生活了多少天

一万天  

 SELECT ROUND(TO_NUMBER(TO_DATE('2010-06-21', 'yyyy-MM-dd') -
                        TO_DATE('1983-02-03', 'yyyy-MM-dd')))
   FROM DUAL
 SELECT ROUND(TO_NUMBER(SYSDATE -
                                TO_DATE('1983-02-03', 'yyyy-MM-dd')))
 FROM DUAL