- Database access
- ConnectionProvider
 - Using DataSources
 - Using c3p0
 - Using Proxool
 - Using existing Proxool pools
 - Configuring Proxool via XML
 - Configuring Proxool via Properties
 - Using Hikari
 - Using Hibernate's built-in (and unsupported) pooling
 - User-provided Connections
 - ConnectionProvider support for transaction isolation setting
 - Database Dialect