日期和时间转换为小时和分钟

Question

In SQL developer, I substracted two timestamp columns which gave me the difference.

Select (created_dt_1 - created_dt_2) as delivery_time
from order;

DELIVERY_TIME
+02 05:12:30.651000

The output is saying it took 2 days and 5 hours and 12 minutes and 30 seconds. However, I want it to be in hours and minutes only. I was thinking about using extract to take the days and multiply by 24 hours from created_dt_1 and created_dt_2 then using extract again for hours and minutes and finally adding them all up.

However, I would like to know if there is a function or more efficient way of converting the 'delivery_time' into hours and minutes.

Answer 1

I was thinking about using extract to take the days and multiply by 24 hours from created_dt_1 and created_dt_2 then using extract again for hours and minutes and finally adding them all up.

If you only want the time in minutes then:

SELECT TRUNC((CAST(created_dt_1 AS DATE) - CAST(created_dt_2 AS DATE)) * 24 * 60)
         AS delivery_time_minutes
FROM   orders;

If you want it as hours and minutes then:

SELECT (EXTRACT(DAY FROM delivery_time) * 24
         + EXTRACT(HOUR FROM delivery_time)) || ' hours '
         || EXTRACT(MINUTE FROM delivery_time) || ' minutes'
         AS delivery_time
FROM   (
  SELECT (created_dt_1 - created_dt_2) AS delivery_time
  FROM   orders
);

db<>fiddle here