Question

我有两张桌子

ITEMLOC:
ITEM  LOC  STOCK

ORDERS:
ORDNO  ITEM  LOC  QTY

我希望看到以下结果：

ITEM  LOC  SUMofOrderQty  SUMofStock

如何从两个表中获取聚合以比较商品和位置上的Stock和OrderedQty

Answer 1

SELECT l.item,
       l.loc,
       l.sum_of_stock,
       o.sum_of_qty
FROM   (
         SELECT   item, loc, SUM( stock ) AS sum_of_stock
         FROM     item_loc
         GROUP BY item, loc
       ) l
       INNER JOIN
       (
         SELECT   item, loc, SUM( qty ) AS sum_of_qty
         FROM     orders
         GROUP BY item, loc
       ) o
       ON ( l.item = o.item AND l.loc = o.loc )
WHERE  l.sum_of_stock >= o.sum_of_qty

Answer 2

Select a.ITEM, a.LOC, a.SUMofOrderQty, SUMofStock from
(Select ITEM  LOC , Sum ( QTY)
FROM ORDERS
ITEM, LOC 
) a,

(Select ITEM, LOC  , Sum (STOCK) 
FROM ITEMLOC
group by ITEM, LOC ,
) b
Where a.ITEM=b.ITEM
AND b.LOC= a.LOC

抱歉打字错误

Answer 3

另一种方式

Select ITEM, LOC, SUM(q),SUM(s)
FROM (
Select ITEM , LOC , 0 q ,STOCK s
FROM ITEMLOC
Union
SELECT ITEM ,LOC, QTI q ,0 s
FROM ORDERS)
group by ITEM ,LOC

ITEM LOC必须是主键
如果不是：

Select ITEM, LOC, SUM(q),SUM(s)
FROM (
Select ITEM , LOC , 0 q ,sum(STOCK) s
FROM ITEMLOC
group by ITEM ,LOC
Union
SELECT ITEM ,LOC, sum(QTI) q ,0 s
FROM ORDERS
group by ITEM ,LOC)
group by ITEM ,LOC

Oracle - 从两个表聚合

3 个答案: