[英]Counting using JOIN in Bigquery
I have two sets A and B. I want to display counts of A as well as counts on A (intersection) B using condition X.我有两组 A 和 B。我想使用条件 X 显示 A 的计数以及 A(交叉点)B 的计数。
Code I am using我正在使用的代码
SELECT COUNT(A) as total, COUNT(IF (condition_X)) as chg
FROM A
FULL OUTER JOIN B
ON JOIN KEY Y
I am able to get the intersection but not the count of A in total.我能够得到交叉点,但不能得到 A 的总数。
Perhaps you just want a cross join
?也许你只是想要一个
cross join
?
select *
from (select count(*) as cnt_a from a) a cross join
(select count(*) as cnt_b
from a join
b
on y
where condition
) b
Simply left join the two只需离开加入两者
Select count(A.id=B.id),
count(A.id)
from A left join B on A.id=B.id
where condition='x'
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