Question

OrderDetailID   OrderID ProductID   Quantity
1                10248    11          12
2                10248    42          10
3                10248    72           5
4                10249    14           9
5                10249    51          40

我想总结每个OrderID的所有数量，之后我需要总计所有数量。我能够创建不同的查询

SELECT OrderID, SUM(Quantity) over ()AS TotalItemsOrdered
FROM OrderDetails
where OrderID in ('10248','10249')
group by OrderID;

和

SELECT SUM(Quantity) over ()AS TotalItemsOrdered
FROM OrderDetails
where OrderID in ('10248','10249');

但我想加入两个查询以显示相同的结果。请教我如何加入查询和显示相同的结果。谢谢

Answer 1

我想你想要这个：

SELECT OrderID, SUM(Quantity) as OrderQuantity,
       SUM(SUM(Quantity)) OVER () as TotalItemsOrdered
FROM OrderDetails
WHEER OrderID in ('10248','10249')
GROUP BY OrderID;

Answer 2

不确定为什么你会想要这种格式...通常的方式是按组分组，然后总计是GROUP BY ROLLUP - 这应该存在于大多数数据库产品中。

使用以下Oracle语法：

with inputs ( OrderDetailID, OrderID, ProductID, Quantity ) as (
       select 1, 10248, 11, 12 from dual union all
       select 2, 10248, 42, 10 from dual union all
       select 3, 10248, 72,  5 from dual union all
       select 4, 10249, 14,  9 from dual union all
       select 5, 10249, 51, 40 from dual
     )
-- end of test data; SQL query begins below this line
select   case grouping_id(orderid) when 1 then 'TOTAL' 
                                   else to_char(orderid) end as orderid,
         sum(quantity) as total_quantity
from     inputs
where    orderid in (10248, 10249)  --  assuming orderid is NUMBER, not VARCHAR
group by rollup (orderid)
order by orderid
;

ORDERID  TOTAL_QUANTITY
-------  --------------
10248                27
10249                49
TOTAL                76

SQL：如何连接两个选择查询

2 个答案: