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Oracle
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Oracle
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Date
Timestamp
Timestamp With Time Zone
Timestamp With Local Time Zone
Interval Year To Month
Interval Day To Second
DateÀàÐÍÓÃÓÚ´æ´¢ÈÕÆÚ£¬¾«È·µ½Ã룬¿ÉÄÜͨ¹ýÉèÖÃNLS_DATE_FORMAT»òÕßTO_CHAR·½·¨À´¸ñʽ»¯ÈÕÆÚµÄÊä³ö¡£
TimestampÓÃÓÚ´æÔÚÈÕÆÚÓëʱ¼äÐÅÏ¢£¬Õâ¸öÀàÐͱÈDate¸ü¾«È·£¬×îСÄܾ«È·µ½Ð¡Êýµãºó9λ¡£ÏÂÃæÊÇÒ»¸öÀý×Ó£º
scott@ORCL> select nowDate,nowTimestamp from testtime;
NOWDATE   NOWTIMESTAMP
--------- -------------------------------
24-NOV-08 24-NOV-08 10.36.59.000000000 PM
Timestamp With Time ZoneÀàÐÍÓëTimestamp·Ç³£ÏàËÆ£¬Ö»ÊÇÊǰ´ÕÕÖ¸¶¨Ê±Çø½øÐÐÏÔʾ¡£
Timestamp With Local Time Zone  ÀàÐÍÒÔÉÏÃæµÄ¸ü¼ÓÏàËÆ£¬ÕâÀïÊǰ´ÕÕµ±Ç°Ê±ÇøÏÔʾʱ¼ä¡£
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scott@ORCL>select * from testtime;
NOWDATE   NOWTIMESTAMP                  TIMEWITHZONE            TIMEWITHLOCALZONE
--------- ----------------------------------- -----------------------------------
24-NOV-08 24-NOV-08 10.44.55.000000000 PM     24-NOV-08 10.44.55.000000 PM +08:00 24-NOV-08 10.44.55.000000 PM
¿ÉÒÔʹÓÃALTER SESSION SETÀ´ÉèÖÃTimestampµÄÊä³ö£¬È磺
scott@ORCL> ALTER SESSION SET NLS_DATE_FORMAT =
                          'YYYY-MM-DD HH24:MI:SS';
Session altered.
scott@ORCL> ALTER SESSION SET NLS_TIMESTAMP_FORMAT
                      = 'YYYY-MM-DD HH24:MI:SS.FF';
Session altered.
scott@ORCL> ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT
                     = 'YYYY-MM-DD HH24:MI:SS.FFTZH:TZM';
Session altered.


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as
  begin
    insert into dept values(deptno,dname,loc);
end;
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