sql - Need to solve Group by - 


select wk_nbr,region_cd,plant_cd, pos_gap_1day    from(select wk_nbr,region_cd,plant_cd,         round((case when sum(gap_1day)>0 sum(gap_1day) else 0 end     ),2) pos_gap_1day                 table        group wk_nbr,region_cd,plant_cd)

in above query problem facing pos_gap_1day should sum positive numbers in column above query not give right answer since check sum(gap_1day)>0.

the problem need group wk_nbr,region_cd,plant_cd.

please suggest

try change

round((case when sum(gap_1day)>0 sum(gap_1day) else 0 end     ),2) pos_gap_1day

to

round(sum(case when sign(gap_1day) > 0 gap_1day else 0 end), 2) pos_gap_1day

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