1. The Ins and Outs of Indexes
Indexing Basics in SQL Server
Mindy Curnutt
TMW Systems, Inc.
VP, Information Management
SQL Server MVP

2. About Me VP, Information Management, TMW
3X SQL Server/Data Platform MVP
Idera Ace
SQL Server since 6.5 / 1995 (20 Years)
PASS Summit Speaker, 2005,
PASS Program Manager

3. Thank You Idera! My speaking to you today was made possible through
the Idera ACE program.

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5. Agenda
Objectives
Clustered Indexes
Non Clustered Indexes

6. Objectives Understand how to create effective and efficient indexes
Clustered Index
Learn what are they and why important?
Non Clustered Indexes
When and how are they used?
What are Included Columns?
Uniqueness
Why you should care

7. Types of Indexes The Basics Clustered Non Clustered Unique
Getting Fancy (not in this presentation)
Filtered
Full-Text
Spatial
XML

8. Agenda
Objectives
Clustered Indexes
Non Clustered Indexes

9. Clustered Indexes
Clustered Index – sort order of the data within the table on the hard drive and in memory.
One per table

10. Clustered Indexes Desired Qualities Narrow Data Type Unique Static
Increasing

11. Clustered Indexes Narrow Data Type Less Data Duplicated Smaller…
Databases
Backups
Maintenance Plan Times
Scans

12. Clustered Indexes Unique Not Required Prevents Uniqueifier
Best to be Narrow…remember?

13. Clustered Indexes Static Changes cause…
Additional overhead for Non Clustered Indexes
Clustered Index Fragmentation
A Bit of Advice?
Bad Idea

14. Clustered Indexes Increasing Data is added to the end of the index
Reduces fragmentation

15. Clustered Indexes Demos No Clustered Index (Heap)
Non Unique Clustered Index
Unique Clustered Index

16. Agenda
Objectives
Clustered Indexes
Non Clustered Indexes

17. Non Clustered Indexes For Common Queries
Link to Clustered Indexes or Heap through Key or RID
Bookmark Lookup

18. Bookmark (Key/RID) Lookup

19. Non Clustered Indexes
Demo
Bookmark (Key/RID) Lookup
Covering Index

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Mindy Curnutt
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