Skip to Main Content
Troubleshooting Oracle Performance, Second Edition
book

Troubleshooting Oracle Performance, Second Edition

by Christian Antognini
June 2014
Intermediate to advanced content levelIntermediate to advanced
740 pages
23h 59m
English
Apress
Content preview from Troubleshooting Oracle Performance, Second Edition

CHAPTER 14

image

Optimizing Joins

When a SQL statement references several tables, the query optimizer has to determine, in addition to the access path for each table, which order the tables are joined in and which join methods are used. The goal of the query optimizer is to minimize the amount of processing by filtering out unneeded data as soon as possible.

This chapter starts by defining key terms and explains how the three basic join methods (nested loops join, merge join, and hash join) work. Some advice follows on how to choose the join methods. Finally, the chapter describes optimization techniques such as partition-wise joins and star transformation. ...

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

Troubleshooting Oracle Performance

Troubleshooting Oracle Performance

Christian Antognini
Oracle Wait Interface: A Practical Guide to Performance Diagnostics & Tuning

Oracle Wait Interface: A Practical Guide to Performance Diagnostics & Tuning

Richmond Shee, Kirtikumar Deshpande, K Gopalakrishnan
Expert Oracle Exadata, Second Edition

Expert Oracle Exadata, Second Edition

Martin Bach, Karl Arao, Andy Colvin, Frits Hoogland, Randy Johnson, Kerry Osborne, Tanel Poder

Publisher Resources

ISBN: 9781430257585Purchase book