Oracle计算年龄

--算法一：
SELECT TRUNC(months_between(sysdate, csrq)/12) AS "Age" FROM wrxxb;

--算法二：
SELECT trunc(to_number(to_char(sysdate,'yyyymmdd'))/10000 - to_number(to_char(to_date('1982-8-28','yyyy-mm-dd'),'yyyymmdd'))/10000) FROM dual;

--算法三：

SELECT to_char(sysdate,'yyyy')-to_char(csrq,'yyyy')+ decode(sign(to_char(sysdate,'mmdd')-to_char(csrq,'mmdd')),-1,-1,0,0,1,0) FROM wrxxb