Book Image

SQL Server 2016 Developer's Guide

By : Miloš Radivojević, Dejan Sarka, William Durkin
Book Image

SQL Server 2016 Developer's Guide

By: Miloš Radivojević, Dejan Sarka, William Durkin

Overview of this book

Microsoft SQL Server 2016 is considered the biggest leap in the data platform history of the Microsoft, in the ongoing era of Big Data and data science. This book introduces you to the new features of SQL Server 2016 that will open a completely new set of possibilities for you as a developer. It prepares you for the more advanced topics by starting with a quick introduction to SQL Server 2016's new features and a recapitulation of the possibilities you may have already explored with previous versions of SQL Server. The next part introduces you to small delights in the Transact-SQL language and then switches to a completely new technology inside SQL Server - JSON support. We also take a look at the Stretch database, security enhancements, and temporal tables. The last chapters concentrate on implementing advanced topics, including Query Store, column store indexes, and In-Memory OLTP. You will finally be introduced to R and learn how to use the R language with Transact-SQL for data exploration and analysis. By the end of this book, you will have the required information to design efficient, high-performance database applications without any hassle.
Table of Contents (21 chapters)
SQL Server 2016 Developer's Guide
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
12
In-Memory OLTP Improvements in SQL Server 2016

Chapter 9. Query Store

Query Store is a new performance troubleshooting tool, fully integrated into the database engine. In my opinion, it is one of the best database engine features since 2005 and the introduction of OPTION (RECOMPILE). Query Store helps you to troubleshoot query performance by collecting information about queries, resource utilization, execution plans, and the other execution parameters. It is stored in a database and therefore it survives server crashes, restarts, and failovers.

Query Store does not only help you to identify issues with query executions, but also lets you easily and quickly fix or workaround problems caused by poorly chosen execution plans.

In this chapter, you will learn about the following points:

  • Why Query Store has been introduced

  • What Query Store is intended for and what it is not

  • Query Store Architecture

  • How Query Store can help you to quickly identify and solve some performance issues