ALTER TABLE ENROLMENT_PERIOD CHANGE COLUMN START_DATE_YEAR_MONTH_DAY START_DATE_DATE_TIME timestamp NOT NULL default '0000-00-00 00:00:00';
ALTER TABLE ENROLMENT_PERIOD CHANGE COLUMN END_DATE_YEAR_MONTH_DAY END_DATE_DATE_TIME timestamp NOT NULL default '0000-00-00 00:00:00';