I am just throwing a number out there but I would hazard to guess at least 90% of applications would do just fine with RDBMS with an ORM and standard settings.

I am just throwing a number out there but I would hazard to guess at least 90% of applications would do just fine with RDBMS with an ORM and standard settings. You don't need to write your own SQL so you can get just what you want. Let your backend application worry about the SQL.