How to calculate column in PostgreSQL

Question

I have a table that contains the id, name and age of a person as an int, for instance 20. I have to create a select that gets the name, age, and year of birth. How can I calculate this?

So far I have this, but it doesn't work:

SELECT name, age, CURRENT_YEAR-age as yearOfBirth
FROM person;

Answer 1

You can do:

SELECT 
  name, 
  age, 
  extract(year from current_date) - age as yearOfBirth
FROM person;