Query List Comprehesion compared to Active Record

query.erl

mnesia:transaction(
  	fun() ->
		qlc:e(
					qlc:q( [ { U#name, U#reputation } || 
							U <- mnesia:table(users),
							U#user.age < 21])
				)
		end
	)

query.rb

Users.select("name, reputation"), where("age < 21")

query.sql

SELECT name, reputation WHERE age < 21 FROM Users