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Indexes and Query Execution Plan

Indexes and Query Execution Plan. CSED421: Database Systems Labs. Indexes. What is an Index?. Used to speed up the retrieval of rows Can reduce disk I/Os by using rapid path access method to locate the data quickly Independent of the table. Index, e.g., B-tree. Table.

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Objectives

Objectives. After completing this lesson, you should be able to do the following: Use the EXPLAIN PLAN command to show how a statement is processed Use the DBMS_XPLAN package Use the Automatic Workload Repository Query the V$SQL_PLAN performance view

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330 views • 22 slides

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Indexes and Query Execution Plan

Objectives