RE: Iterations in a SELECT

how about using BETWEEN?

select * from tablename where datefield between '2001-01-01' and
'2001-05-05';

or if you're looking for dates outside the period

select * from tablename where datefield NOT between '2001-01-01' and
'2001-05-05';

(i'm assuming your list of dates has no gaps in it, could be wrong!)

hth,
tamsin



-----Original Message-----
From: pgsql-novice-owner@postgresql.org
[mailto:pgsql-novice-owner@postgresql.org]On Behalf Of Scott Muir
Sent: 18 July 2001 03:08
To: pgsql-novice@postgresql.org
Subject: [NOVICE] Iterations in a SELECT


I have a small problem which I'm looking for an elegant solution to...

I'm trying to put together a select where a list dates is compared to a
period to identify dates which aren't in the list...

I could just create a list of days in a table (like 20 years worth) and then
compare it, but I'm wondering if there is a trick where one could get
results like this

select (for i := 1 to 5) as number;

or

select i as number from for(i,1,5);

and get something like

number
------
1
2
3
4
5

Any suggestions?
Thanks
Scott.


---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?

http://www.postgresql.org/users-lounge/docs/faq.html