從多個表中總結多個值

Question

我想要做一個SQL查詢來獲得總數，但我不知道如何構造這個查詢。

select count(*) from table1 where commom_fk in (1234); 
select count(*) from table2 where commom_fk in (1234); 
select count(*) from table3 where commom_fk in (1234); 
select count(*) from table4 where commom_fk in (1234); 
select count(*) from table5 where commom_fk in (1234); 

我想總結這些結果只是一個查詢，是一種方法來做到這一點？

謝謝大家。 ----- *

已回答。 但是，如果我想用多個common_fk來做到這一點？

Answer 1

SELECT  
     (SELECT ...) 
    + (SELECT ...) 
    + (SELECT ...) 
    + (SELECT ...) 
    + (SELECT ...)  
    AS sumAll 

或將所有5個結果：

SELECT  
     (SELECT ...) AS sum1 
    , (SELECT ...) AS sum2 
    , (SELECT ...) AS sum3 
    , (SELECT ...) AS sum4 
    , (SELECT ...) AS sum5