SELECT GREATEST(1,4,7,3,9);
SELECT LEAST('z', 'a', 'f', 'z', '1');
SELECT LEAST('z', 'a', 'f', 'z', '1', -1);
CREATE TABLE Tbl (a int, b int);
INSERT INTO Tbl VALUES (1, 3), (9, 2), (0, 0);
SELECT
a,
b,
LEAST(a, b) least_ab,
GREATEST(a, b) greatest_ab
FROM Tbl;