While dramatically faster for inserts and retrieval NoSql can be very frustrating executing more complex queries, easily performed by their relational cousins. Now the developers of CouchDB and SQLite comes a new query language specification, UnQL (pronounced “Uncle”), which provides an SQL like query language for working with NoSql Databases.

Unql aims to build upon existing SQL like syntax, supplementing it with concepts appropriate for the unstructured, self-describing data formats

The language includes typical SQL actions like SELECT, INSERT, UPDATE and DELETE commands, where they work on collections of unordered sets of documents (and not tables of SQL world). In UnQL, a document is an object that can be described in JSON.

The specification, it is promised, will be placed in the public domain when complete.

http://wwww.unqlspec.org/display/UnQL/Home