Amazon Web Services has launched a hosted database service called DynamoDB, stepping into competition with platform-as-a-service providers such as Salesforce.com, Oracle and others.

AWS announced new database capabilities for Amazon Aurora and Amazon DynamoDB, and introduced Amazon Neptune, a new graph database service.

With DynamoDB, Amazon offers and on-demand web-scale distrubted database to the tens of thousands of customers who already use other cloud computing services from Amazon.