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Edit
timestampdiff
description
Syntax
INT TIMESTAMPDIFF(unit,DATETIME datetime_expr1, DATETIME datetime_expr2)
Timestampdiff returns the interval from datetime_expr2 to datetime_expr1. Here, datetime_expr1 and datetime_expr2 should be date or datetime expressions.
The unit for the integer result and the interval should be one of the following:
SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, or YEAR.
example
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 |
+---------------------------------------------------------------------+
keyword
TIMESTAMPDIFF
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