Skip to Main Content
Learn T-SQL Querying
book

Learn T-SQL Querying

by Pedro Lopes, Pam Lahoud
May 2019
Intermediate to advanced content levelIntermediate to advanced
484 pages
11h 23m
English
Packt Publishing
Content preview from Learn T-SQL Querying

Query Plan Comparison

Throughout their careers, database professionals are likely to encounter some of the following scenarios:

  • Troubleshooting point-in-time performance regressions. In other words, the scenario where a query had been meeting performance expectations, but after an event it started to slow down. Finding the root cause may uncover opportunities to prevent queries that avoid regressions from reoccurring.
  • Determining what the impact is of rewriting a T-SQL query. For example, when tuning a query, you may be required to rewrite it in part entirely. Does it actually perform better?
  • Determining the impact of changing or adding a schema object such as an index. We discussed how these may be required in the Indexing strategy section ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Learn T-SQL Querying - Second Edition

Learn T-SQL Querying - Second Edition

Pedro Lopes, Pam Lahoud
SQL Server T-SQL Recipes, Fourth Edition

SQL Server T-SQL Recipes, Fourth Edition

Jason Brimhall, Jonathan Gennick, Wayne Sheffield

Publisher Resources

ISBN: 9781789348811Supplemental Content