ORACLE 毫秒转换为日期日期转换毫秒

转自

http://joewalker.iteye.com/blog/940307

--日期转换毫秒

SELECT TO_NUMBER(TO_DATE(\'2005-03-29 12:30:45\', \'YYYY-MM-DD HH24:MI:SS\') -
       TO_DATE(\'1970-01-01 8:0:0\', \'YYYY-MM-DD HH24:MI:SS\')) * 24 * 60 * 60 * 1000
FROM DUAL;

--毫秒转换日期

SELECT TO_CHAR(1112070645000 / (1000 * 60 * 60 * 24) +
       TO_DATE(\'1970-01-01 08:00:00\', \'YYYY-MM-DD HH:MI:SS\'), \'YYYY-MM-DD HH:MI:SS\') AS CDATE
FROM DUAL;