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DATEDIFF

Subtracts to find the number of days between two dates.

Syntax

DATEDIFF(date1, date2)

Arguments

Return Type

Integer. If date1 or date2 is not a valid date, returns NULL.

Examples

mysql> select datediff('2017-03-27', '2017-03-26') as days_til_graduation;
+---------------------+
| days_til_graduation |
+---------------------+
|                   1 |
+---------------------+

If date1 is in the past, the function returns a negative result.

mysql> select datediff('2017-03-26', '2017-03-27') as days_til_graduation;
+---------------------+
| days_til_graduation |
+---------------------+
|                  -1 |
+---------------------+

now() can be used as one of the parameters.

mysql> select datediff('2099-12-31', now()) as days_til_graduation;
+---------------------+
| days_til_graduation |
+---------------------+
|               30229 |
+---------------------+
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