如何比较两个sql查询值

Question

我有两个表 StockOutward 和产品 outward..我必须获取不等于 sum(qty) stockOutward 的 sum(qty)..

StockOutward

Id ProductId Qty Location Orderid 1 7 2 2 38 2 8 1 2 38 3 7 1 2 38

产品外向

Id ProductId Qty Location Orderid 1 7 12 2 38 2 8 1 2 38

我需要 stockoutward 的输出为 ProductId 7

我使用了以下查询

Select
    sum(qty) as Qty,ProductId 
from 
    StockOutward 
where 
    Orderid='38' 
group by 
    ProductId 

Union

Select 
    sum(qty) as Qty,
    ProductId 
from 
    ProductOutward 
where 
    Orderid='38' 
group by 
    ProductId

Answer 1

您可以使用JOIN 并过滤不等式：

SELECT
    s.ProductId
FROM (
    SELECT
        ProductId,
        SumQty = SUM(Qty)
    FROM StockOutward
    GROUP BY ProductId
)s
INNER JOIN (
    SELECT
        ProductId,
        SumQty = SUM(Qty)
    FROM ProductOutward
    GROUP BY ProductId
)p
    ON p.ProductId = s.ProductId
    AND p.SumQty <> s.SumQty

Answer 2

Select sum(qty) as Qty,ProductId from StockOutward where Orderid='38' group by ProductId 
except
Select sum(qty) as Qty,ProductId from ProductOutward where Orderid='38' group by ProductId