Is it bad to have a non-clustered index that contains the primary key from the clustered index?

Posted by Don on Stack Overflow See other posts from Stack Overflow or by Don
Published on 2010-04-30T20:00:32Z Indexed on 2010/04/30 20:07 UTC
Read the original article Hit count: 204

Filed under:

sql-server

|

indexing

|

clustered-index

If you have a table with a clustered index on the Primary Key (int), is it redundant and bad to have one (ore more) non-clustered indexes that include that primary key column as one of the columns in the non-clustered index?

© Stack Overflow or respective owner

Related posts about sql-server

SQL SERVER – Beginning SQL Server: One Step at a Time – SQL Server Magazine

as seen on SQL Authority - Search for 'SQL Authority'
I am glad to announce that along with SQLAuthority.com, I will be blogging on the prominent site of SQL Server Magazine. My very first blog post there is already live; read here: Beginning SQL Server: One Step at a Time. My association with SQL Server Magazine has been quite long, I have written nearly… >>> More
How to install SQL Server 2005 Configuration Manager without installing SQL Server Management Studio

as seen on Server Fault - Search for 'Server Fault'
Hi, I need to configure SQL Server aliases on a public-facing production server. To do that, I need to install SQL Server Configuration Manager. I was not able to find a standalone installer for that, so I am having to install SQL Server 2005 Client Components. This approach is not ideal as we don't… >>> More
[MAJ] SQL Server 2005 Express Edition - La version gratuite de SQL Server 2005

as seen on ASP-PHP.net - Search for 'ASP-PHP.net'
Modification technique pour le site de l'article. >>> More
How to create SQL Server Express DB from SQL Server DB

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a SQL Server 2008 DB. I want to extract SOME tables (and associated schema, constraints, indexes, etc) and create a SQL Server Express DB. It isn't a sync of the target, we stomp on it. We ONLY need to do this in the file system (not across the wire). We are not fond of the synchronization… >>> More
sql server 2000 error, error trying to connect to sql server 2005

as seen on Stack Overflow - Search for 'Stack Overflow'
i am connecting to sql server 2000 on a remote computer with a dotnet application, but when i try to open the connection it gives the following error: When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections What… >>> More

Related posts about indexing

IIS6 Indexing Service indexing asp.net codebehind (.aspx.cs) files

as seen on Server Fault - Search for 'Server Fault'
I've setup a few catalogs on an Windows Server 2003 IIS6 install, each tracking files within a website. In the Properties - Generation Dialog for each catalog, 'Index files with unknown extensions' is turned OFF. 'Inherit above settings from Service' in that dialog is also turned off. However, the… >>> More
Outlook 2007 OST File Indexing and OneNote 2007 Indexing are Broken

as seen on Super User - Search for 'Super User'
I'm running Outlook 2007 under Windows 7 Home Premium RTM. My OST file was previously being properly indexed but eventually searches significantly slowed down so I suspected a problem. Searching and indexing appears broken in OneNote 2007 as well as search time is now significantly longer. I brought… >>> More
Indexing vs. no indexing when inserting records

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a few questions about whether or not it would be best to not use indexing. BACKGROUND: My records have a timestamp attribute, and the records will be inserted in order of their timestamps (i.e., inserted chronologically). QUESTIONS: If I DON'T use indexing is it typical for the database… >>> More
SQL SERVER – Transcript of Learning SQL Server Performance: Indexing Basics – Interview of Vinod Kumar by Pinal Dave

as seen on SQL Authority - Search for 'SQL Authority'
Recently I just wrote a blog post on about Learning SQL Server Performance: Indexing Basics and I received lots of request that if we can share some insight into the course. Here is 200 seconds interview of Vinod Kumar I took right after completing the course. We have few free codes to watch the course… >>> More
Can the Windows Indexing Service restart an app pool if it doesn't index the Web.Config?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am having a slight debate with a colleague of mine on this subject. Scenario: A web site has a sub directory that is indexed using the Windows Indexing Service. There is not a web.config in this directory and the indexing service is not indexing the parent directory which is the site root. Something… >>> More