How to create a Top 10 based on values from a database?

Question

I have a database table that stores scores for events, like a rating system.
Users choose an event they want to score, enter their score/rating and insert this into the database table.
This gives me, in my table:
Event - Rating - User
Soccer - 5 - Joe Public
Soccer - 4.5 - Jane Public
Tennis - 3 - Joe Public
...and so on.
I would like to do two things.  Firstly, I need to calculate the average for each event, which is easy enough, although I haven't quite got my head around the GROUP BY clause which, as I understand it, only allows me to use one database field?
Secondly, I would like to display, dynamically from the database, a list of top 10 events based on the results of the average ratings.
How easy is this to achieve?  I'm using ASP/VBScript and MSSQL database.
Appreciate any advice offered.  Thanks.
Regards
Nath.

Answer 1

Hi.  Here is what I've got, so far, to calculate the average:
SELECT     AVG(mgscore) AS mgAVGscore, mgmovieID, mgmovie, mgmovierelease
FROM         dbo.MGreviews
GROUP BY mgmovieID, mgmovie, mgmoviecert, mgmovierelease
How would I then run the RANK function?  Here's the example you provided:
SELECT RANK() OVER (ORDER BY Age) AS [Rank by Age],
       FirstName,
       Age
  FROM Person
I've tried this:
SELECT     RANK () OVER ORDER BY AVG(mgscore) AS mgAVGscore AS [Rank by Score], mgmovieID, mgmovie, mgmovierelease
FROM         dbo.MGreviews
GROUP BY mgmovieID, mgmovie, mgmoviecert, mgmovierelease
...but this produces the following error:
Error in list of function arguments: 'AS' not recognized.  Can you help?  I'm not sure I'm quite understanding how the RANK function works.
Much appreciate.
Regards
Nath.