Flyway supports three types of migrations:

1. Versioned Migrations: Applied exactly once, have version numbers
   • Example: V1__Create_user_table.sql
2. Repeatable Migrations: Applied whenever their checksum changes
   • Example: R__Update_user_view.sql
3. Undo Migrations: Used to reverse versioned migrations
   • Example: U1__Undo_Create_user_table.sql