interval SQL code example

Example 1: mysql add days to date

UPDATE classes 
SET `date` = DATE_ADD(`date`, INTERVAL 2 DAY)
WHERE id = 161

Example 2: postgresql today - 1 year

select now() - INTERVAL '1 YEAR';

Example 3: mysql add days to date

UPDATE classes 
SET `date` = DATE_ADD(`date` , INTERVAL 2 DAY)
WHERE `id` = 161;