Get started with Persistent at: http://www.yesodweb.com/book/persistent

• Entity Syntax is documented in the Database.Persist.Quasi module
• Database Configuration

• School of Haskell documentation
• uuid example

• Triggers for SQL
• ODBC
• Zookeeper
• persistent-typed-db allows type safe access to multiple databases with different schemas
• esqueleto allows for more complex SQL queries using the Persistent backend types

Some code snippets:

Basic MongoDB connection and queries

Non scaffolded MongoDB app

Scaffolded without Foundation

Using the raw MongoDB driver

Head to the API docs for more detail