如何合並兩個查詢

Question

我有兩個疑問

1)

select Year , Month, Sum(Stores) from ABC ;

2) 
select Year, Month , Sum(SalesStores) from DEF ; 

我想要這樣的結果：

 **Year, Month , Sum(Stores), Sum(SalesStores)**

我該怎么做 ？

我嘗試了Union＆Union all

select Year , Month, Sum(Stores) from ABC union
select Year, Month , Sum(SalesStores) from DEF ; 

我在輸出中僅看到3列

Year, Month Sum(Stores).

這是表格：

Year, Month Stores

Year Month SalesStores

有什么辦法可以以我想要的格式查看結果？

Answer 1

因為我不知道他們的關系，所以我更喜歡使用UNION ALL 。

SELECT  Year, 
        Month, 
        MAX(TotalStores) TotalStores, 
        MAX(TotalSalesStores) TotalSalesStores
FROM
        (
            SELECT  Year, Month, 
                    SUM(Stores) TotalStores, 
                    NULL TotalSalesStores 
            FROM    ABC
            UNION ALL
            SELECT  Year, Month, 
                    NULL TotalStores, 
                    SUM(SalesStores) TotalSalesStores 
            from    DEF 
        ) a
GROUP   BY Year, Month

Answer 2

您可以按以下方式UNION它們：

SELECT Year , Month, Sum(Stores)  As Stores, NULL As SalesStores from ABC 

UNION

SELECT Year , Month,  NULL As Stores, Sum(Stores) As SalesStores from ABC 

或在邏輯允許的情況下使用UNION ALL 。

Answer 3

嘗試：

SELECT Year, Month, SUM(TotalStores) as TotalAllStores, SUM(TotalSalesStore) as TotalAllSalesStore
FROM
(
 SELECT Year , Month, Sum(Stores) as TotalStores, 0 as TotalSalesStore from ABC union
 UNION ALL
 SELECT Year, Month , 0 as TotalStores, Sum(SalesStores) as TotalSalesStore from DEF 
) SalesByYearMonth
GROUP BY Year, Month

Answer 4

我將這樣使用FULL OUTER JOIN ：

SELECT ISNULL(x.[Year], y.[Year]) AS [Year],
ISNULL(x.[Month], y.[Month]) AS [Month],
x.Sum_Stores,
y.Sum_SalesStores
FROM (select Year , Month, Sum(Stores) AS Sum_Stores from ABC ...) AS x
FULL OUTER JOIN (select Year, Month , Sum(SalesStores) AS Sum_SalesStores from DEF ...) AS y
ON x.[Year] = y.[Year] AND x.[Month] = y.[Month]