Order by attribute in child table
Hi all,
I've been thinking about it, and I'm a bit stumped, and wondered if
anyone here could help.
I have two tables, an albums and a photos table. An album contains
many photos. I want to get a list of albums ordered by the most
recent photo in the album. Basically, I want to be able to order
albums by the latest creation date of a photo in the album.
How would one go about doing that? I was thinking a correlated
subquery of some sort, but I've never have seen an example to use it
right after ORDER BY and I can't seem to get it to work myself.
As an alternative, perhaps it would be easier to update a new field in
the albums table called "last_uploaded_on" that gets timestamped on
every upload, and "order by" on that?
Thanks in advance.
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