Two where condition for same column using group by

Question

I am having two tables, t1, t2. My tables and expected result are given below. My table schema is in sqlfiddle

t1:

id    branch_name
1     branch1
2              


        

Answer 1

E.g.

SELECT x.*
     , COALESCE(sent,0) sent
     , COALESCE(received,0) received
  FROM t1 x
  LEFT 
  JOIN 
     ( SELECT from_br
            , SUM(vqty) sent
         FROM t2
        GROUP
           BY from_br
     ) a
    ON a.from_br = x.id
  LEFT
  JOIN
     ( SELECT to_br
            , SUM(vqty) received
         FROM t2
        GROUP
           BY to_br
     ) b
    ON b.to_br = x.id
 ORDER
    BY id;

http://sqlfiddle.com/#!9/af0973/21