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Hash Join Processing (Doc ID 41954.1)

Last updated on MARCH 12, 2021

Applies to:

Oracle Database - Enterprise Edition - Version 8.1.7.4 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.

Purpose

This article explains some of the internal working of the Hash Join operation.

Scope

This article is aimed at users who are interested in discovering more about Hash Join processing

Details

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In this Document
Purpose
Scope
Details
 Processing
 Bitmap for unique join keys
 Poorly Performing Hash Joins - What to do about them?
References

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