Just a shot in the dark.. it may be wrong, but try it out..
"SELECT avg(rating) AS avgrating FROM ratings WHERE parent_id = '$id' ORDER BY avgrating DESC LIMIT 10"
try that out.. should work.
metin
At 04:06 PM 6/18/2003 -0400, chris wrote:
I've done a google search, but most of the results are for the part I've already figured out. People that have the "top 10" sorting usually want money for their system (one wanted an absurd $500).
I'm working on a database application where users vote on how much they like a particular picture. All of the picture information is in one table, and all of the votes are within another table. The picture table's auto incrementing id is referenced in the ratings table.
Displaying the actual average rating of a particular photograph is easy enough:
"SELECT avg(rating) FROM ratings WHERE parent_id = '$id'"
But how the heck would one select the top $n entries, ordered by the average of the photo's ratings? Ideally, I'd like the query to work in both MySQL and PostgreSQL.
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