Also, keep in mind that most big websites aren't just a single box you can query. A plan for fetching data across >>1000s of boxes works a bit differently than within MySQL or whatever.
Usually you end up making layers of abstraction / cacheing / parallelization atop them that don't have an easy SQL interface for the frontend to query. FQL was heavily sanitized and abstracted anyway, not directly SQL onto the boxes--imagine that security shitshow!
Usually you end up making layers of abstraction / cacheing / parallelization atop them that don't have an easy SQL interface for the frontend to query. FQL was heavily sanitized and abstracted anyway, not directly SQL onto the boxes--imagine that security shitshow!