Operations in the New Aggregation Framework
Available in 2.1 development release. Will be stable for production in the 2.2 release Built by Chris Westin (@cwestin63) MongoDB has built-in MapReduce functionality that can be used for complex analytics tasks. However, we’ve found that most of the time, users need the kind of group-by functionality that SQL implementations have. This can be implemented using map/reduce, but doing so is more...