使用表值參數(新的SQL Server 2008)設置它通過創建實際的表參數類型:
CREATE TYPE IntTableType AS TABLE (ID INTEGER PRIMARY KEY)
你的程序將被:
Create Procedure up_TEST
@Ids IntTableType READONLY
AS
SELECT *
FROM ATable a
WHERE a.Id IN (SELECT ID FROM @Ids)
RETURN 0
GO
如果您不能使用表值參數,請參閱:"Arrays and Lists in SQL Server 2005 and Beyond, When Table Value Parameters Do Not Cut it" by Erland Sommarskog,那麼在SQL Server中有很多方法來拆分字符串。本文涵蓋了幾乎所有方法的PRO和CON。一般來說,你需要創建一個分割函數。這是一個分裂的功能如何使用:
SELECT
*
FROM YourTable y
INNER JOIN dbo.yourSplitFunction(@Parameter) s ON y.ID=s.Value
I prefer the number table approach to split a string in TSQL但也有許多方法來拆分在SQL Server中的字符串,見前面的鏈接,這說明各的優點和缺點。
對於數字表的方法來工作,你需要做的這一次表的設置,這將創建一個包含從1到10000行的表Numbers
:
SELECT TOP 10000 IDENTITY(int,1,1) AS Number
INTO Numbers
FROM sys.objects s1
CROSS JOIN sys.objects s2
ALTER TABLE Numbers ADD CONSTRAINT PK_Numbers PRIMARY KEY CLUSTERED (Number)
一旦Numbers表格設置,創建此分割功能:
CREATE FUNCTION [dbo].[FN_ListToTable]
(
@SplitOn char(1) --REQUIRED, the character to split the @List string on
,@List varchar(8000)--REQUIRED, the list to split apart
)
RETURNS TABLE
AS
RETURN
(
----------------
--SINGLE QUERY-- --this will not return empty rows
----------------
SELECT
ListValue
FROM (SELECT
LTRIM(RTRIM(SUBSTRING(List2, number+1, CHARINDEX(@SplitOn, List2, number+1)-number - 1))) AS ListValue
FROM (
SELECT @SplitOn + @List + @SplitOn AS List2
) AS dt
INNER JOIN Numbers n ON n.Number < LEN(dt.List2)
WHERE SUBSTRING(List2, number, 1) = @SplitOn
) dt2
WHERE ListValue IS NOT NULL AND ListValue!=''
);
GO
您現在可以輕鬆地拆分CSV字符串轉換成表格,並加入就可以了:
Create Procedure up_TEST
@Ids VARCHAR(MAX)
AS
SELECT * FROM ATable a
WHERE a.Id IN (SELECT ListValue FROM dbo.FN_ListToTable(',',@Ids))
非常感謝,我將通讀這篇文章。我很欣賞這個方向! – twal 2010-09-27 18:41:34