Grokking Database Fundamentals for Tech Interviews
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Single Level Indexing
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Single-level indexing is a simple and direct method of organizing data to facilitate efficient retrieval. It maps index entries directly to the location of records in a database, making lookups faster and more structured. This indexing technique includes primary, secondary, and clustered indexes.

Below, we will explain each index type, along with relevant examples and illustrations to deepen your understanding.

Primary Index

A primary index is created on the primary key of a table, which uniquely identifies each record

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Table of Contents

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