view.result:

v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select (year(now()) - year(`t1`.`DOB`)) AS `Age` from `t1` having (`Age` < 75)

SELECT (year(now())-year(DOB)) AS Age FROM t1 HAVING Age < 75;

Age

42

38

43

39

SELECT * FROM v1;

Age

42

38

43

39

DROP VIEW v1;

DROP TABLE t1;

CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, a char(6) DEFAULT 'xxx');