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SQL Server 2016 Developer's Guide

You're reading from   SQL Server 2016 Developer's Guide Build efficient database applications for your organization with SQL Server 2016

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781786465344
Length 616 pages
Edition 1st Edition
Languages
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Authors (3):
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Dejan Sarka Dejan Sarka
Author Profile Icon Dejan Sarka
Dejan Sarka
Miloš Radivojević Miloš Radivojević
Author Profile Icon Miloš Radivojević
Miloš Radivojević
William Durkin William Durkin
Author Profile Icon William Durkin
William Durkin
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Toc

Table of Contents (15) Chapters Close

Preface 1. Introduction to SQL Server 2016 FREE CHAPTER 2. Review of SQL Server Features for Developers 3. SQL Server Tools 4. Transact-SQL Enhancements 5. JSON Support in SQL Server 6. Stretch Database 7. Temporal Tables 8. Tightening the Security 9. Query Store 10. Columnstore Indexes 11. Introducing SQL Server In-Memory OLTP 12. In-Memory OLTP Improvements in SQL Server 2016 13. Supporting R in SQL Server 14. Data Exploration and Predictive Modeling with R in SQL Server

Clustered columnstore indexes


In the last section of this chapter, you will learn how to manage a clustered columnstore index (CCI). Besides optimizing query performance, you will also learn how to add a regular B-tree nonclustered index (NCI) to a CCI and use it instead of the primary key or unique constraints. When creating the NCCI in the previous section, the LZ77 or the archive compression has not been used yet. You will use it with a CCI in this section. Altogether, you will learn how to do the following:

  • Create clustered columnstore indexes

  • Use archive compression

  • Add B-tree NCI to a CCI

  • Use B-tree NCI for a constraint

  • Update data in a CCI

Compression and query performance

Let's start by dropping both indexes from the demo fact table, the NCCI and the CI, to make a heap again:

USE WideWorldImportersDW; 
-- Drop the NCCI 
DROP INDEX NCCI_FactTest 
  ON dbo.FactTest; 
-- Drop the CI 
DROP INDEX CL_FactTest_DateKey 
  ON dbo.FactTest; 
GO 

Now let's create...

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