如何在分组时，连接多个行数据

 
     
     select 
       
     * 
     
 
     FROM 
      
 ( 
     select 
       
     top 
       
     10 
      doccode, 
     max 
     (inserttime)  
     as 
      inserttime
   
     from 
      saletemplog 
   
     where 
      companyid 
     = 
     ' 
     A13 
     ' 
     
   
     and 
      stcode 
     = 
     ' 
     002 
     ' 
     
   
     and 
       
     len 
     (doccode) 
     > 
     30 
     
   
     group 
       
     by 
      doccode
 ) a
 
     OUTER 
      APPLY(
      
     SELECT 
      oldcode 
     = 
       
     STUFF 
     ( 
     REPLACE 
     ( 
     REPLACE 
     (
             (
                  
     SELECT 
      oldcode  
     FROM 
      saletemplog
                  
     WHERE 
      doccode  
     = 
      a.doccode
                  
     ORDER 
       
     BY 
      inserttime  
     asc 
     
                  
     FOR 
      XML AUTO
             ),  
     ' 
     <N oldcode=" 
     ' 
     ,  
     ' 
     , 
     ' 
     ),  
     ' 
     "/> 
     ' 
     ,  
     '' 
     ),  
     1 
     ,  
     1 
     ,  
     '' 
     )

 ) b
 
     order 
       
     by 
      inserttime  
     desc