SELECT 1 + 2;

SELECT (1 + 2) AS res;

SELECT `Code` c, `Name` n, `IndepYear` iy, (2023 - `IndepYear`) AS res FROM country WHERE `IndepYear` IS NOT NULL ORDER BY res;

SELECT `Code` c, `Name` n, `IndepYear` iy, (2023 - `IndepYear`) AS res FROM country WHERE (2023 - `IndepYear`) > 1000 AND `IndepYear` IS NOT NULL ORDER BY res;