AGE_IN_YEARS
Returns the difference in years between two dates, expressed as an integer.
	Returns the difference in years between two dates, expressed as an integer.
Behavior type
- 
Immutable if both date arguments are of data type TIMESTAMP 
- 
Stable if either date is a TIMESTAMPTZ or only one argument is supplied 
Syntax
AGE_IN_YEARS( [ date1,] date2 )
Parameters
- date1- date2
- Specify the boundaries of the period to measure. If you supply only one argument, OpenText™ Analytics Database sets date1to the current date. Both parameters must evaluate to one of the following data types:- 
DATE
- 
TIMESTAMP
- 
TIMESTAMPTZ
 If date1<date2, AGE_IN_YEARS returns a negative value.
- 
Examples
Get the age of someone born March 2 1972, as of June 21 1990:
=> SELECT AGE_IN_YEARS('1990-06-21'::TIMESTAMP, '1972-03-02'::TIMESTAMP);
 AGE_IN_YEARS
--------------
           18
(1 row)
If the first date is earlier than the second date, AGE_IN_YEARS returns a negative number:
=> SELECT AGE_IN_YEARS('1972-03-02'::TIMESTAMP, '1990-06-21'::TIMESTAMP);
AGE_IN_YEARS
--------------
          -19
(1 row)
Get the age of someone who was born November 21 1939, as of today:
=> SELECT AGE_IN_YEARS('1939-11-21'::DATE);
 AGE_IN_YEARS
--------------
           77
(1 row)