postgres difference between two timestamps in days

SELECT AGE('2012-03-05', '2010-04-01'), DATE_PART('year', AGE('2012-03-05', '2010-04-01')) AS years, DATE_PART('month', AGE('2012-03-05', '2010-04-01')) AS months, DATE_PART('day', AGE('2012-03-05', '2010-04-01')) AS days; ... -- This will give you full years, month, days ... between two dates: -- age | years | months | days -- -----------------------+-------+--------+------ -- 1 year 11 mons 4 days | 1 | 11 | 4

postgres time difference in minutes

CREATE OR REPLACE FUNCTION DateDiff (units VARCHAR(30), start_t TIME, end_t TIME) 
     RETURNS INT AS $$
   DECLARE
     diff_interval INTERVAL; 
     diff INT = 0;
   BEGIN
     -- Minus operator for TIME returns interval 'HH:MI:SS'  
     diff_interval = end_t - start_t;
 
     diff = DATE_PART('hour', diff_interval);
 
     IF units IN ('hh', 'hour') THEN
       RETURN diff;
     END IF;
 
     diff = diff * 60 + DATE_PART('minute', diff_interval);
 
     IF units IN ('mi', 'n', 'minute') THEN
        RETURN diff;
     END IF;
 
     diff = diff * 60 + DATE_PART('second', diff_interval);
 
     RETURN diff;
   END;
   $$ LANGUAGE plpgsql;

Posted by: Guest on February-07-2020

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