oracle计算年龄

入院年龄按入院时间和出生日期进行计算
select * from pat_visit_v v
 where  floor(MONTHS_BETWEEN(v.visit_time,v.BIRTH_TIME)/12) <=26;



原文地址:https://www.cnblogs.com/zuifengke/p/694b31e856501a33a0282402cd5071ea.html