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https://stackoverflow.com/questions/11181344/find-oracle-records-from-the-past-12-hours
AND date '1970-01-01' + nutodsinterval( ttr_start, 'SECOND' ) >= sysdate - interval '12' hour should work. If there is an index on ttr_date it would probably be more efficient to go the other way and convert the date of 12 hours ago to a number. AND ttr_start >= ((sysdate - interval '12' hour) - date '1970-01-01')*24*60*60
http://www.nazmulhuda.info/use-of-sysdate-in-oracle
where T.CREATED >= sysdate-INTERVAL '1' HOUR order by created;-- Select last 12 hour data from table or select last 1/2 day data from table select * from TRANSACTION t where T.CREATED >= sysdate-12 / 24 order by created; or select * from TRANSACTION t where T.CREATED >= sysdate-1 / 2 order by created; or select * from TRANSACTION t where T.CREATED >= sysdate …
https://www.oracletutorial.com/oracle-date-functions/oracle-sysdate/
The following example returns the current date and time of the OS where the Oracle Database resides: SELECT TO_CHAR ( SYSDATE, 'MM-DD-YYYY HH24:MI:SS') FROM dual; Code language: SQL (Structured Query Language) (sql) In this example, we used the TO_CHAR () function to format the current system date and time value returned by the SYSDATE function.
https://www.oracle-dba-online.com/sql/date_operators_functions.htm
Hours in 12 hour format . HH12. Hours in 12 hour format. HH24. Hours in 24 hour format. MI. Minutes. SS. Seconds. FF. Fractional Seconds. SSSSS. Milliseconds. J. Julian Day i.e Days since 1st-Jan-4712BC to till-date. RR. If the year is less than 50 Assumes the year as 21ST Century. If the year is greater than 50 then assumes the year in 20th ...
https://www.geeksforgeeks.org/how-sysdate-function-works-in-pl-sql/
Last Updated : 30 Jan, 2019. The PLSQL SYSDATE function will returns current system date and time on your database. There is no any parameter or argument for the SYSDATE function. The SYSDATE function returns a date value. Note that the SYSDATE function return date and time as “YYYY-MM-DD HH:MM:SS” (string) or as YYYYMMDDHHMMSS (numeric).
https://community.oracle.com/tech/developers/discussion/26777/how-to-subtract-time-from-sysdate
SYSDATE includes time, TRUNC (SYSDATE) does not include time. If you subtract these two, you'll get a positive number of 1.00 or less which is the fraction of a day. For instance high noon would have a fraction of 0.50000. 12:01 p.m. would be …
https://p2p.wrox.com/oracle/8930-how-subtract-hours-sysdate-oracle.html
Hi mcmouli, You need to compare the date with (sysdate - 50/24) i.e. you need to convert 50 hours into days first. The following execution sequence shows how you can use "decode(sign())" function to compare the dates in the dummy table t.
http://dba-oracle.com/t_add_hours_to_oracle_date.htm
select sysdate, sysdate + (1/24*5) "5 hours" from dual; The formula (1/24*5) is explained as follows: sysdate + 1 is one day ahead (exactly 24 hours) - divided by 24 gives one hour. * 5 multiply by 5 to get the 5 hours. You can also add 5 hours to a date this way: (60 * 5) select sysdate, sysdate + interval '300' "5 hours" from dual; As we see, there are several ways to …
http://www.dba-oracle.com/t_date_math_manipulation.htm
Oracle date math manipulation. Oracle Database Tips by Donald Burleson. You can use intrinsic Oracle functions to determine any date in the future: Date / Time Math. Time Description. WHERE (date) > sysdate - 7/24; Past 7 hours. WHERE (date) > sysdate - 7; Past 7 days.
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