SQL动态列

Question

 select @cols =

                STUFF((SELECT ',' + QUOTENAME(grade)         
                from #temp        
                group by grade        

        FOR XML PATH(''), TYPE        
        ).value('.', 'NVARCHAR(MAX)')         
    ,1,1,'')        

  select @colsRollup = STUFF((SELECT ', Sum(' + QUOTENAME(grade) + ') as '+QUOTENAME     (grade)        
                from #temp       
                group by grade        

        FOR XML PATH(''), TYPE        
        ).value('.', 'NVARCHAR(MAX)')         
    ,1,1,'')    

  set @query    

      =      'SELECT * into #temp3 from 
             (
              SELECT lob as "Vertical", '+ @colsRollup + '       
              FROM        
                  (        
                    SELECT lob,' + @cols + ' from         
                        (        
                         select lob,        
                           grade,        
                           asso_count        
                           from #temp        
                         ) x         
                     pivot         
                          (        
                           count(grade)        
                           for grade in (' + @cols + ')        
                           ) p         
                  ) x1 
                    GROUP BY lob with ROLLUP)x2'        

         execute(@query) 

我正在尝试创建动态列并将其插入临时表中。 但是它会抛出一个错误，说＃temp3不是有效的对象名。如果我不尝试将动态生成的列插入表中，代码将起作用。

Answer 1

如果您执行代码，然后尝试访问#temp3表，如：

execute(@query)
select * from #temp3

我认为它将超出范围，这将解释错误消息。 您可以尝试修改查询以包含SELECT之类的内容：

SET @query = '
 SELECT * INTO #temp3 FROM
   (
   SELECT lob as "Vertical", '+ @colsRollup + '       
   FROM        
     (        
      SELECT lob,' + @cols + ' from (select lob, grade, asso_count from #temp) x
      PIVOT (count(grade) for grade in (' + @cols + ')) p         
      ) x1 
      GROUP BY lob with ROLLUP
     ) x2; SELECT * FROM #temp3'      

请注意最后一行现在包含; SELECT * FROM #temp3

如果你添加，你应该得到结果，如果这是你想要的。