From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Joseph Shraibman <jks(at)p1(dot)selectacast(dot)net> |
Cc: | jhunt(at)chac(dot)qld(dot)edu(dot)au, "pgsql-sql(at)postgresql(dot)org" <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: isnull |
Date: | 2000-03-31 01:43:00 |
Message-ID: | 200003310143.UAA03317@candle.pha.pa.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-sql |
> Julie Hunt wrote:
>
> > Yes, you're right. I remember attempting to do an outer left join using the
> > nullif but without success so I used the case function instead with success.
> > Maybe someone else knows more about nullif and why it doesn't seem to work.
> >
> > Regards,
> > Julie
> >
>
> I've actually taken a closer look at the web page and not only did the name change,
> but I now notice that they change what it is supposed to do as well. It does work
> as currently defined, but I needed something that does what the original
> documentation said:
>
> IFNULL(input,non-NULL substitute)
> return second argument if first is NULL
> Example: IFNULL(c1, 'N/A')
>
New function is COALESCE. It returns the first non-null argument.
--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
From | Date | Subject | |
---|---|---|---|
Next Message | Wilson Fletcher | 2000-03-31 05:16:29 | RE: Loading values in from postgreSQL database into a combo box using PHP |
Previous Message | Julie Hunt | 2000-03-31 01:10:42 | Re: isnull |