In Oracle, is there a function that calculates the difference between two Dates?

Question

In Oracle, is there a function that calculates the difference between two Dates? If not, is a way to display the difference between two dates in hours and minutes?

Answer 1

You can use these functions :

1) EXTRACT(element FROM temporal_value)

2) NUMTOYMINTERVAL (n, unit)

3) NUMTODSINTERVAL (n, unit).

For example :

SELECT EXTRACT(DAY FROM NUMTODSINTERVAL(end_time - start_time, 'DAY'))
   || ' days ' || 
   EXTRACT(HOUR FROM NUMTODSINTERVAL(end_time - start_time, 'DAY'))
   ||':'|| 
   EXTRACT(MINUTE FROM NUMTODSINTERVAL(end_time - start_time, 'DAY')) 
   ||':'||
   EXTRACT(SECOND FROM NUMTODSINTERVAL(end_time - start_time, 'DAY')) 
   "Lead Time"
FROM table;