Month 6 · Week 22 of 40

Advanced SQL & Database Normalization

Connect complex data models without redundancy.

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Week Overview

Learn how to eliminate duplicate data using normalization rules (1NF, 2NF, 3NF). Master multi-table INNER and LEFT JOINs, and extract insights with GROUP BY and aggregate functions.

Core Concepts & Topics

Database Normalization (1NF, 2NF, 3NF)
INNER JOIN, LEFT JOIN & Full Outer Joins
Aggregations (COUNT, SUM, AVG, MIN, MAX)
GROUP BY and HAVING Filters
Creating Database Indexes
Hands-On Challenge

Week 22 Project: E-commerce database schema design with normalized tables and reporting queries.

Every week at DoxaTech Hub requires submitting real working code tested by our automated grading suite. You will push code to your personal GitHub repository, open pull requests, and receive instant feedback.

Frequently Asked Questions

Why is 3NF database normalization important?

3NF eliminates data redundancy and prevents insert, update, and deletion anomalies, ensuring database consistency.

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Week 21: Relational Databases & SQL Foundations
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Week 23: Web Servers & Flask HTTP Routing
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Month 6 Modules

This week is part of Databases & Web APIs (SQL & Flask).

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Helpful Guides & Cheatsheets