Combine results of two unrelated queries into single view

Question

Is it possible to combine the results of two separate (unrelated) sql queries into a single view. I am trying to total some figures for users and count the views for videos

Answer 1

If you want the results next to each other in separate columns you can simply SELECT a list of queries:

SELECT ( select count(*) from video where monthname(views) = 'May') AS May_CT
      ,( select sum(sessions) from user where user_id = 6) AS User_Sum

If you want the results stacked in one column:

select count(*) from video where monthname(views) = 'May'
UNION  ALL
select sum(sessions) from user where user_id = 6

The latter may require datatype conversion

Answer 2

SELECT t2.total_session,
       t1.watch_count
FROM
  (SELECT 1 AS common_key,
          count(*) AS watch_count
   FROM video
   WHERE monthname(views) = 'May') AS t1
JOIN
  (SELECT 1 AS common_key,
               sum(sessions) AS total_session
   FROM USER
   WHERE user_id = 6) AS t2 ON t1.common_key = t2.common_key;

Ofcourse, this will be very efficient only when the output in both t1 and t2 is one row.