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

• Entity Syntax
• Database Configuration

• School of Haskell documentation
• uuid example

• Triggers for SQL
• ODBC
• Zookeeper

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