[英]Passing a list into a stored procedure
我有兩個需要插入數據庫的ID列表。 我要在這里做的是,將這兩個列表傳遞到存儲過程中,並嘗試使用while循環將其添加。 我試圖使用用戶定義的類型來定義數組,但是不知道如何將其傳遞給插入命令
CREATE TYPE [dbo].[Array] AS TABLE(
[Item] [NVARCHAR](MAX) NULL
);
這是SQL / PL:
ALTER PROCEDURE [dbo].[sp_create_order]
(@productIds AS Array READONLY, @priceIds AS Array READONLY)
AS
BEGIN
DECLARE @i int
DECLARE @n int
set @n = count(@productIds)
set @i = 1;
while (@i <= @n)
BEGIN
INSERT INTO order_detail(product_id,price_id)
VALUES(@productIds[i],@priceIds[i]);
set @i = @i + 1;
END
END
RETURN 0
考慮更改您的類型以包括兩個對。
CREATE TYPE [dbo].[ProductPrices] AS TABLE(
[ProductId] [NVARCHAR](MAX) NULL,
[PriceId] [NVARCHAR](MAX) NULL
);
然后將您的過程更改為以下內容:
create procedure [dbo].[sp_create_order] @productPrices dbo.ProductPrices READONLY
as
begin
insert into order_detail
select p.ProductId,
p.PriceId
from @productPrices p
end
然后,您可以這樣調用過程。
declare @productPrices dbo.ProductPrices;
insert into @productPrices
values('1', '7'),
('2', '12'),
('3', '8');
exec dbo.sp_create_order @productPrices;
看起來您正在學習表值參數,應該創建一個具有兩列的表值參數,以便您可以直接插入
這是解決您當前問題的一種方法,我們可以使用ROW_NUMBER
生成序列號並從兩個表中獲取行值
create PROCEDURE [dbo].[sp_create_order]
(@productIds AS Array READONLY, @priceIds AS Array READONLY)
AS
BEGIN
INSERT INTO order_detail(product_id,price_id)
select T1.item, T2.item
FROM
(select item , ROW_NUMBER() over ( order by (select null)) as seq from @productIds) T1
join
(select item , ROW_NUMBER() over ( order by (select null)) as seq from @priceIds) T2
on T1.seq = T2.seq
END
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