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Learn T-SQL Querying

You're reading from Learn T-SQL Querying A guide to developing efficient and elegant T-SQL code

Product type Paperback

Published in Feb 2024

Publisher Packt

ISBN-13 9781837638994

Length 456 pages

Edition 2nd Edition

Languages

SQL

Tools

SQL Server

Concepts

Database Administration

Authors (2):

Pedro Lopes

Pam Lahoud

View More author details

Table of Contents (18) Chapters

Preface

1. Part 1: Query Processing Fundamentals

2. Chapter 1: Understanding Query Processing FREE CHAPTER

3. Chapter 2: Mechanics of the Query Optimizer

4. Part 2: Dos and Don’ts of T-SQL

5. Chapter 3: Exploring Query Execution Plans

6. Chapter 4: Indexing for T-SQL Performance

7. Chapter 5: Writing Elegant T-SQL Queries

8. Chapter 6: Discovering T-SQL Anti- Patterns in Depth

9. Part 3: Assembling Our Query Troubleshooting Toolbox

10. Chapter 7: Building Diagnostic Queries Using DMVs and DMFs

11. Chapter 8: Building XEvent Profiler Traces

12. Chapter 9: Comparative Analysis of Query Plans

13. Chapter 10: Tracking Performance History with Query Store

14. Chapter 11: Troubleshooting Live Queries

15. Chapter 12: Managing Optimizer Changes

16. Index

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17. Other Books You May Enjoy

Introducing the Query Store

The requirement to track query performance statistics over time has been a longtime request by SQL Database Engine users because it unlocks the ability to go back in time and understand trends and point-in-time occurrences. Maybe a point-in-time issue with the database caused our company website to glitch, or a critical application slows down periodically without a predictable pattern, or we noticed that part of our workload is much slower after an upgrade to a new version of the SQL Database Engine. Barring any hardware problems, all these scenarios can usually be boiled down to one common cause – query plan optimization choices. This led to the creation of the Query Store – an effective flight recorder for our databases that’s available in SQL Server (starting with SQL Server 2016) and Azure SQL Database, including Managed Instance.

Recall what we discussed on the process of query optimization in Chapter 1, Understanding Query Processing...

The rest of the chapter is locked

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Authors (2)

Pedro Lopes

Pedro Lopes

Pedro Lopes is a Program Manager in the Database Systems group, based in Redmond, WA, USA. He has over 19 years of industry experience and has been with Microsoft for 9 years. He is currently responsible for program management of Database Engine features for in-market and vNext versions of SQL Server, with a special focus on the Relational Engine. He has extensive experience with query performance troubleshooting and is a regular speaker at numerous conferences such as SQLBits, PASS Summit, SQLIntersection, Microsoft Ignite, and Microsoft Build. He blogs about SQL on the SQL Server Team blog. He has authored several tools in the Tiger toolbox on GitHub: AdaptiveIndexDefrag maintenance solution, BPCheck, and usp_WhatsUp.

See other products by Pedro Lopes

Lahoud

Lahoud

Pam Lahoud is a Program Manager in the Database Systems group, based in Redmond, WA, USA. She has been with Microsoft for 13 years and is currently responsible for program management of Database Engine features for in-market and vNext versions of SQL Server, with a special focus on the Storage Engine area. She is passionate about SQL Server performance and has focused on performance tuning and optimization, particularly from the developer's perspective, throughout her career. She is a SQL Server 2008 Microsoft Certified Master (MCM) with over 20 years of experience working with SQL Server.

See other products by Lahoud

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