I did the MongoDB class they offer but was always scared to use in production (after reading so many bad experiences). And it's really too bad. I find JSON is just so much more pleasant to deal with than SQL.
Sure. But I'm just stating which I'd rather deal with. Not claiming equivalency....
Does MongoDB allow SQL queries? I didn't know that, but then again, I guess I don't care either. I haven't looked at Mongo in a couple of years after deciding not to use it. I do recall liking the query syntax from the class though.
I haven't messed with JSON features in PostgreSQL yet and have no idea how they work. That's next.