A majority of the application performance can be addressed or avoided by writing good quality SQL queries. Many-a-times, we underestimate the power of SQL writing techniques. We can write an SQL statement in many different ways to get the desired result set. The key lies in identifying the best SQL query amongst them. When an SQL query is submitted for execution, the DB2 optimizer rewrites the SQL in the most efficient way it can, but that does not mean we can get away with bad SQL queries. Inefficient SQL queries may confuse the optimizer, resulting in a suboptimal access plan. As a developer, we should always consider best practices in writing SQL queries. In this recipe, we will discuss some best practices that can help us write good quality SQL queries. We will also analyze the different ways of writing SQL statements, by comparing their access plans.
IBM DB2 9.7 Advanced Application Developer Cookbook
IBM DB2 9.7 Advanced Application Developer Cookbook
Overview of this book
With lots of new features, DB2 9.7 delivers one the best relational database systems in the market. DB2 pureXML optimizes Web 2.0 and SOA applications.
DB2 LUW database software offers industry leading performance, scale, and reliability on your choice of platform on various Linux distributions, leading Unix Systems like AIX, HP-UX and Solaris and MS Windows platforms. This DB2 9.7 Advanced Application Developer Cookbook will provide an in-depth quick reference during any application's design and development.
This practical cookbook focuses on advanced application development areas that include performance tips and the most useful DB2 features that help in designing high quality applications. This book dives deep into tips and tricks for optimized application performance.
With this book you will learn how to use various DB2 features in database applications in an interactive way.
Table of Contents (15 chapters)
IBM DB2 9.7 Advanced Application Developer Cookbook
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
Application Development Enhancements in DB2 9.7
DB2 Application Techniques
General Application Design
Procedures, Functions, Triggers, and Modules
Designing Java Applications
DB2 9.7 Application Enablement
Advanced DB2 Application Features and Practices
Preparing and Monitoring Database Applications
Advanced Performance Tuning Tips
Customer Reviews