Oracle Database 11g: Execution Plans and Star Transformations

Overview/Description
An execution plan is the output of the optimizer and is presented to the execution engine for implementation. The execution plan instructs the execution engine about the operations it must perform for retrieving the data required by a query most efficiently. This course explores gathering, displaying, and interpreting execution plans. It also covers the EXPLAIN PLAN command and the PLAN_TABLE, using AUTOTRACE, dynamic performance views that contain execution plan information, the Automatic Workload Repository (AWR), and SQL monitoring. The star schema is the simplest data warehouse schema. Defining a star schema and star transformation requirements, as well as star query plans without transformation and after transformation, are also covered.

Target Audience
Support engineers, developers, technical consultants, data warehouse developers, and application developers.

Prerequisites
Oracle Database 11g: Introduction to SQL Oracle Database 11g: SQL Fundamentals I

Expected Duration (hours)
2.0

Lesson Objectives

Oracle Database 11g: Execution Plans and Star Transformations

recognize how to gather execution plans

recognize how to display execution plans

recognize the views containing execution plan information

recognize how to use the AWR

recognize how to perform SQL monitoring

interpret execution plans

extract an execution plan used by the optimizer to execute a query

recognize how to use star transformation

use star transformation and access the benefits of using this optimizer technique