• ⌂ Date & Time
• Functions
  • ADDDATE()
  • ADDTIME()
  • CURDATE()
  • CURRENT_DATE()
  • CURRENT_TIME()
  • CURRENT_TIMESTAMP()
  • CURTIME()
  • DATE()
  • DATEDIFF()
  • DATE_ADD()
  • DATE_FORMAT()
  • DATE_SUB()
  • DAY()
  • DAYOFMONTH()
  • DAYOFYEAR()
  • HOUR()
  • MICROSECOND()
  • MINUTE()
  • MONTH()
  • NOW()
  • SECOND()
  • TIME()
  • TIMEDIFF()
  • UNIX_TIMESTAMP()
  • WEEK()
  • WEEKDAY()
  • YEAR()

DATE_ADD()

Add a positive or negative amount of time to a date or timestamp.

Prototype

mixed DATE_ADD(mixed $date, INTERVAL integer $amount UNIT)

Parameters

• date - A date (YYYY-MM-DD) or timestamp (YYYY-MM-DD HH:MM:SS).
• amount - A positive or negative number of UNITs to add to the date.
• UNIT - One of the following keywords: MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, YEAR, SECOND_MICROSECOND, MINUTE_MICROSECOND, MINUTE_SECOND, HOUR_MICROSECOND, HOUR_SECOND, HOUR_MINUTE, DAY_MICROSECOND, DAY_SECOND, DAY_MINUTE, DAY_HOUR, YEAR_MONTH.

Return

If a date is provided, the adjusted date string is returned.  If a timestamp is provided, the adjusted timestamp string is returned.  If there is an error, such as an invalid date, NULL is returned.

Example

SELECT OID, Date, DATE_ADD(Date, INTERVAL 30 DAY) AS DueDate FROM Invoice

Related

ADDDATE()

• < DATEDIFF()
• DATE_FORMAT() >