Re: Using AND in query

[Thomas Kellerer <spam_eater@xxxxxxx>]

Alban Hertroys wrote on 08.08.2010 10:46:
> On 7 Aug 2010, at 23:18, Thomas Kellerer wrote:
>
> > Or as an alternative:
> >
> > SELECT tid, purchase_date
> > FROM orders
> > WHERE item in ('Laptop', 'Desktop')
> > GROUP BY tid, purchase_date
> > HAVING count(*) = 2
>
>
> This one is incorrect, it will also find people who bought two laptops or two desktops on the same date.

Right. I didn't think about that ;)

> But I think David's solution is more readable, as it leaves the item names in tact.

I absolutely agree. Another example of PG's cool array handling :)

Regards
Thomas




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