Question

我有一个查询;

select ProductID,  name, (unitPrice*quantity) As 'Stock Equity'
from tproduct
group by productID with rollup
;

我希望这返回一组行，最后一行是Total的计算，而不是重复最后的结果？

任何人都可以告诉我为什么以及如何克服这个问题？

这是目前的查询结果;

ProductID    Name           Stock Equity
1            cannon 600 D   3360
2            cannon 550 D   1000
3            cannon 500 D   750
4            cannon 5D      5000
5            cannon 650 D   9000
6            Nikon D5100    1000
7            Nikon D3200    420
8            Nikon D7000    2700
9            Nikon D800     6030
10           Nikon D90      4770
null         Nikon D90      4770

Answer 1

您可以使用UNION ALL：

select ProductID,  name, (unitPrice*quantity) As 'Stock Equity'
from tproduct
union all
select 'total', 'total', sum(unitPrice*quantity)
from tproduct

请参阅SQL Fiddle with Demo

或者您可以使用以下内容：

select case when ProductID is null then 'total' else ProductId end Productid,  
  case when ProductID is null then 'total' else name end name, 
  sum(unitPrice*quantity) As 'Stock Equity'
from tproduct
group by ProductID with rollup

请参阅SQL Fiddle with Demo

Answer 2

select ProductID,  
       name, 
       (unitPrice*quantity) As 'Stock Equity',
       (select sum(unitPrice*quantity) from tproduct) As total
from tproduct
group by productID

添加总行数

2 个答案: