Andrew - Supernews wrote:
> On 2006-01-24, Will Glynn <wglynn@freedomhealthcare.org> wrote:
>
>>You might try:
>>
>>SELECT some_column
>> FROM some_table
>> GROUP BY some_column
>> HAVING SUM(CASE WHEN sort_order=1 THEN 1 ELSE 0 END) = 0;
>
>
> SELECT some_column
> FROM some_table
> GROUP BY some_column
> HAVING every(sort_order <> 1);
>
> every() is in 8.1 at least (can't recall when it was introduced); it's the
> same as bool_and(), i.e. an aggregate that returns true only if all inputs
> are true. Why isn't there a corresponding any(), I wonder? (bool_or does
> exist)
Unfortunately we still use 7.4, but I realized this morning that this
should work too (not tried yet):
SELECT some_column
FROM some_table
GROUP BY some_column
HAVING MIN(sort_order) > 1;
As our sort_orders start from 1.
--
Alban Hertroys
alban@magproductions.nl
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