Execution example::

  select Entries --sortby _id --offset -2 --output_columns _key
  # [
  #   [
  #     0, 
  #     1337566253.89858, 
  #     0.000355720520019531
  #   ], 
  #   [
  #     [
  #       [
  #         5
  #       ], 
  #       [
  #         [
  #           "_key", 
  #           "ShortText"
  #         ]
  #       ], 
  #       [
  #         "Good-bye Senna"
  #       ], 
  #       [
  #         "Good-bye Tritonn"
  #       ]
  #     ]
  #   ]
  # ]