[mysql] MySQL add days to a date

I have a table in MySQL. What would be the sql statement look like to add say 2 days to the current date value in the table?

UPDATE classes 
SET 
date = date + 1
where id = 161

this adds one second to the value, i don't want to update the time, i want to add two days?

This query stands good for fetching the values between current date and its next 3 dates

SELECT * FROM tableName
WHERE columName BETWEEN CURDATE() AND DATE_ADD(CURDATE(), INTERVAL 3 DAY)

This will eventually add extra 3 days of buffer to the current date.

SET date = DATE_ADD( fieldname, INTERVAL 2 DAY )

For your need:

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

update tablename set coldate=DATE_ADD(coldate, INTERVAL 2 DAY)

UPDATE table SET nameofdatefield = ADDDATE(nameofdatefield, 2) WHERE ...

 DATE_ADD(FROM_DATE_HERE, INTERVAL INTERVAL_TIME_HERE DAY) 

will give the Date after adjusting the INTERVAL

eg.

DATE_ADD(NOW(), INTERVAL -1 DAY) for deducting 1 DAY from current Day
DATE_ADD(NOW(), INTERVAL 2 DAY)  for adding 2 Days

You can use like

UPDATE classes WHERE date=(DATE_ADD(date, INTERVAL 1 DAY)) WHERE id=161

SELECT DATE_ADD(CURDATE(), INTERVAL 2 DAY)

You can leave date_add function.

UPDATE `table` 
SET `yourdatefield` = `yourdatefield` + INTERVAL 2 DAY
WHERE ...