Re: MAX(column1),MAX(column2),...

From: "Travis Hoyt" <thoyt(at)npc(dot)net>
To: "Josh Berkus" <josh(at)agliodbs(dot)com>, "Bjarte Aagnes" <bjartea(at)student(dot)sv(dot)uio(dot)no>, <pgsql-sql(at)postgresql(dot)org>
Subject: Re: MAX(column1),MAX(column2),...
Date: 2002-04-15 20:17:10
Message-ID: DBEMKMGOMJAGKAKEPPEGEEJMDKAA.thoyt@npc.net
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-novice pgsql-sql

You could write a plpgsql function to select all the column names from the
one of the system tables and do max($myvar) for each of the column names
returned.

select attname from pg_stats where tablename = 'yourtablename';

Will get you the list of columns. Just write a loop the loop through each
one and do max().

Travis

-----Original Message-----
From: pgsql-sql-owner(at)postgresql(dot)org
[mailto:pgsql-sql-owner(at)postgresql(dot)org]On Behalf Of Josh Berkus
Sent: Monday, April 15, 2002 3:34 PM
To: Bjarte Aagnes; pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] MAX(column1),MAX(column2),...

Bjarte,

> How do I list all column names and maximum values for each column in
> a table.
> I can list the column names, but can't see how to get the maximum of
> each
> column without typing max(name) for every column.

That is exactly what you have to do. I do not understand the problem.
If you are looking for some way to save yourself typing the column
names, it doesn't exist.

-Josh Berkus

---------------------------(end of broadcast)---------------------------
TIP 6: Have you searched our list archives?

http://archives.postgresql.org

In response to

Responses

Browse pgsql-novice by date

  From Date Subject
Next Message Jeff Post 2002-04-15 21:53:48 Pl/Pgsql function troubles
Previous Message Josh Berkus 2002-04-15 19:34:14 Re: MAX(column1),MAX(column2),...

Browse pgsql-sql by date

  From Date Subject
Next Message Tom Lane 2002-04-15 20:36:57 Re: oid and oidvector
Previous Message Josh Berkus 2002-04-15 19:34:14 Re: MAX(column1),MAX(column2),...