Use the coalesce() function. (coalesce returns the first non-null value in its list)
Specifically
ORDER BY coalesce("TO", 0), "FROM"
If you have records in "TO" column whose values is LESS then 0, then you need to replace 0 with
something that sorts BEFORE the first most value that your TO result can return.
Terry Fielder
Manager Software Development and Deployment
Great Gulf Homes / Ashton Woods Homes
terry@greatgulfhomes.com
Fax: (416) 441-9085
> -----Original Message-----
> From: pgsql-sql-owner@postgresql.org
> [mailto:pgsql-sql-owner@postgresql.org]On Behalf Of T E Schmitz
> Sent: Sunday, September 19, 2004 10:58 AM
> To: pgsql-sql@postgresql.org
> Subject: [SQL] ORDER BY and NULLs
>
>
> Hello,
>
> I am using PostgreSQL 7.4.2 and as I understand NULL values
> always sort
> last.
>
> However, I have a table from which select using two numerical
> sort keys
> "FROM" and "TO". "TO" might be NULL and I would like to display those
> rows first (without sorting the column in descending order).
>
> Is there any way this can be achieved without inserting bogus values
> into that column?
>
> --
>
>
> Regards/Gruß,
>
> Tarlika Elisabeth Schmitz
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>