Offer tooling for common database operations, such as running Sequel migrations, store and load from the database schema, rollback, redo some migration, rerun all migrations, display applied and missing migrations. It allows integration with Rake, while being lazily evaluated to not slow down other Rake tasks. It's also configurable in order to support more actions and database vendors. Some tasks are currently implemented for PostgreSQL only for the time being out of the box. It should be possible to complement this gem with another one to support other database vendors, while taking advantage of the build blocks provided by this tool set.