Porting from Oracl to Postgres

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Porting from Oracl to Postgres
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* Porting from Oracl to Postgres
@ 2003-09-05 04:24  Jomon Skariah <jomons@aztec.soft.net>
  0 siblings, 2 replies; 4+ messages in thread

From: Jomon Skariah @ 2003-09-05 04:24 UTC (permalink / raw)
  To: pgsql-sql




Hi,

Thanks for your replys.

We are facing another problem now.

we need to find an alternative for Oracle's ADD_MONTHS in PostGres..


Regards

Jomon





-----Original Message-----
From: Rod Taylor [mailto:rbt@rbt.ca]
Sent: Friday, September 05, 2003 1:20 AM
To: Jomon Skariah
Cc: pgsql-sql@postgresql.org
Subject: Re: MINUS & ROWNUM in PostGres


> 1) 	Do we have a replacement in PostGres for MINUS operator of Oracle .

I believe MINUS is non-standard word for EXCEPT, correct?
	
> 2	Also I need to find an alternative for ROWNUM in oracle..

If you are looking for a unique identifier, try using the OID.




^ permalink  raw  reply  [nested|flat] 4+ messages in thread

* Re: Porting from Oracl to Postgres
@ 2003-09-05 13:57  Rod Taylor <rbt@rbt.ca>
  parent: Jomon Skariah <jomons@aztec.soft.net>
  1 sibling, 1 reply; 4+ messages in thread

From: Rod Taylor @ 2003-09-05 13:57 UTC (permalink / raw)
  To: Jomon Skariah <jomons@aztec.soft.net>; +Cc: pgsql-sql

On Fri, 2003-09-05 at 00:24, Jomon Skariah wrote:
> 
> Hi,
> 
> Thanks for your replys.
> 
> We are facing another problem now.
> 
> we need to find an alternative for Oracle's ADD_MONTHS in PostGres..

Guessing based on the name that it adds a quantity of months to a
timestamp.  How about an SQL Interval?

now() + interval '15 months'

List of functions:
http://www.postgresql.org/docs/7.3/interactive/functions.html

Attachments:

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^ permalink  raw  reply  [nested|flat] 4+ messages in thread

* Re: Porting from Oracl to Postgres
@ 2003-09-05 14:12  Richard Huxton <dev@archonet.com>
  parent: Jomon Skariah <jomons@aztec.soft.net>
  1 sibling, 0 replies; 4+ messages in thread

From: Richard Huxton @ 2003-09-05 14:12 UTC (permalink / raw)
  To: Jomon Skariah <jomons@aztec.soft.net>; pgsql-sql

On Friday 05 September 2003 05:24, Jomon Skariah wrote:
> Hi,
>
> Thanks for your replys.
>
> We are facing another problem now.
>
> we need to find an alternative for Oracle's ADD_MONTHS in PostGres..

SELECT now() + '1 hour'::interval;
SELECT now() + '2 days'::interval;
SELECT now() + '3 months':: interval;

See the data-types section of the manual for details.

-- 
  Richard Huxton
  Archonet Ltd



^ permalink  raw  reply  [nested|flat] 4+ messages in thread

* Re: Porting from Oracl to Postgres
@ 2003-09-05 14:29  Jeff Eckermann <jeff_eckermann@yahoo.com>
  parent: Rod Taylor <rbt@rbt.ca>
  0 siblings, 0 replies; 4+ messages in thread

From: Jeff Eckermann @ 2003-09-05 14:29 UTC (permalink / raw)
  To: Jomon Skariah <jomons@aztec.soft.net>; +Cc: pgsql-sql


--- Rod Taylor <rbt@rbt.ca> wrote:
> On Fri, 2003-09-05 at 00:24, Jomon Skariah wrote:
> > 
> > Hi,
> > 
> > Thanks for your replys.
> > 
> > We are facing another problem now.
> > 
> > we need to find an alternative for Oracle's
> ADD_MONTHS in PostGres..
> 
> Guessing based on the name that it adds a quantity
> of months to a
> timestamp.  How about an SQL Interval?
> 
> now() + interval '15 months'
> 
> List of functions:
>
http://www.postgresql.org/docs/7.3/interactive/functions.html

For compatibility in your application, you could do
something like:

CREATE FUNCTION add_months(date, integer) RETURNS date
AS '
SELECT ($1 + ( $2::text || ''
months'')::interval)::date;
' LANGUAGE 'sql';

I second the recommendation to spend some time looking
over the available functions in PostgreSQL.

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^ permalink  raw  reply  [nested|flat] 4+ messages in thread

end of thread, other threads:[~2003-09-05 14:29 UTC | newest]

Thread overview: 4+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2003-09-05 04:24 Porting from Oracl to Postgres Jomon Skariah <jomons@aztec.soft.net>
2003-09-05 13:57 ` Rod Taylor <rbt@rbt.ca>
2003-09-05 14:29   ` Jeff Eckermann <jeff_eckermann@yahoo.com>
2003-09-05 14:12 ` Richard Huxton <dev@archonet.com>

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