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http://dba-oracle.com/t_add_hours_to_oracle_date.htm#:~:text=Answer%3A%20To%20add%20hours%20to%20an%20Oracle%20date,sysdate%20%2B%20interval%20%27300%27%20%225%20hours%22%20from%20dual%3B
http://dba-oracle.com/t_add_hours_to_oracle_date.htm
Answer: To add hours to an Oracle date you can this simple query: 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;
https://stackoverflow.com/questions/52658426/oracle-sql-adding-hours-to-a-date
Starting with the date/time of July 20, 2001 10:40:12, display the following result table. Use the Dual table. subtract 2 days. Result :18-jul-01 10:40:12. add half a day. Result: 20-jul-01 22:40:12. add 4and half hours. Result: 20-jul-01 15:10:12. sql oracle.
https://community.oracle.com/tech/developers/discussion/4486000/adding-hours-to-a-date
https://community.oracle.com/tech/developers/discussion/4486000/adding-hours-to-a-date You say that the two times are a start and an additional time. The first answer given to you assumes that the first time is the "hours" and the second time is the "minutes".
https://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:1447204403384
dates only support seconds, just add 6/24 + 22/24/60 + 23/24/60/60 (eg: math, if you add 1 to a date you get the next day at the same time, 1/24 - add an hour and so on) timestamp, not much different however, consider "an interval" in the future.
https://docs.oracle.com/cd/E17952_01/mysql-5.6-en/date-and-time-functions.html
ADDDATE(date,INTERVAL expr unit), ADDDATE(expr,days) When invoked with the INTERVAL form …
https://docs.oracle.com/cd/E41183_01/DR/Dateadd.html
This function tells the system to add days, months, and years—in that order. For instance, if you tell the system to add one day and one year to the date 02/28/2007, the result is 03/01/2008—not 02/29/2008. To get 02/29/2008 as the result, you would use two calculations, first adding the year, then adding the day.
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