Question

I have the following query

SELECT 
          c.cd,
          c.c_id 
FROM
          f f 
          INNER JOIN s s 
                    ON s.s_id = f.s_id 
          INNER JOIN c c 
                    ON c.c_id = s.c_id 
WHERE f.m_id = 2 
          AND f.deleted = 'no' 
GROUP BY s.c_id 
ORDER BY f.update_datetime DESC ;

Which returns a sample result set:

c.cd    c.c_id
moot    4
derp    5

I have another query based on the c.c_id of the above result set which iterates for each record in the above result set:

SELECT COUNT(*) as totals FROM s
WHERE c_id =?
AND status='good';

returns 7 when c_id=4 and returns 20 when c_id=5

Is there any way I can combine the two queries to form a result set like this?

c.cd    c.c_id  totals
moot    4       7
derp    5       20

Answer 1

Try this:

SELECT 
          c.cd,
          c.c_id,
          (SELECT COUNT(*) FROM  s WHERE c_id = c.c_id AND STATUS = 'good') totals 
FROM
          f INNER JOIN s  ON s.s_id = f.s_id 
          INNER JOIN c c ON c.c_id = s.c_id 
WHERE     f.m_id = 2 AND f.deleted = 'no' 
GROUP BY  s.c_id 
ORDER BY  f.update_datetime DESC ;