docs: def _unary_arithmetic(self, unary):
          """
          Parameters
          ----------
          unary: char
              Unary arithmetic operator (-, +) to be applied to this column
  
          Returns
          -------
          self
  
          Notes
          -----
          Returning self will allow the next object to use this column ops and
          concatenate something else
          """
          copy = self.copy()
          copy.query.removeSELECT("{}".format(copy.execution_name))
          copy.execution_name = "{}({})".format(unary, self.execution_name)
          copy.query.addSELECT(copy.execution_name)
  
          return copy