f1 sum_f1 avg_f1 pseudo_recno 10 10 10 1 20 30 15 2 30 60 20 3 40 100 25 4 50 150 30 5 60 210 35 6
I know I can do this by iterating with a plpgsql routine, but there must be a means simply using SQL
select f1 t1.f1, sum(t2.f1) as sum_f1, avg(t2.f1) as avg_f1, count(*) as pseudo_recno from ttt t1 join ttt t2 on (t2.f1<=t1.t1) group by t1.f1 order by t1.f1;
Regards, Tomasz Myrta
---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
