ALTER TABLE `#__circolari`
  ADD COLUMN `created`      DATETIME NULL DEFAULT NULL AFTER `checked_out_time`,
  ADD COLUMN `modified`     DATETIME NULL DEFAULT NULL AFTER `created_by`,
  ADD COLUMN `publish_up`   DATETIME NULL DEFAULT NULL AFTER `modified_by`,
  ADD COLUMN `publish_down` DATETIME NULL DEFAULT NULL AFTER `publish_up`;
