Time difference calculations for call center - part 1

Here are two scripts that return the time difference between two dates in Oracle:

1.The following script returns the time portion in seperated columns :

SECOUNDS   MINUTES    HOURS    DAYS

     38              8            10           2569 

SELECT TO_CHAR(DATES.TIME_KEY, 'DD/MM/YYYY:HH24:MI:SS') AS TIME_KEY,

TO_CHAR(SYSDATE, 'DD/MM/YYYY:HH24:MI:SS') AS TODAY,

trunc(86400 * (SYSDATE - DATES.TIME_KEY)) -60 * (trunc((86400 * (SYSDATE - DATES.TIME_KEY) / 60))) AS SECOUNDS,trunc((86400 * (SYSDATE - DATES.TIME_KEY)) / 60) -60 *(trunc(((86400 * (SYSDATE - DATES.TIME_KEY)) / 60) / 60)) AS MINUTES,trunc(((86400 * (SYSDATE - DATES.TIME_KEY)) / 60) / 60) -24 *(trunc((((86400 * (SYSDATE - DATES.TIME_KEY)) / 60) / 60) / 24)) AS HOURS,trunc((((86400 * (SYSDATE - DATES.TIME_KEY)) / 60) / 60) / 24) AS DAYS

FROM DATES.TIME_KEY
 

2.The following script returns the time portion in hours,minutes and secounds in one column :

HOURS MINUTES SECOUNDS       

61 :    22 :    11

 

SELECT

TO_CHAR(DATES.TIME_KEY.TIME_KEY, 'DD/MM/YYYY:HH24:MI:SS') AS TIME_KEY,

TO_CHAR(SYSDATE, 'DD/MM/YYYY:HH24:MI:SS') AS TODAY,

(sysdate - nvl(DATES.TIME_KEY.TIME_KEY, sysdate)) * 24 as hour_diff,

floor((SYSDATE - DATES.TIME_KEY.TIME_KEY) * 24) ' : '
mod(floor((SYSDATE - DATES.TIME_KEY.TIME_KEY) * 24 * 60), 60)' : '

mod(floor((SYSDATE - DATES.TIME_KEY.TIME_KEY) * 24 * 60 * 60), 60)' ' time_difference

FROM DATES.TIME_KEY

These scripts can become universe objects and are good for call center calculation