PostgreSQL is expanding to become the NoSQL choice of SQL databases. Version 9.2 includes the ability to store JSON data with full querying capabilities on the content of the JSON document. Other extensions let the user store and query data in the form of key/value pairs. This lets you take advantage of the underlying storage and transactional capabilities of a time-tested database without being tied to a relational data model. This is ideal for those who want both SQL and NoSQL applications but prefer a single reliable infrastructure that they already know how to support.