Facebook supports a variant of SQL called FQL, or Facebook Query Language. If you know anything about Facebook's data storage center, Facebook has moved away from the traditional relational database and created their own custom application for storing data, which has the ability to query petaflops worth of data in seconds. So what is FQL? FQL looks very like SQL. It has a select and select list, a from, a where clause, which makes it seem like its ordinary SQL. However, it cannot use inner joins