I want to select rows according to the month of a date or timestamp column like this:
SELECT id, name, birthday
FROM employee.pers
You can use EXTRACT function, like this:
SELECT id, name, birthday FROM employee.person
WHERE EXTRACT(MONTH FROM birthday) > 10;
Your problem comes from the fact that there is no such thing as Month function in PostgreSQL. Check online documentation here to see what you can get instead. Extract should be enough.