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Supported SQL Statements and Extensions : Explain Plan
  

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Explain Plan

Purpose

Retrieves a detailed list of the elements in the execution plan. It generates a result set with a single column named OPERATION. The individual elements that comprise the plan are returned as rows in the result set.

Syntax

EXPLAIN PLAN FOR {SELECT ... | DELETE ... | INSERT ... | UPDATE ...}
The returned list of elements includes the indexes used for performing the query and can be used to optimize the query.