sql - 从多个表中选择 count(*)

Question

如何从两个不同的表(称为 tab1 和 tab2)中选择 count(*) ，结果为:

Count_1   Count_2
123       456

我已经尝试过这个:

select count(*) Count_1 from schema.tab1 union all select count(*) Count_2 from schema.tab2

但我所拥有的是:

Count_1
123
456

Answer 1

SELECT  (
        SELECT COUNT(*)
        FROM   tab1
        ) AS count1,
        (
        SELECT COUNT(*)
        FROM   tab2
        ) AS count2
FROM    dual