从多个表中总结多个值

Question

我想要做一个SQL查询来获得总数，但我不知道如何构造这个查询。

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); 

我想总结这些结果只是一个查询，是一种方法来做到这一点？

谢谢大家。 ----- *

已回答。 但是，如果我想用多个common_fk来做到这一点？

Answer 1

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

或将所有5个结果：

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