Tell us how migration processes were carried out in your projects.

In my migration projects, database migrations were usually carried out using tools like Flyway or Liquibase. The process involved writing migration scripts that described schema changes — creating tables, adding columns, modifying indexes, etc. These scripts were stored in version control systems and applied automatically during deployment.

An approximate process:

1. A new migration script is created with a unique version number.
2. The script is tested locally on a copy of the database.
3. During deployment, scripts are applied in version order to bring the database to the desired state.
4. If necessary, a rollback script is written.

This approach ensures schema consistency across different environments and minimizes errors during updates.