Could you explain what is meant by the process of data migration or database structure transfer?

The process of transferring data or the structure of a database (often called database migration) involves transferring data and/or schema (table structures, indexes, relationships) from one database to another or updating an existing database. This may include:

• Exporting data from the source database.
• Transforming data to meet the requirements of the new structure.
• Importing data into the target database.
• Updating the database schema (e.g., adding new tables, changing data types).

For example, when updating an application, it may be necessary to change the table structures, and migration ensures the correct transfer and preservation of data without loss.