Question

The first select is

select user_id, count(*) as count
from users
where referrer IS NOT NULL
group by referrer
order by count DESC

Then based off the records returned by that query I need to get the date for the user who referred the users in the above query.

select user_id from users where token = IDS_FROM_LAST_QUERY

I know I could use a sub query and say where IN (subquery) but I’m getting tripped up trying to keep the count from the subquery.

So in the end I need the following info

user_id, count

Answer 1

select o.user_id user_id, count(*) count
from users o
join users i on o.token = i.user_id
where i.referrer is not null
group by referrer
order by count desc