A Platform-as-a-Service database environment delivered on the same force.com platform used by salesforce, but without the higher-level business services.
Database.com is the cloud database that integrates Salesforce.com's Social Enterprise Platform. Among other things, the platform allows:
Database services
- Relational data store
- Support for many data types
- Query language
- Enterprise search services
File storage
- Documents, Video, Images
- Integration of file storage into relational data structures
Business logic
- Declarative triggers
- Programmatic, transactional triggers and stored procedures
Identity and Access management
Data APIs
Metadata APIs
etc.