Solved

SQL query to compile a list of game scores, eliminating progress scores, to sort by highest first

Posted on 2010-08-26
4
383 Views
Last Modified: 2013-11-05
I have a table that looks roughly like this (see attached). The "score" is a cumulative score. So I only want the last score entry for the game (games are identified by the "code" column, all records with the same "code" are part of the same game). The score I am looking for will have the most recent timestamp, and it should also be the highest score for the game (since negative scores are never produced).

So I basically want a list of "top 10 high scores". I'm not sure how to do this since all the non-last scores are in the table. I'm guessing some kind of grouping is necessary.

Thank you in advance for any assistance!
timestamp,code,score,question,answer
7/16/2010 2:40:28 PM,466163992316,0,673,False
7/16/2010 2:41:02 PM,466163992316,0,673,False
7/16/2010 2:41:11 PM,466163992316,0,673,False
7/16/2010 2:43:11 PM,466163992316,0,673,False
7/16/2010 4:56:05 PM,466163992316,78,1212,True
7/16/2010 4:56:05 PM,466163992316,78,1212,True
7/16/2010 5:00:02 PM,466163992316,0,2064,False
7/16/2010 5:00:03 PM,466163992316,0,2064,False
7/16/2010 10:21:50 PM,466163992316,0,2166,False
7/17/2010 11:59:12 AM,466163992316,74,1695,True
7/18/2010 10:27:33 PM,246810,60,9,True
7/18/2010 10:27:40 PM,246810,134,2,True
7/18/2010 10:27:44 PM,246810,222,3,True
7/18/2010 10:27:48 PM,246810,310,1,True
7/18/2010 10:27:51 PM,246810,400,5,True
7/18/2010 10:28:00 PM,246810,464,6,True

Open in new window

0
Comment
Question by:bbdesign
4 Comments
 
LVL 16

Expert Comment

by:vdr1620
ID: 33532907
Try using Rank Function as in below code

SELECT Top 10 * FROM
(
SELECT * , Rank () OVER (Partition By Code Order by Timestamp Desc) RankNo
)
WHERE RankNo = 1
ORDER BY ....
0
 
LVL 42

Accepted Solution

by:
dqmq earned 500 total points
ID: 33532929
select code, max(timestamp), max(score) group by code
order by max(score) desc
limit 10
0
 
LVL 1

Expert Comment

by:snoy
ID: 33532968
Hi,

what you mean by latest scores?
'coz if you wanna list the top 10 highest score there is no timestamp needed so a simple TSQL Select top 10.... will be enough

Can you give more explantions?

10x
H.Y.
www.w3consulting.ma
0
 

Author Comment

by:bbdesign
ID: 33533491
It looks like its that simple, thank you! I always get confused with grouping.
0

Featured Post

Simplifying Server Workload Migrations

This use case outlines the migration challenges that organizations face and how the Acronis AnyData Engine supports physical-to-physical (P2P), physical-to-virtual (P2V), virtual to physical (V2P), and cross-virtual (V2V) migration scenarios to address these challenges.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
OSQL to execute sql command 26 26
How to union three related tables in one flat file? 8 48
sql server query 12 26
Help With SQL Query 9 33
Introduction SQL Server Integration Services can read XML files, that’s known by every BI developer.  (If you didn’t, don’t worry, I’m aiming this article at newcomers as well.) But how far can you go?  When does the XML Source component become …
Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
Via a live example combined with referencing Books Online, show some of the information that can be extracted from the Catalog Views in SQL Server.
Viewers will learn how to use the SELECT statement in SQL and will be exposed to the many uses the SELECT statement has.

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question