请问，IN 运算符可以这么用吗?

CREATE PROC up_myp
@IDS nvarchar(2000)
AS
SELECT * FROM UserInfo WHERE UserID in (@IDS)

go


---------------------------
up_myp '1,2 '

/*
服务器: 消息 245，级别 16，状态 1，过程 up_myp，行 4
将 nvarchar 值 '1,2 ' 转换为数据类型为 int 的列时发生语法错误。
*/

[解决办法]
CREATE PROC up_myp
@IDS nvarchar(2000)
AS
exec ( 'SELECT * FROM UserInfo WHERE UserID in ( '+@IDS+ ') ')

go

[解决办法]
UserID为数值型.
SELECT * FROM UserInfo WHERE UserID in (@IDS)
UserID为字符型.
declare @sql as varchar(100)
set @sql = 'SELECT * FROM UserInfo WHERE UserID in ( ' ' ' + @IDS + ' ' ') '
exec(@sql)