这是最好的来源:
http://www.sommarskog.se/arrays-in-sql.html http://www.sommarskog.se/arrays-in-sql.html
创建一个 split 函数,并按如下方式使用它:
SELECT
*
FROM YourTable y
INNER JOIN dbo.splitFunction(@Parameter) s ON y.ID=s.Value
我更喜欢数字表方法 http://www.sommarskog.se/arrays-in-sql-2005.html#tblnum
要使此方法发挥作用,您需要执行以下一个时间表设置:
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)
设置 Numbers 表后,创建此函数:
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
现在,您可以轻松地将 CSV 字符串拆分为表并加入其中:
select * from dbo.FN_ListToTable(',','1,2,3,,,4,5,6777,,,')
OUTPUT:
ListValue
-----------------------
1
2
3
4
5
6777
(6 row(s) affected)
您可以将 CSV 字符串传入过程并仅处理给定 ID 的行:
SELECT
y.*
FROM YourTable y
INNER JOIN dbo.FN_ListToTable(',',@GivenCSV) s ON y.ID=s.ListValue