我有一个功能：

ALTER FUNCTION [dbo].[func_ParseString] (@list nvarchar(MAX))
   RETURNS @tbl TABLE (string VARCHAR(500) NOT NULL) AS
BEGIN
   DECLARE @pos        int,
           @nextpos    int,
           @valuelen   int

   SELECT @pos = 0, @nextpos = 1

   WHILE @nextpos > 0
   BEGIN
      SELECT @nextpos = charindex(', ', @list, @pos + 1)
      SELECT @valuelen = CASE WHEN @nextpos > 0
                              THEN @nextpos
                              ELSE len(@list) + 1
                         END - @pos - 1
      INSERT @tbl (string)
         VALUES (substring(@list, @pos + 1, @valuelen))
      SELECT @pos = @nextpos
   END
  RETURN
END

我有桌子

id --- name --- age

1 --- Dan --- 20

2 --- Chris --- 30

3 --- Andy --- 20

当我尝试执行select in语句时，它仅返回逗号分隔字符串中名字的所有值

SELECT * FROM table  
WHERE name IN (SELECT string COLLATE DATABASE_DEFAULT FROM [dbo].[func_ParseString]('Dan, Andy')

仅在我要返回第1行和第3行时才返回第1行

有人可以帮忙吗？