Database Refactoring Best Practices

1. Introduction

Database refactoring is the process of restructuring existing database schemas without changing their external behavior. It's a critical aspect of maintaining and evolving database systems as requirements change over time.

2. Key Concepts

3. Best Practices

1. Identify the Need for Refactoring: Regularly assess your database to determine if changes are required due to performance issues or changing requirements.
2. Use Version Control: Maintain a version history of your database schema to track changes and revert if necessary.
3. Plan Changes Carefully: Create a detailed plan for schema changes, including the rationale and impact analysis.
4. Test Changes: Implement changes in a staging environment first. Use automated tests to ensure functionality remains intact.
5. Document Changes: Keep detailed records of schema changes and the reasons behind them for future reference.

ALTER TABLE users 
                ADD COLUMN full_name VARCHAR(255);

                UPDATE users 
                SET full_name = CONCAT(first_name, ' ', last_name);

                ALTER TABLE users 
                DROP COLUMN first_name, 
                DROP COLUMN last_name;

4. FAQ