mysql - Join and Group by Clause gives wrong output -


i have 2 table l columns (code, qtr, fy, limit) , r (code, qtr,fy,limit). want sum of limit of left , right table group code, qtr fy

the following query runs no error gives wrong output, can me in getting right output. if use 1 table works fine. guess problem join

select l.code, l. qtr, l.fy, sum(l.limit),sum(r.limit)  tbl l,tbl r l.code=r.code , l.qtr=r.qtr , l.fy=r.fy group l.code,l.qtr,l.fy

sample data ( table contains other column here m keeping selected)

tbl l                                         code    qtr,   fy   limit                     001      1      70    200                      001      1      70    700                      001       2     70    500     001       2     70    300  table r  code     qtr    fy    limit  001      1       70    1000  001      1       70    200  001      2       70    50  001      2       70    125   result  code   qtr    fy  sum(l.limit)    sum(r.limit)  001     1     70   900               1200  001     2     70   800               175

i m using mysql

try query:

select code, qtr, fy, sum(lsum), sum(rsum) ( select l.code, l.qtr, l.fy, l.limit lsum, 0 rsum l union select r.code, r.qtr, r.fy, 0 lsum, r.limit rsum r) combined group code, qtr, fy

using join in case wrong idea because create multiple records (one each match between l , r) , when sum incorrect results.


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