Oracle SQL Tuning for Developers and DBAs

ORC-404 (3 Days)
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Oracle SQL Training Overview

This Oracle SQL Tuning for Developers and DBAs training class teaches attendees what the Oracle Cost Based Optimizer is doing with your SQL, and why it is doing it that way, and how to make the CBO do it better. Attendees learn how to reverse engineer the CBO’s decisions and experiment with alternatives, and then push the CBO towards better decisions.

Location and Pricing

Accelebrate courses are taught as private, customized training for groups of 3 or more at your site. In addition, we offer live, private online training for teams who may be in multiple locations or wish to save on travel costs. To receive a customized proposal and price quote for private on-site or online training, please contact us.

In addition, some courses are available as live, online classes for individuals. See a schedule of online courses.

Oracle SQL Training Objectives

All students will be able to:

  • Understand the concepts behind cost-based optimization
  • Capture and read execution plans
  • Gather various types of statistics
  • Tune the basic operations: join order, join method, access method
  • Use various index types
  • Exploit the possibilities for SQL transformations and rewrites
  • Apply a SQL tuning method

Oracle SQL Training Outline

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Study the SQL Execution Cycle
  • The parse-bind-execute-fetch steps
  • Identify statements that need tuning
  • The concepts behind cost-based optimization
Consider the Critical Decisions that Must be Made
  • Join order
  • Join method
  • Access method
  • The Filtered Rows Percentage tuning methodology
Capture and Understand Query Execution Plans
  • EXPLAIN PLAN and SQL*Plus Autotrace
  • SQL Trace
  • Te DBMS_MONITOR package
  • The DBMS_XPLAN package
  • Reading query execution plans
Gather Statistics
  • Object, system, and extended statistics
  • Dynamic sampling and SQL directives
  • Histograms
  • Column group statistics
How and When to Make Use of Various Index Types
  • B-tree indexes in all their forms
  • Bitmap and bitmap join indexes
  • Index use suppression - deliberate or otherwise
Determine When Different Join Methods and Access Methods are Appropriate
  • Nested loop and hash joins, and other methods
  • Scan access paths as opposed to indexed access paths
  • Direct and indirect read
Use Hints
  • Hints as an investigative tool
  • Using hints in production
  • Commonly used (and abused) hints
Appreciate the Possibilities for Query Re-writes and CBO Transformations
  • Equivalent SQLs
  • View merging
  • Star transformations
  • Correlated sub-queries
  • Set operators
  • Implications of null values
Understand the Possibilities for Reoptimization and Various Adaptive Capabilities
  • Execution plan stability
  • Adaptive reoptimization and adaptive execution plans
  • Adaptive cursor sharing and bind variables
The Methodology
  • Calculate optimal join orders and methods
  • Look for common programmer errors
  • Recognize problematic SQL structures and operations
  •  Validate statistics
Conclusion
Request Pricing for Oracle SQL Tuning for Developers and DBAs
Lecture percentage

50%

Lecture/Demo

Lab percentage

50%

Lab

Course Number:

ORC-404

Duration:

3 Days

Prerequisites:

  • Understanding of Oracle database and instance architecture
  • Familiarity with SQL and basic PL/SQL
  • Able to work with Linux command-line tools

Training Materials:

All Oracle training students receive comprehensive courseware and a related textbook.

Software Requirements:

  • Intel dual-core i5 or faster processor on a 64-bit operating system with at least 8 GB RAM
  • A complete installation of Oracle
  • Please contact us for detailed setup instructions if you have purchased this class.

Contact Us:

Accelebrate’s training classes are available for private groups of 3 or more people at your site or online anywhere worldwide.

Don't settle for a "one size fits all" public class! Have Accelebrate deliver exactly the training you want, privately at your site or online, for less than the cost of a public class.

For pricing and to learn more, please contact us.

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