Gain insights into fundamental database concepts, relational databases, and entity-relationship diagrams. Learn about normalization techniques and basics of SQL to enhance database efficiency.

Databases are universal - they underlie the technology you use every day. They're a crucial component of everything from telecommunications systems, banking systems, and video games to just about any other software system that maintains some amount of persistent data.

In this course, you'll learn about the fundamental concepts of databases, why and when they're used, what relational databases are, and entity-relationship diagrams. You will also be exposed to techniques like normalization that help to increase the efficiency of databases. You'll wrap up with a look at the basics of Structured Query Language (SQL). 

After completing this course, you will be able to move onto more advanced courses involving database systems and SQL.

Database Design Fundamentals for Software Engineers

# The flight database

The flight database stores details about an airline’s fleet, flights, and seat bookings. Again, it’s a hugely simplified version of what a real airline would use, but the principles are the same.

Consider the following requirements list:

**Entities:**

* AIRPLANE entity

* FLIGHT entity

* PASSENGER entity

* BOOKING entity

**Attributes:**

* An airplane has a model number, a unique registration number, and the capacity to take one or more passengers.

* An airplane flight has a unique flight number, a departure airport, a destination airport, departure date and time, and arrival date and time.

* A passenger has a first name, surname, and unique email address.

**Relationships:**

* Each flight is carried out by a single airplane.

* The airline has one or more airplanes.

* A passenger can book a seat on a flight.


Try to design the ER diagram on your own. Give it some time and if you have trouble remembering some of the concepts, feel free to take a look at the previous lessons. 

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In the next lesson, we will discuss the solution to this problem.

In this exercise, you will design the ER model for flight database.

Introduction

Fundamental Concepts

Data Modeling

Entity-Relationship Data Model

The Relational Data Model

Functional Dependencies

Normalization

Structured Query Language

Conclusion

Exercise 2

The flight database