how about
select date, ln, mbrid, ds, (
select sum(ds) from t2
where t2.date >= t1.date and t2.date <= t1.date + '5 days'::interval
and t1.ln = t2.ln
and t1.mbrid = t2.mbrid)
from t1
That'll give you both the plus and minus (in two different columns), but
it might sum up the same row from table2 multiple times so I'm not sure
its correct.
And I'm not sure the date range is correct.
Another way to look at the same thing:
select date, ln, mbrid, dsplus - dsminus
from (
select date, ln, mbrid, ds as dsplus, (
select sum(ds) from t2
where t2.date >= t1.date and t2.date <= t1.date + '5 days'::interval
and t1.ln = t2.ln
and t1.mbrid = t2.mbrid) as dsminus
from t1
) as x
where dsplus - dsminus <> 0
Totally guessing here.
-Andy
