Re: dumb question

Something like:

select max(id) from yourtable where sts=0 and ref_id is null;

That assumes that ref_id is null. It would help to see your table structure
and the query you tried that doesn't work. If ref_id is actually a
character string then you might need ref_id='' or coalesce(ref_id,'')='' if
it can be null or empty string.

Cheers,
Steve

On Thu, Jun 2, 2016 at 10:16 AM, Steve Clark <steve(dot)clark(at)netwolves(dot)com>
wrote:

> Hi List,
>
> I am a noob trying to do something that seems like it should be easy but I
> can't figure it out.
>
> I have a table like so:
>
> id | ref_id | sts
> ------------------
> 1 | | 0
> 2 | 1 | 1
> 3 | | 0
> 4 | | 0
> 5 | 4 | 1
> 6 | | 0
> 7 | 6 | 1
>
> I want to find the max(id) whose sts is 0 but whose id is not referenced
> by ref_id.
>
> so the answer would be id=3.
>
> Thanks for any pointers,
> Steve
>
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