Query to combine two tables group by month - mysql

Question

I have tried to connect two tables by join and group them to get the count. But unfortunately, these two tables don't have any common value to join (Or I have misunderstood the solutions).
select date_format(check_in.date,'%M') as Month, count(check_in.Id) as checkInCount
from check_in
group by month(check_in.date);
Month
checkInCount
July
1
October
2
This is the first table.
select date_format(reservation.date,'%M') as Month, count(reservation.id) as reserveCount
from reservation
group by month(reservation.date);
Month
reserveCount
July
3
October
5
This is the second table.
I want to show these two tables in one table.
Month
checkInCount
reserveCount
July
1
3
October
2
5
Thank you for trying this and sorry if this is too easy.

Answer 1

You will need to join the result by month from your two subqueries.
This query assume all the month (July, August, September...) present in your subqueries monthCheckInStat, monthCheckOutStat, even if the count is 0
SELECT monthCheckInStat.Month, monthCheckInStat.checkInCount, monthCheckOutStat.reserveCount
FROM
(
select date_format(check_in.date,'%M') as Month, count(check_in.Id) as checkInCount
from check_in
group by month(check_in.date)
) monthCheckInStat
INNER JOIN
(
select date_format(reservation.date,'%M') as Month, count(reservation.id) as reserveCount
from reservation
group by month(reservation.date)
) monthCheckOutStat
ON monthCheckInStat.Month = monthCheckOutStat.Month;