Created at Update at timestamp trigger in mysql

For created_at timestamp

CREATE TRIGGER `Update create at Timestamp If New Insert`
AFTER INSERT ON `table_name`
 FOR EACH ROW
UPDATE `table_name` SET `created_on` = UNIX_TIMESTAMP()
WHERE id = NEW.id


For Update timestamp

CREATE TRIGGER `Update update at timestamp on update`
AFTER UPDATE ON `table_name`
 FOR EACH ROW

UPDATE `table_name` SET `updated_at` = UNIX_TIMESTAMP() WHERE id = NEW.id