My question stems from the concept that NoSQL is not a categoric replacement for the RDBMS. In some cases a MongoDB, CouchDB, Cassandra, etc. could serve as an

My question stems from the concept that NoSQL is not a categoric replacement for the RDBMS. In some cases a MongoDB, CouchDB, Cassandra, etc. could serve as an application's only data store. In most of the scenarios I deal with, the ad-hoc capabilities presented by an SQL interface to common reporting or analytic tools are very important.