?
Solved

SQL primary key add INCLUDE column

Posted on 2009-07-15
8
Medium Priority
?
329 Views
Last Modified: 2012-05-07
I have a table with a GUID primary key, is it possible to add INCLUDE fields to this cluster index, if so could you give me the syntax to alter this index as I do not want to delete it this would effect existing relationships with other tables etc. I know it is possible to add include fields to other indexes.
0
Comment
Question by:freshnet
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
8 Comments
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24858806
Hope this helps:
CREATE TABLE test ( a uniqueidentifier PRIMARY key, b int, c int);
CREATE nonCLUSTERED INDEX ix_test ON test ( a) INCLUDE (b,c)

Open in new window

0
 
LVL 60

Expert Comment

by:chapmandew
ID: 24858846
BTW...if your primary key is clustered, you will not need to include a column. By default, all columns in a clustered index are "included"...so this would only apply to an NC primary key
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 24858857
rrjegan, your example really isn't applicable....by default the primary key is clustered unless you specify otherwise.
0
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.

 
LVL 57

Accepted Solution

by:
Raja Jegan R earned 2000 total points
ID: 24858945
>> rrjegan, your example really isn't applicable

I misread the question. Thanks for pointing it out.

freshnet,

>> is it possible to add INCLUDE fields to this cluster index
   No.. You cant create clustered index with INCLUDE clause.

Hope this clarifies.
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 24858955
No worries.  Just wanted to clear it up.  :)
0
 

Author Closing Comment

by:freshnet
ID: 31603708
but why is this do you think?
0
 
LVL 60

Expert Comment

by:chapmandew
ID: 24859653
pretty sure a split would have been necessary here....
0
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24859752
For your reference,

INCLUDE ( column [ ,... n ] )
    Specifies the non-key columns to be added to the leaf level of the nonclustered index. The nonclustered index can be unique or non-unique.
    Column names cannot be repeated in the INCLUDE list and cannot be used simultaneously as both key and non-key columns. Nonclustered indexes always contain the clustered index columns if a clustered index is defined on the table. For more information, see Index with Included Columns.

http://msdn.microsoft.com/en-us/library/ms188783.aspx

>> pretty sure a split would have been necessary here....

No concerns from my side as you directed me correctly.
0

Featured Post

Visualize your virtual and backup environments

Create well-organized and polished visualizations of your virtual and backup environments when planning VMware vSphere, Microsoft Hyper-V or Veeam deployments. It helps you to gain better visibility and valuable business insights.

Question has a verified solution.

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

Introduction This article will provide a solution for an error that might occur installing a new SQL 2005 64-bit cluster. This article will assume that you are fully prepared to complete the installation and describes the error as it occurred durin…
This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
In this video you will find out how to export Office 365 mailboxes using the built in eDiscovery tool. Bear in mind that although this method might be useful in some cases, using PST files as Office 365 backup is troublesome in a long run (more on t…
How to fix incompatible JVM issue while installing Eclipse While installing Eclipse in windows, got one error like above and unable to proceed with the installation. This video describes how to successfully install Eclipse. How to solve incompa…

765 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