On 6/2/2016 11:10 AM, Steve Clark wrote:
> Thanks all the below seem to do the trick.
>
> On 06/02/2016 01:58 PM, David G. Johnston wrote:
>> select max(id) from yourtable where sts=0 and id not in (select
>> ref_id from yourtable);
>
> select max(id) from yourtable where sts=0 and id not in (select ref_id
> from yourtable);
>
do note, this is whats known as an 'anti-join', and these can be pretty
expensive on large tables.
--
john r pierce, recycling bits in santa cruz