The Amazon Simple DB data provider models the data in Amazon SimpleDB as a relational database. An Amazon SimpleDB data storage is divided into domains and each domain can have rows with attributes. This is similar to but not the same as a relational database.
The data provider models the Amazon SimpleDB domains as an ADO.NET data source, but it is best to be aware of the trade-offs between using a highly available, flexible, and scalable non-relational data store vs. a traditional relational database.
Please visit Amazon SimpleDB Documentation to learn more about Amazon SimpleDB.