ORACLE毫秒与日期的相互转换

SELECT TO_CHAR(1406538765000 / (1000 * 60 * 60 * 24) + TO_DATE('1970-01-01 08:00:00', 'YYYY-MM-DD HH:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') AS CDATE FROM DUAL; 日期转换毫秒 1 2 3 SELECT TO_NUMBER(TO_DATE('2014-07-28 17:12:45', 'YYYY-MM-DD HH2

SELECT TO_CHAR(1406538765000 / (1000 * 60 * 60 * 24) +     

        TO_DATE('1970-01-01 08:00:00', 'YYYY-MM-DD HH:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') AS CDATE     

 FROM DUAL;

日期转换毫秒

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2

3

SELECT TO_NUMBER(TO_DATE('2014-07-28 17:12:45', '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;

获取系统当前时间

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select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;