Sum results from two different queries (SQL)

Question

I have two queries from two different tables. One is made using SUM function and the other was made using COUNT function. What I need is to sum their results so I can get one table with total records (such as Table "C").

So far, I've tried this join but it is not working:

select a.origin, count(*) as received, sum(b.contacts) as sent
from bd.received a 
left join db.sent b
on a.origin=b.origin
group by b.origin 

Table A (Received Contacts)

select count(*), origin from db.received group by origin

   Origin Count(*)
   Email    500
   Phone    200 
   Social   100

Table B (Sent Contacts)

select sum(contacts), origin from db.sent group by origin

   Origin Sum(*)
   Email    20
   Phone   100

Table C (Total Contacts)

   Origin Total
   Email   520
   Phone   300
   Social  100

Answer 1

You could union all each counting query in a derived table/subquery like so:

select 
    origin
  , Received = sum(ReceivedCount)
  , Sent     = sum(SentCount)
  , Total    = sum(ReceivedCount)+sum(SentCount)
from (
  select origin, ReceivedCount = count(*), SentCount=0
  from bd.received
  group by origin
  union all
  select origin, ReceivedCount = 0, SentCount=count(*)
  from db.sent
  group by origin
  ) s
group by origin