The Ins and Outs of Indexes Indexing Basics in SQL Server Mindy Curnutt Mindy Curnutt & Associates Consulting Microsoft Data Platform MVP Twitter: @sqlgirl
About Me Independent Consultant 3X SQL Server/Data Platform MVP Idera Ace 2016-2017 SQL Server since 6.5 / 1995 (22 Years) PASS Summit Speaker, 2005, 2012-2015 PASS Program Manager 2015-2017 Twitter: @sqlgirl Email: mindycurnutt@hotmail.com
Thank You Idera! My speaking to you today was made possible through the Idera ACE program.
Agenda Objectives Clustered Indexes Non Clustered Indexes
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
Types of Indexes The Basics Clustered Non Clustered Unique Getting Fancy (not in this presentation) Filtered Full-Text Spatial XML
Agenda Objectives Clustered Indexes Non Clustered Indexes
Clustered Indexes Clustered Index – sort order of the data within the table on the hard drive and in memory. One per table
Clustered Indexes Desired Qualities Narrow Data Type Unique Static Increasing
Clustered Indexes Narrow Data Type Less Data Duplicated Smaller… Databases Backups Maintenance Plan Times Scans
Clustered Indexes Unique Not Required Prevents Uniqueifier Best to be Narrow…remember?
Clustered Indexes Static Changes cause… Additional overhead for Non Clustered Indexes Clustered Index Fragmentation A Bit of Advice? Bad Idea
Clustered Indexes Increasing Data is added to the end of the index Reduces fragmentation
Clustered Indexes Demos No Clustered Index (Heap) Non Unique Clustered Index Unique Clustered Index
Agenda Objectives Clustered Indexes Non Clustered Indexes
Non Clustered Indexes For Common Queries Link to Clustered Indexes or Heap through Key or RID Bookmark Lookup
Bookmark (Key/RID) Lookup
Non Clustered Indexes Demo Bookmark (Key/RID) Lookup Covering Index
Questions? Mindy Curnutt Twitter: @sqlgirl Email: mindycurnutt@hotmail.com