SELECT TIME(NOW());	-- 15:23:07

SELECT CURTIME(NOW());-- 15:23:07

SELECT ABS(-4); -- 4

SELECT 5 MOD 3; -- 2

SELECT CURDATE(); -- 2014-08-25

SELECT ADDDATE(CURDATE(), 1); -- 2014-08-26

SELECT DATE_ADD(CURDATE(),INTERVAL 1 DAY); -- 2014-08-26

SELECT DATEDIFF(‘2014-08-25‘, ‘2014-08-20‘); -- 5

SELECT DATE_FORMAT(NOW(), ‘%Y%m%d%H%i%s‘); -- 20140825152912