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Learn T-SQL Querying - Second Edition

You're reading from Learn T-SQL Querying - Second Edition

Product type Book

Published in Feb 2024

Publisher Packt

ISBN-13 9781837638994

Pages 456 pages

Edition 2nd Edition

Languages

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

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

Why subscribe?

17. Other Books You May Enjoy

Troubleshooting Live Queries

During our career as a database professional, we likely encounter cases where a runaway query takes hours to complete or doesn’t even complete by any reasonable time measurement. How do we troubleshoot cases such as this?

A query execution plan can help provide a conclusive explanation of query performance issues. But to get a query execution plan there is one requirement a long-running query can’t easily meet: query completion.

If the query takes a long time to complete or never actually does, then how can we troubleshoot these cases? And what happens if we take that production query back to our development server and it runs fine? That means there is a set of conditions that can only be reproduced in the production server, be that the size of the database, the data distribution statistics, or even the availability of resources such as memory or CPU. Therefore, the ability to analyze a query execution plan while the query is executing...

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Authors (2)

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

Pam 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 Pam Lahoud

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