sql database index

oracle table access by index rowid

How to work Oracle Table Access by Index Rowid

Before explaining Oracle table access by index rowid, I would like to explain a bit about what is rowid and how it is used in the Oracle database. The table ...

Asiri Gunasena

June 10, 2024

oracle index full scan

2 Reasons to Why Oracle Index Full Scan

An Oracle index full scan is Oracle start read block from ROOT and then navigating to the down branch until find the leaf block on the left side. Move to ...

Asiri Gunasena

May 27, 2024

oracle index skip scan

How to Oracle Index Skip Scan Works | New From 9i

Oracle quickly fetches data by using an Index. There are different scan methods including Oracle index skip scan. If you have a composite index in the table, then this is ...

Asiri Gunasena

May 13, 2024

Sql Index usage

Poor SQL Index Usage including Good Examples

When making performance improvements in your database SQL Index Usage is one of the most valuable and essential features. SQL Indexes are used to retrieve data from databases by reducing ...

Asiri Gunasena

March 13, 2023

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