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

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