
Example:
My son is turning 18 this year!
dbadmin=> SELECT age_in_years('06/13/2001');
age_in_years
--------------
17
(1 row)
I was curious to know how many months he’s been on the planet, so I figured that I could just multiply his current age by 12.
dbadmin=> SELECT age_in_years('06/13/2001') * 12 age_in_months;
age_in_months
---------------
204
(1 row)
But that’s not completely accurate. It does not take into account that we are already 4 months into the current year, or for any past Leap Years. Luckily there is a built-in Vertica function named AGE_IN_MONTHS that does!
dbadmin=> SELECT age_in_months('06/13/2001') actual_age_in_months;
actual_age_in_months
----------------------
214
(1 row)
Helpful Links:https://www.vertica.com/docs/latest/HTML/Content/Authoring/SQLReferenceManual/Functions/Date-Time/AGE_IN_MONTHS.htm
https://forum.vertica.com/discussion/239587/how-old-am-i
Have fun!