Create date from day, month, year fields in MySQL

Question

I am currently developing an application that displays documents and allows the members to search for these documents by a number of different parameters, one of them being

Answer 1

Expanding this answer, here's my take on it:

DELIMITER $$

CREATE FUNCTION fn_year_month_to_date(var_year INTEGER,
    var_month enum('01', '02', '03', '04', '05', '06', '07', '08', '09', '10', '11', '12')
    )
RETURNS DATE
BEGIN
    RETURN (MAKEDATE(var_year, 1) + INTERVAL (var_month - 1) MONTH);
END $$

DELIMITER ;

SELECT fn_year_month_to_date(2020, 12)
;