Creating Indexes-sql server 2012 web

I have a site that displays nordic ski and cross-country running results and, in times of high volume, the results render slowly.  I would like to know how to optimize the query and set indexes.  We did this with my fitness events database but  now I need to do that with the cc meet database and I am not sharp enough to do it alone.  Here is a query to start with:
			sql = "SELECT r.LastName, r.FirstName, t.TeamName, r.RosterID, r.Gender, ir.RaceTime, ir.Excludes, ir.TeamPlace, ir.Bib "
            sql = sql & "FROM Roster r INNER JOIN Grades g ON r.RosterID = g.RosterID INNER JOIN IndRslts ir ON r.RosterID = ir.RosterID "
            sql = sql & "INNER JOIN Teams t ON t.TeamsID = r.TeamsID WHERE ir.RacesID = " & lRaceID & " AND ir.Place <> 0 AND ir.RaceTime <> '00:00' "
			sql = sql & "ORDER BY ir.Place"

Open in new window


What do you need to know about the tables in order to help me?  Sorry for asking a similar question but I just am having a hard time bridging the two.
Bob SchneiderCo-OwnerAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

plusone3055Commented:
i do not believe in this situation its about changing the syntax of the query you listed above. It looks pretty tight.
 Its about optimizing the tables by creating indexes on the tables.


it doesn't take long at all :)
http://msdn.microsoft.com/en-us/library/ms186342.aspx




http://msdn.microsoft.com/en-us/library/ms190457.aspx

and a great video
https://www.youtube.com/watch?v=ITcOiLSfVJQ
0
plusone3055Commented:
Sorry use the top link first :)

i do not believe in this situation its about changing the syntax of the query you listed above. It looks pretty tight.
 Its about optimizing the tables by creating indexes on the tables.


it doesn't take long at all :)
http://msdn.microsoft.com/en-us/library/ms186342.aspx




http://msdn.microsoft.com/en-us/library/ms190457.aspx

and a great video
https://www.youtube.com/watch?v=ITcOiLSfVJQ
0
Scott PletcherSenior DBACommented:
The critical thing is to get the best clustered index on each table.  Everything else with indexes is secondary to that.

Iow, you get the clustering right, you'll get at least decent performance overall no matter what else you do.  Get the clustering wrong, you'll get poor performance overall until/unless you create lots of covering indexes.


Based on the very limited info so far, you could cluster the tables as follows:

Cluster keys for tables:
Roster  by  RosterID
Grades  by  RosterID --maybe an additional column, unknown at this time
--can't tell for sure, likely the first but maybe the second:
IndRslts  by  ( RacesID, RosterID ) OR ( RosterID, RacesID )
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.

HainKurtSr. System AnalystCommented:
check these indexes first...

Roster > RosterID
Grades > RosterID
IndRslts > RosterID, RacesID
Teams > TeamsID
0
Vitor MontalvãoMSSQL Senior EngineerCommented:
Would help if you can post the structure of the tables and respective PK, FK and Indexes. The Query Execution Plan would be useful as well.
At least you need to have indexes created on FK's and on columns used in the WHERE clause as well in the ORDER clause.

Assuming that Place and RaceTime can only have positive values I would change the '<>' to '>', like this:
			sql = "SELECT r.LastName, r.FirstName, t.TeamName, r.RosterID, r.Gender, ir.RaceTime, ir.Excludes, ir.TeamPlace, ir.Bib "
            sql = sql & "FROM Roster r INNER JOIN Grades g ON r.RosterID = g.RosterID INNER JOIN IndRslts ir ON r.RosterID = ir.RosterID "
            sql = sql & "INNER JOIN Teams t ON t.TeamsID = r.TeamsID WHERE ir.RacesID = " & lRaceID & " AND ir.Place > 0 AND ir.RaceTime > '00:00' "
			sql = sql & "ORDER BY ir.Place"

Open in new window

0
Bob SchneiderCo-OwnerAuthor Commented:
I guess I just need to learn how to create indexes.  I have PK-FK constraints in place and it sounds like my query is good so I will go ahead and learn this before posting back.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft SQL Server

From novice to tech pro — start learning today.