MySQL add days to a date

问题:

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?

回答1:

Assuming your field is a date type (or similar):

SELECT DATE_ADD(`your_field_name`, INTERVAL 2 DAY)  FROM `table_name`; 

With the example you've provided it could look like this:

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

回答2:

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

回答3:

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.

回答4:

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

回答5:

SELECT DATE_ADD(CURDATE(), INTERVAL 2 DAY) 

回答6:

For your need:

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

回答7:

 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 

回答8:

SET date = DATE_ADD( fieldname, INTERVAL 2 DAY ) 

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