Welcome to this document I will sharing everything I’ve learned about Databases. I hope this resource helps you deepen your understanding and enhances your skills.

Table of contents :

Revision :

Before diving into the core concepts of databases, it's essential to revise some fundamental ideas.

What is the difference between Data, Information, Knowledge, Wisdom?

• Data: Raw, unstructured facts that, by themselves, don't have much meaning.
• Information: When data is processed and analyzed, it becomes information, which has more meaning and context.
• Knowledge: As we understand the information further, it becomes knowledge—a deeper understanding of the facts.
• Wisdom: Applying knowledge in practical situations results in wisdom, allowing us to make informed decisions.

This hierarchy can be represented as :

What is the difference between Data Structure & Database?

In short:

• Data structures help organize data in memory for temporary, efficient access.
• Databases manage large, persistent data sets and provide mechanisms for querying, updating, and securing the data over time.

Introduction :

What is Database ?