Sql server SQL Server 2012从函数返回的动态查询调用

我有一个标量值[return type nvarchar]函数，它返回一个动态查询字符串。 让我的功能如下

CREATE FUNCTION ABC
(

)
RETURNS nvarchar(MAX)
AS
BEGIN
    return 'Select * from Table1'
END

Select * from dbo.ABC()

我想执行它如下

CREATE FUNCTION ABC
(

)
RETURNS nvarchar(MAX)
AS
BEGIN
    return 'Select * from Table1'
END

Select * from dbo.ABC()

或

在SQL Server 2012中是否可能做到这一点？ 我必须在不使用openquery的情况下完成它

-- My Actual Function --

ALTER FUNCTION [dbo].[RowToColumn]
(
    -- Add the parameters for the function here

)
RETURNS nvarchar(MAX)
AS
BEGIN
    DECLARE @PunchList nvarchar(MAX)
DECLARE @PunchListTOP nvarchar(MAX)
DECLARE @SQL nvarchar(MAX)
DECLARE @Flag INT
SET @PunchList = ''
SET @PunchListTOP = ''
DECLARE @I INT
SET @Flag = (select MAX(X) as MMAX from (select Employee_ID,Date_Of_Working, count(Date_Of_Working) as X from DataInOneRowStep3 group by Date_Of_Working ,Employee_ID ) A)
Set @I =1
WHILE (@I<= @Flag)
BEGIN
if (@PunchList = '' )
BEGIN
   Set @PunchList = 'Punch_' + CONVERT(varchar, @I)  
   Set @PunchListTOP = ' MAX(Punch_' + CONVERT(varchar, @I)  +') Punch_' + CONVERT(varchar, @I)
END
else
BEGIN
Set @PunchList = @PunchList + ',' + 'Punch_' + CONVERT(varchar, @I)     
Set @PunchListTOP =@PunchListTOP +','+ ' MAX(Punch_' + CONVERT(varchar, @I)  +') Punch_' + CONVERT(varchar, @I)
END
SET @I = @I + 1
END

SET @SQL ='SELECT Employee_Id,Date_OF_Working,Shift_Id,'+@PunchListTOP+' FROM (
    SELECT * from DataInOneRowStep4 
) as s
PIVOT
(
    MAX(EntryTime)
    FOR Punch IN ('+@PunchList+')
)AS piv group by  Employee_Id,Date_OF_Working,Shift_Id'


RETURN @SQL

END

---

您不能在用户定义的函数中返回NVARCHARMAX数据类型…再加上您想要执行上述操作的事实，使我怀疑您做错了什么…是时候了解表值用户函数了。从这里开始。好的。。。对不起，我不能理解。为什么我不能返回NVARCHARMAX？我已经这样做了，代码在Select dbo.ABCAL中运行良好，因此不能在udf中使用动态sql