What is the difference between schema evolution and schema migration?

What is the difference between schema evolution and schema migration?

Schema evolution refers to the ability of a database to adapt to changes in the data model without requiring a complete overhaul. Schema migration, on the other hand, involves the process of moving data from one schema to another, often requiring data transformation.

Can you give me an example of schema evolution?

Sure! An example of schema evolution is when you add a new column to a table in a database without affecting existing data or applications that rely on that table.

What about schema migration? How does that work?

Schema migration typically involves creating a new schema, transferring data from the old schema to the new one, and ensuring that all applications are updated to use the new schema.

Are there any tools that can help with schema migration?

Yes, there are several tools available for schema migration, such as Liquibase, Flyway, and Alembic, which help automate the process and manage version control.