在XML中包含空白标记

Question

使用下面的SQL查询我正在生成如下所示的XML文件。

SELECT CAST((SELECT         
(
   SELECT                               
        ICase,
        DPCRef                          
   FROM 
      #HD HD WHERE HD.OrdRef=PICK.OrdRef
   GROUP BY        
        ICase,
        DPCRef 

   FOR XML PATH('HD'), TYPE
 ),
 (
    SELECT      
         PCode, 
         SOLnNt,
         (
                SELECT   SSCCRef 
                FROM    #SSCC LM
                WHERE   LD.OrdRef = LM.OrdRef AND LD.PCode=LM.PCode
                GROUP BY 
                  SSCCRef
                FOR XML PATH(''), ROOT('SSCC'), TYPE
         ) 
    FROM    #LD LD
    WHERE   LD.OrdRef = PICK.OrdRef
    GROUP BY 
         PCode,   
         SOLnNt

    FOR XML PATH('LD'), TYPE
) 
FROM    #PICK PICK
GROUP BY OrdRef
    FOR XML PATH('PICK'), ROOT('PickOrder')) AS XML)  AS OrdersPickingConfirmationXML  

结果：

<PICK>
    <HD>
      <CustCode>PAV001</CustCode>
      <OrdRef>813804</OrdRef>      
    </HD>
    <LD>
      <PCode>PROD0001</PCode>
      <Rotation>14/D004193</Rotation>      
      <SSCC>
        <SSCCRef>TEST 1</SSCCRef>
        <SSCCRef>TEST1</SSCCRef>
      </SSCC>
    </LD>
</PICK>

有时候#SSCC表中没有数据。那时SSCC标签没有显示在XML中。如果没有数据，我需要将其显示为</SSCC>。无论如何，我可以得到空白标签</SSCC>