Sql 動態行轉列 pivot

 

最近朋友有個需求：將產品中為“期刊”的書品以行轉列的形式展現，同時需要關聯工單主表及工單明細表，顯示內容為，工單號、操作日期、產品名稱及數量，由於期刊的產品數量較多，靜態的雖然可以實現，但不利於后續內容的添加，就想着如何能以動態的形式展現，自動拼接sql語句處理，具體實現過程如下。

 產品信息表需用到的字段內容：

select ProductCode,Name  from ComProduct where ProductType ='20'

 

工單需要用到的內容：

select JobNo,ProductCode,Quantity  from WmsJobDtl 

 通過搜索資料，終於完成動態拼接SQL語句，具體的存儲過程如下：

CREATE PROCEDURE 期刊核算匯總表

as 
begin


DECLARE @sql VARCHAR(8000)
DECLARE @COLUMN VARCHAR(8000)
 
SELECT @sql= ISNULL(@sql+',','')+ '['+ProductName+']'
    ,@COLUMN= ISNULL(@COLUMN,'')+', '+ProductName 


FROM (select wj.JobNo ,wj.StockDate, a.ProductName ,sum(wjd.Quantity) as TQty   from 
(select ProductCode,  Name as ProductName  
from ComProduct   where  ProductType ='20' ) as a 
inner  join  WmsJobDtl wjd on a.ProductCode = wjd.ProductCode
inner join WmsJob  wj on wj.JobNo = wjd.JobNo
where wj.Status = 'X'  
group by wj.JobNo ,wj.StockDate, a.ProductName) as cc 
GROUP BY ProductName           
 
SET @sql=' select  *  from
(select wj.JobNo ,wj.StockDate, a.ProductName ,sum(wjd.Quantity) as TQty   from 
(select ProductCode,  Name as ProductName  
from ComProduct   where  ProductType =''20'' ) as a 
inner  join  WmsJobDtl wjd on a.ProductCode = wjd.ProductCode
inner join WmsJob  wj on wj.JobNo = wjd.JobNo
where wj.Status = ''X''  
group by wj.JobNo ,wj.StockDate, a.ProductName
) as  dddd  pivot (max(TQty) for ProductName in ('+@sql+'))a'
 
exec   (@sql)

end

 

可惜，沒有解決NULL值得問題，如有能解決的朋友，歡迎留言，非常感謝。