ALTER TABLE `student` ADD `previous_school_std` TEXT NULL DEFAULT NULL , 
ADD `school_entrydate_std` DATE NULL DEFAULT NULL; 

-- SERIAL USR EN PAYMENT__DETAIL/NON ACADEMIC
ALTER TABLE `payment_detail` ADD `serial_usr` INT( 11 ) NULL DEFAULT NULL ;
ALTER TABLE `payment_detail_non_academic` ADD `serial_usr` INT( 11 ) NULL DEFAULT NULL ;

-- BUS_YEAR_USER
ALTER TABLE `bus_year_user` ADD  `type_address_byu` ENUM( 'HOME', 'OTHER' ) NOT NULL AFTER serial_sft;
ALTER TABLE `bus_year_user` ADD  `address_byu` text NULL DEFAULT NULL AFTER type_address_byu;


-- VISITS_MEDICAL_FILE
ALTER TABLE `visits_medical_center` CHANGE `date_vmc` `date_vmc` TIMESTAMP NOT NULL ;