與SUM計算嵌套查詢

Question

我想告訴這個查詢，因爲只有一個單元的總和，但使用UNION這裏的結果顯示爲這樣的合計金額

500 
    1000 

一列，但我想說明的總和這個記錄（1500）

這是我的查詢：

select sum(MAL_TASWYAHESAB.MADINMONY) as'Total Sum' from MAL_TASWYAHESAB 
union 
select sum(MAL_AMRSARF_OHAD.MONY) as'Total Sum' from MAL_AMRSARF_OHAD 

Answer 1

試試這個方法：

select (select sum(MAL_TASWYAHESAB.MADINMONY) from MAL_TASWYAHESAB) 
+ 
(select sum(MAL_AMRSARF_OHAD.MONY) from MAL_AMRSARF_OHAD) as 'Total Sum' 

Answer 2

SELECT SUM(TotalSum) AS Total 
FROM 
(
    select MAL_TASWYAHESAB.MADINMONY as 'TotalSum' from MAL_TASWYAHESAB 
    union 
    select MAL_AMRSARF_OHAD.MONY     from MAL_AMRSARF_OHAD 
) AS t 

Answer 3

select sum(MADINMONY) as'Total Sum' 
from (
    select MAL_TASWYAHESAB.MADINMONY 
    from MAL_TASWYAHESAB 
    union MAL_AMRSARF_OHAD.MONY 
    from MAL_AMRSARF_OHAD 
) AS X 

Answer 4

SELECT SUM(MADINMONY) as'Total Sum' 
FROM (
    SELECT MAL_TASWYAHESAB.MADINMONY 
    FROM MAL_TASWYAHESAB 
    UNION MAL_AMRSARF_OHAD.MONY 
    FROM MAL_AMRSARF_OHAD 
) AS a;