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timestampdiff

Description​

Returns the interval from datetime_expr2 to datetime_expr1. datetime_expr1 and datetime_expr2 must be of the DATE or DATETIME type.

The unit for the integer result and the interval should be one of the following:

MILLISECOND (since 3.2), SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, or YEAR.

Syntax​

INT TIMESTAMPDIFF(unit,DATETIME datetime_expr1, DATETIME datetime_expr2)

Parameters​

  • datetime_expr: the two DATE or DATETIME expressions you want to compare.
  • unit: the unit of the time difference. Supported units include MILLISECOND (since 3.2), SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, and YEAR.

Return value​

Returns an INT value.

Examples​

MySQL> SELECT TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01');
+--------------------------------------------------------------------+
| timestampdiff(MONTH, '2003-02-01 00:00:00', '2003-05-01 00:00:00') |
+--------------------------------------------------------------------+
|                                                                  3 |
+--------------------------------------------------------------------+

MySQL> SELECT TIMESTAMPDIFF(YEAR,'2002-05-01','2001-01-01');
+-------------------------------------------------------------------+
| timestampdiff(YEAR, '2002-05-01 00:00:00', '2001-01-01 00:00:00') |
+-------------------------------------------------------------------+
|                                                                -1 |
+-------------------------------------------------------------------+

MySQL> SELECT TIMESTAMPDIFF(MINUTE,'2003-02-01','2003-05-01 12:05:55');
+---------------------------------------------------------------------+
| timestampdiff(MINUTE, '2003-02-01 00:00:00', '2003-05-01 12:05:55') |
+---------------------------------------------------------------------+
|                                                              128885 |
+---------------------------------------------------------------------+

MySQL > SELECT TIMESTAMPDIFF(MILLISECOND,'2003-02-01','2003-05-01');
+--------------------------------------------------------+
| timestampdiff(MILLISECOND, '2003-02-01', '2003-05-01') |
+--------------------------------------------------------+
|                                             7689600000 |
+--------------------------------------------------------+

keyword​

TIMESTAMPDIFF