On Tuesday 24 Apr 2012, Andreas Kretschmer wrote: > Emi Lu <em...@encs.concordia.ca> wrote: > > Good morning, > > > > May I know is there a simple sql command which could return missing > > numbers please? > > > > For example, > > > > t1(id integer) > > > > values= 1, 2, 3 .... 5000000 > > > > select miss_num(id) > > from t1 ; > > something like > > ,----[ code ] > > | test=# select * from emi_lu ; > | > | i > | > | --- > | > | 1 > | 2 > | 3 > | 5 > | 6 > | 8 > | 9 > | > | (7 rows) > | > | Time: 0,246 ms > | test=*# select * from generate_Series(1,10) s left join emi_lu on > | (s=emi_lu.i) where i is null; > | > | s | i > | > | ----+--- > | > | 4 | > | 7 | > | > | 10 | > | > | (3 rows)
Nice one, but curious about how would this perform if the numbers in question extended into 7 figures or more? Regards, -- Raj -- Raj Mathur || r...@kandalaya.org || GPG: http://otheronepercent.blogspot.com || http://kandalaya.org || CC68 It is the mind that moves || http://schizoid.in || D17F -- Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-sql
