ALTER TABLE seven_signs_status
  ADD COLUMN dateupdate DATETIME NULL
, ADD COLUMN calendar   DATETIME NOT NULL DEFAULT '2999-12-31 23:59:59';

UPDATE seven_signs_status           ,seven_signs_calendar
   SET seven_signs_status.dateupdate=seven_signs_calendar.dateupdate
     , seven_signs_status.calendar  =seven_signs_calendar.calendar
 WHERE seven_signs_status.id        =seven_signs_calendar.rowid;

ALTER TABLE        seven_signs_calendar
  RENAME TO _trash_seven_signs_calendar;
