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.

Ups.. It seems there are no reviews for this training yet! Go on and be the first to write a review!