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select (sysdate-t.operate_time)*24*60*60 from ps_log_operate t select to_date('2012-2-29 10:31:30','YYYY-MM-DD HH24:MI:SS')-to_date('2012-2-27 10:31:30','YYYY-MM-DD HH24:MI:SS') from dual t -- 结果 2select (to_date('2012-2-29 10:31:30','YYYY-MM-DD HH24:MI:SS')-to_date('2012-2-27 10:31:30','YYYY-MM-DD HH24:MI:SS') )*24from dual t -- 结果 48select sysdate d1,sysdate+2 d2,sysdate+3 d3,sysdate+4 d4from dual t -- 结果 D1 D2 D3 D4-- 2012-2-29 23:46:14 2012-3-2 23:46:14 2012-3-3 23:46:14 2012-3-4 23:46:14 |
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