABLE #Temp
RETURN @ProductList
END
GO
我必须在#Temp Table中循环。你还有其他建议吗?
答案 0 :(得分:21)
您可以使用表变量代替临时表。
declare @Temp TABLE (ID int identity, ProductId int)
insert into @Temp(ProductId)
select ProductId
from OrderProduct
where OrderId = @OrderId
但是你可以在没有循环的情况下重写你的函数。
这样的事情应该做你想做的事。
create function IF_GetOrderProducts
(
@OrderId int
)
returns varchar(500)
as
begin
return
(
select Name+'<br/>'
from Product as P
inner join OrderProduct as OP
on P.ProductId = OP.ProductId
where OP.OrderId = @OrderId
for xml path(''), type
).value('.', 'varchar(500)')
end