Help Center/ GaussDB/ Developer Guide(Distributed_V2.0-8.x)/ FAQs/ How do I query the time difference between two time points?
Updated on 2025-08-19 GMT+08:00
View PDF

How do I query the time difference between two time points?

Answer: You can use the following method to calculate the time difference:
  • Use the age() function to calculate the time difference between two time points. 
    gaussdb=# SELECT age(timestamp '2001-04-10 14:00:00', timestamp '2001-04-06 13:00:00');
       age       
-----------------
 4 days 01:00:00
(1 row)
  • Convert strings to the date type and then subtract them. 
    gaussdb=# SELECT ('2001-04-10 14:00:00'::date - '2001-04-06 13:00:00'::date);
 ?column? 
----------
        4
(1 row)
  • Use the date_part() function to obtain the value of the subdomain in a date or time value. 
    gaussdb=# SELECT date_part('day', '2001-04-10 14:00:00'::timestamp - '2001-04-06 13:00:00'::timestamp);
 date_part 
-----------
         4
(1 row)
Parent topic: FAQs