动态SQL查询(变量项和每列的变量项)

抱歉,这篇文章太长了,但大部分都是我的剧本:

如果我有一张桌子:

(dbo).(People)
ID   Name   Age
1    Joe    28
2    Bob    32
3    Alan   26
4    Joe    27

DECLARE @ID int, @Name nvarchar(25), @Age int
SET @ID = 1
SET @Name = 'Joe'
SET @Age = null

SELECT *
FROM dbo.People
WHERE
(ID = @ID or @ID is null) AND
(Name like @Name or @Name is null) AND
(Age = @Age or @Age is null)

DECLARE @text nvarchar(100)
SET @text = '1, 3'

DECLARE @ids AS TABLE (n int NOT NULL PRIMARY KEY)

--//parse the string into a table
DECLARE @TempString nvarchar(300), @Pos int
SET @text = LTRIM(RTRIM(@text))+ ','
SET @Pos = CHARINDEX(',', @text, 1)
IF REPLACE(@text, ',', '') <> ''
BEGIN
    WHILE @Pos > 0
    BEGIN
        SET @TempString = LTRIM(RTRIM(LEFT(@text, @Pos - 1)))
        IF @TempString <> '' --just: IF @TempString != ''
        BEGIN
            INSERT INTO @ids VALUES (@TempString)
        END
        SET @text = RIGHT(@text, LEN(@text) - @Pos)
        SET @Pos = CHARINDEX(',', @text, 1)
    END
END


SELECT *
FROM   dbo.People
WHERE  
ID IN (SELECT n FROM @ids)

现在,我的问题是我似乎不知道如何将两者结合起来,因为我不能把:

WHERE
(Name like @Name or @Name is null) AND
(Id IN (SELECT n FROM @ids) or @ids is null)

因为@ids永远不会为null(因为它是一个表)