CREATE OR REPLACE FUNCTION time_diff (
DATE_1 IN DATE, DATE_2 IN DATE) RETURN NUMBER IS
NDATE_1 NUMBER;
NDATE_2 NUMBER;
NSECOND_1 NUMBER(5,0);
NSECOND_2 NUMBER(5,0);
BEGIN
-- Get Julian date number from first date (DATE_1)
NDATE_1 := TO_NUMBER(TO_CHAR(DATE_1, 'J'));
-- Get Julian date number from second date (DATE_2)
NDATE_2 := TO_NUMBER(TO_CHAR(DATE_2, 'J'));
-- Get seconds since midnight from first date (DATE_1)
NSECOND_1 := TO_NUMBER(TO_CHAR(DATE_1, 'SSSSS'));
-- Get seconds since midnight from second date (DATE_2)
NSECOND_2 := TO_NUMBER(TO_CHAR(DATE_2, 'SSSSS'));
RETURN (((NDATE_2 - NDATE_1) * 86400)+(NSECOND_2 - NSECOND_1));
END time_diff;
/
Halim is a Sr. Database Engineer/Data Architect (in Atlanta, USA) who is an Oracle certified (OCP) DBA, (OCP) Developer, Certified Cloud Architect Professional as well as OCI Autonomous DB specialist with extensive expertise in Database design, configuration, tuning, capacity planning, RAC, DG, Scripting, Python, PL/SQL etc. He achieved 16th position in worldwide first-ever PL/SQL Challenge cup playoff- http://plsql-challenge.blogspot.com/2010/07/winners-of-first-plsql-challenge.html
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