Adding Unique Constraint to City Names

# Introduction

In this project, you will learn how to add a unique constraint to the city names in the `country` table of a MySQL database. This is a common task in database management, where you need to ensure that each city name is unique within the database to maintain data integrity.

## 🎯 Tasks

In this project, you will learn:

- How to start the MySQL server and log into the MySQL terminal
- How to import a SQL script to create a database
- How to add a unique constraint to a field in a MySQL table

## 🏆 Achievements

After completing this project, you will be able to:

- Understand the importance of unique constraints in database management
- Confidently add unique constraints to fields in MySQL tables
- Apply your knowledge to maintain data integrity in your own database projects