我在SQL Server中将ID列表varchar
转换为整数以用作参数时出现问题。我知道如果你这样做会有效:
SELECT *
FROM MyTable
WHERE MyTableId IN (26,27,28)` --list of IDs to be selected
但将此ID列表放在varchar
中,因为我希望我的参数是动态的,会返回一些错误。
我的代码是这样的:
DECLARE @ids varchar(100)
SET @ids = '26,27,28'
SELECT *
FROM MyTable
WHERE MyTableId in (@ids) --(26,27,28)`
它不起作用,因为MyTableId
是数据类型int
答案 0 :(得分:0)
您必须将逗号分隔值覆盖到表格。为SQL SERVER执行此操作
CREATE FUNCTION SplitString
(
@Input NVARCHAR(MAX),
@Character CHAR(1)
)
RETURNS @Output TABLE (
Item NVARCHAR(1000)
)
AS
BEGIN
DECLARE @StartIndex INT, @EndIndex INT
SET @StartIndex = 1
IF SUBSTRING(@Input, LEN(@Input) - 1, LEN(@Input)) <> @Character
BEGIN
SET @Input = @Input + @Character
END
WHILE CHARINDEX(@Character, @Input) > 0
BEGIN
SET @EndIndex = CHARINDEX(@Character, @Input)
INSERT INTO @Output(Item)
SELECT SUBSTRING(@Input, @StartIndex, @EndIndex - 1)
SET @Input = SUBSTRING(@Input, @EndIndex + 1, LEN(@Input))
END
RETURN
END
SELECT * FROM MyTable where MyTableId in
(SELECT * FROM dbo.SplitString('26,27,28', ',')) --(26,27,28)