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Module 1 – What Is a Database

Module 2 – Database Modeling

Module 3 – Normalization

Why Normalization Exists
First Normal Form (1NF)
Second Normal Form (2NF)
Third Normal Form (3NF)
BCNF
When to Break Normalization
Denormalization
Exercise: Bad Model to Good Model

Module 4 – Creating a Database

CREATE DATABASE
CREATE TABLE
Data Types
AUTO_INCREMENT
DEFAULT
NULL
NOT NULL
UNIQUE
CHECK
ENUM
COMMENT
Exercise: Create Full Database

Module 5 – Table Relationships

One to One
One to Many
Many to Many
Foreign Key
ON DELETE CASCADE
ON DELETE RESTRICT
ON DELETE SET NULL
Exercise: Student ↔ Course

Module 6 – DML – Data Manipulation

INSERT
UPDATE
DELETE
TRUNCATE
Exercise: Populate Database

Module 7 – SELECT – Basic Queries

SELECT
WHERE
ORDER BY
LIMIT
DISTINCT
LIKE
IN
BETWEEN
IS NULL
Aliases

Module 8 – SQL Functions

COUNT
SUM
AVG
MAX
MIN
ROUND
CONCAT
UPPER
LOWER
SUBSTRING
LENGTH
DATE Functions
NOW
DATEDIFF

Module 9 – JOIN

INNER JOIN
LEFT JOIN
RIGHT JOIN
CROSS JOIN
SELF JOIN
Exercise: JOIN Practice

Module 10 – Grouping

GROUP BY
HAVING
Aggregate Functions

Module 11 – Subqueries

Subquery
EXISTS
NOT EXISTS
IN (subquery)
ANY
ALL

Module 12 – Advanced SQL

UNION
UNION ALL
CASE
IF()
COALESCE

Module 13 – Views

CREATE VIEW
Updatable View
Views and Security

Module 14 – Stored Procedures

Stored Procedures
Procedure Parameters
IF in Procedures
LOOP
Cursors

Module 15 – Triggers

BEFORE INSERT
AFTER INSERT
BEFORE UPDATE
AFTER DELETE
Exercise: Audit Log

Module 16 – Transactions

COMMIT
ROLLBACK
ACID
Isolation Levels

Module 17 – Indexes

Primary Index
Unique Index
Composite Index
Fulltext Index
EXPLAIN
How Indexes Work
Exercise: Index Performance

Module 18 – Optimization

Bad Queries
Good WHERE Clauses
JOIN Optimization
LIMIT and Pagination
Covering Index

Module 19 – Backup

mysqldump
Restore
Import
Export

Module 20 – Security

SQL Injection
Prepared Statements
Privileges
Database Users
Backup Strategy

Module 21 – Serious Database Design

Design: Webshop
Design: Hotel (detailed)
Design: CRM
Design: School System

Module 22 – Real-World Examples

WeldPilot – Welder Management
Apartment Booking
GPS Fleet Tracking
E-Learning Platform
CRM (BrainTech)

Module 23 – Mistakes & Final Project

VARCHAR(255) for Everything
Missing Foreign Keys
Multiple NULL Pitfalls
Poor Table Names
Unnecessary Duplicate Columns
Too Many JOINs
SELECT *
Final Project: Hotel System

Module 7 – SELECT – Basic Queries Lesson

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