I"m sure MongoDB doesn"t officially support "joins". What does this mean?
Does this mean "We cannot connect two collections(tables) together."?
I think if we put the value for _id in collection A to the other_id in collection B, can we simply connect two collections?
If my understanding is correct, MongoDB can connect two tables together, say, when we run a query. This is done by "Reference" written in http://www.mongodb.org/display/DOCS/Schema+Design.
Then what does "joins" really mean?
I"d love to know the answer because this is essential to learn MongoDB schema design. http://www.mongodb.org/display/DOCS/Schema+Design