it's true you almost always will find yourself needing to join cross collection/table... I believe the recent support to integrate with hadoop should help this:

it's true you almost always will find yourself needing to join cross collection/table... I believe the recent support to integrate with hadoop should help this: http://www.mongodb.org/display/DOCS/Hadoop+Quick+Start http://www.mongodb.org/display/DOCS/Hadoop+Quick+Start when your reason for needing joins is for reporting (often the case for say financial reporting) Also, the postgres integration (linked/discussed) here on HN