How to show sql result on server console
ActiveRecord::Base.connection.execute("select count(*) from cars;")

rslt = ActiveRecord::Base.connection.execute("select count(*) from cars;")
p rslt

rslt = ActiveRecord::Base.connection.execute("select count(*) from cars;")
rslt.each {|mysql_result| puts mysql_result}

class HomeController < ActionController::Base
  def index
    rslt = ActiveRecord::Base.connection.execute("select count(*) from cars;")
    logger.info "#{rslt}"
  end
end