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How To Calculate Date and Time Differences
How To Calculate Date and Time Differences? - Oracle DBA FAQ - Understanding SQL Basics
✍: FYIcenter.com
If you want to know how many years, months, days and seconds are there between two dates or times, you can use the date and time interval expressions: YEAR ... TO MONTH and DAY ... TO SECOND. The tutorial exercise below gives you some good examples:
SELECT (TO_DATE('01-MAY-2006 16:52:57','DD-MON-YYYY HH24:MI:SS') - TO_DATE('31-JAN-1897 09:26:50','DD-MON-YYYY HH24:MI:SS')) YEAR(4) TO MONTH FROM DUAL; -- 109 years and 3 months 109-3 SELECT (TO_DATE('01-MAY-2006 16:52:57','DD-MON-YYYY HH24:MI:SS') - TO_DATE('31-JAN-1897 09:26:50','DD-MON-YYYY HH24:MI:SS')) DAY(9) TO SECOND FROM DUAL; -- 39901 days and some seconds 39901 7:26:7.0 SELECT (TO_TIMESTAMP('01-MAY-2006 16:52:57.847', 'DD-MON-YYYY HH24:MI:SS.FF3') - TO_TIMESTAMP('31-JAN-1897 09:26:50.124', 'DD-MON-YYYY HH24:MI:SS.FF3')) YEAR(4) TO MONTH FROM DUAL; -- 109 years and 3 months 109-3 SELECT (TO_TIMESTAMP('01-MAY-2006 16:52:57.847', 'DD-MON-YYYY HH24:MI:SS.FF3') - TO_TIMESTAMP('31-JAN-1897 09:26:50.124', 'DD-MON-YYYY HH24:MI:SS.FF3')) DAY(9) TO SECOND FROM DUAL; -- 39901 days and some fractional seconds 39901 7:26:7.723000000
2007-04-23, 5322👍, 0💬
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