Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Database Design - What are included columns with respect to SQL Server indexing?


Database Design - What are included columns with respect to SQL Server indexing?

Author
Message
Arjun SreeVastsva
Arjun SreeVastsva
SSCrazy
SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)SSCrazy (2.5K reputation)

Group: General Forum Members
Points: 2529 Visits: 1642
Database Design - What are included columns with respect to SQL Server indexing?
GilaMonster
GilaMonster
SSC-Forever
SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)

Group: General Forum Members
Points: 47388 Visits: 44399
Test question? Interview question?

Search in Books Online for 'Include columns' you should find several entries.


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


egpotus
egpotus
SSC-Enthusiastic
SSC-Enthusiastic (130 reputation)SSC-Enthusiastic (130 reputation)SSC-Enthusiastic (130 reputation)SSC-Enthusiastic (130 reputation)SSC-Enthusiastic (130 reputation)SSC-Enthusiastic (130 reputation)SSC-Enthusiastic (130 reputation)SSC-Enthusiastic (130 reputation)

Group: General Forum Members
Points: 130 Visits: 1278
What are included columns with respect to SQL Server indexing?
A new type of index was developed in SQL Server 2005 and beyond that assists in situations where a covering index is needed.
Indexes with Included Columns are non clustered indexes that have the following benefits:
1. Columns defined in the include statement, called non-key columns, are not counted in the number of columns by the database engine.
2. Columns that previously could not be used in queries, like nvarchar(max), can be included as a non-key column.
3. A maximum of 1023 additional columns can be used as non-key columns.


Kindest Regards,

egpotus DBA

Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search