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  • How To Add Day, Hour, Minute, Second to a Date Value in Oracle

      1. Add a day.
        select to_date('02-22-2008 10:30:30','mm-dd-yyyy hh24:mi:ss') today, 
        to_date('02-22-2008 10:30:30','mm-dd-yyyy hh24:mi:ss')+1 next_day 
        from dual;
        TODAY NEXT_DAY
        ------------------------- -------------------------
        02-22-08 10:30:30 02-23-08 10:30:30
      2. Add an hour.
        select to_date('02-22-08 10:30:30','mm-dd-yy hh24:mi:ss') today,
        to_date('02-22-08 10:30:30','mm-dd-yy hh24:mi:ss')+ 1/24 next_hour
        from dual;
        TODAY NEXT_HOUR
        ------------------------ ------------------------
        02-22-08 10:30:30 02-22-08 11:30:30
      3. Add a minute.
        select to_date('02-22-08 10:30:30','mm-dd-yy hh24:mi:ss') today,
        to_date('02-22-08 10:30:30','mm-dd-yy hh24:mi:ss')+ 1/(24*60) next_min
        from dual;
        TODAY NEXT_MIN
        ------------------------ ------------------------
        02-22-08 10:30:30 02-22-08 10:31:30
      4. Add a second.
        select to_date('02-22-08 10:30:30','mm-dd-yy hh24:mi:ss') today,
        to_date('02-22-08 10:30:30','mm-dd-yy hh24:mi:ss')+ 1/(24*60*60) next_sec
        from dual;
        TODAY NEXT_SEC
        ------------------------ ------------------------
        02-22-08 10:30:30 02-22-08 10:30:31
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  • 原文地址:https://www.cnblogs.com/QDuck/p/2482372.html
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