On Tue, May 19, 2009 17:02, Andy Colson wrote:
>
> so: select max(name), type from food group by type
> works cuz we only get one name (the max name) back for each type.
>
> or: select name, type from food group by type, name
> which in our example is kinda pointless, but still, give us the
> distinct
> items for "type, name".
Thanks. I think I am beginning to see this. So, if there are more
than one type for a given currency code and I do not select and
group by type then the having count(whatever) = 1 means that these
rows are not selected either. Is that correct?
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