Re: How do you compare (NULL) and (non-NULL)?

Bruno Wolff III wrote:
> On Tue, Oct 26, 2004 at 16:23:20 -0400,
> Wei Weng <wweng(at)kencast(dot)com> wrote:
>
>>In the following query
>>
>>SELECT Parent FROM Channels ORDER BY Parent ASC;
>>
>>If I have a couple of (NULL)s in the field [Parent], they will be listed at
>>the bottom of the query result.
>>
>>Is it because PostgreSQL considers (NULL) as the biggest value? If I run
>>the same query under MSSQL Server 2000, I get the exact opposite result
>>regarding the order of (NULL)s and (non-NULL) values. They are listed at
>>the very beginning of the query result.
>
>
> If the order matters, you can order by IS NULL or IS NOT NULL.
>
> ---------------------------(end of broadcast)---------------------------
> TIP 9: the planner will ignore your desire to choose an index scan if your
> joining column's datatypes do not match
>
>

How do I write that?

Thanks

Wei