delimiter $$
create trigger update_check BEFORE UPDATE on tb_list FOR EACH ROW
BEGIN
IF NEW.tname <> OLD.tname THEN
SET NEW.tname = OLD.tname;
END IF;
END$$
delimiter ;
blog.visualp.com
delimiter $$
create trigger update_check BEFORE UPDATE on tb_list FOR EACH ROW
BEGIN
IF NEW.tname <> OLD.tname THEN
SET NEW.tname = OLD.tname;
END IF;
END$$
delimiter ;