salida.rb

#Agosto - 2012
irb(main):012:0> AppointmentRequest.where("created_at > '2012-08-01' and created_at < '2012-08-31'").count
   (19.3ms)  SELECT COUNT(*) FROM `appointment_requests` WHERE (created_at > '2012-08-01' and created_at < '2012-08-31')
=> 543

#Septiembre - 2012
irb(main):011:0> AppointmentRequest.where("created_at > '2012-09-01' and created_at < '2012-09-31'").count
   (19.0ms)  SELECT COUNT(*) FROM `appointment_requests` WHERE (created_at > '2012-09-01' and created_at < '2012-09-31')
=> 471

#Octubre - 2012
irb(main):010:0> AppointmentRequest.where("created_at > '2012-10-01' and created_at < '2012-10-31'").count
   (19.7ms)  SELECT COUNT(*) FROM `appointment_requests` WHERE (created_at > '2012-10-01' and created_at < '2012-10-31')
=> 443

#Noviembre - 2012
irb(19.1ms)  SELECT COUNT(*) FROM `appointment_requests` WHERE (created_at > '2012-11-01' and created_at < '2012-11-31')
=> 510

#Diciembre - 2012
irb(main):017:0> AppointmentRequest.where("created_at > '2012-12-01' and created_at < '2012-12-31'").count
   (19.3ms)  SELECT COUNT(*) FROM `appointment_requests` WHERE (created_at > '2012-12-01' and created_at < '2012-12-31')
=> 488

#Enero - 2013
irb(main):014:0> AppointmentRequest.where("created_at > '2013-01-01' and created_at < '2013-01-31'").count
   (19.0ms)  SELECT COUNT(*) FROM `appointment_requests` WHERE (created_at > '2013-01-01' and created_at < '2013-01-31')
=> 564

#Febrero - 2013
irb(main):015:0> AppointmentRequest.where("created_at > '2013-02-01' and created_at < '2013-02-31'").count
   (18.9ms)  SELECT COUNT(*) FROM `appointment_requests` WHERE (created_at > '2013-02-01' and created_at < '2013-02-31')
=> 676