Abstract: Electronic equipment includes a display portion that includes a screen in which a menu is displayed, a controller that is rotatable or pivotable around an axis and movable in a plurality of different positions in a axis direction, an indicator that displays a position in the axis direction of the controller on the screen, and a processor that carries out a processing according to a function that is selected according to a rotation or a pivot of the controller from selectable functions which changes according to a position in the axis direction of the controller.

Abstract: The present invention discloses a join operation processing system in a relational model where a data base processing mechanism provides at least maximum/minimum calculation execution means, reduction sort execution means and the join operation execution means.During the join operation for generating a new table linking tuples of a plurality of pertinent tables based on a common field or plurality of common fields, a minimum extraction range for determining the tuples to be processed is determined with respect to the join field or the plurality of join fields for each table which is considered as the object of the join. The operation rate is thereby improved by omitting the processing referring to unwanted data.