Database migration is the process of moving data from one database system, version or schema to another. It is required when a project upgrades its storage technology, restructures tables or consolidates multiple sources, and it ensures that the application can continue to read and write data without interruption.
Also called: DB migration
Why it matters
A reliable migration avoids downtime and data loss, protecting the client’s operations and reputation while keeping revenue streams intact.
How it works
Migration is performed by exporting the existing data, transforming it to match the target schema, and then importing it, often using tools such as Laravel’s migration files run via the artisan command, WordPress export/import plugins, or custom scripts that execute SQL statements and handle foreign‑key constraints.
The mistake people make
The common error is running schema changes without first backing up data or testing the transformation, which can corrupt records or break the site when the new structure does not match the old data format; the result is lost information or a site that crashes on page load.
