weeks_diff
Description
Returns the week difference between two date expressions (expr1
− expr2
), accurate to the week.
Syntax
BIGINT weeks_diff(DATETIME expr1,DATETIME expr2);
Parameters
-
expr1
: the end time. It must be of the DATETIME or DATE type. -
expr2
: the start time. It must be of the DATETIME or DATE type.
Return value
Returns a BIGINT value.
NULL is returned if the date does not exist, for example, 2022-02-29.
Examples
select weeks_diff('2010-11-30 23:59:59', '2010-1-1 23:59:59');
+--------------------------------------------------------+
| weeks_diff('2010-11-30 23:59:59', '2010-1-1 23:59:59') |
+--------------------------------------------------------+
| 47 |
+--------------------------------------------------------+
select weeks_diff(current_time(), '2010-11-30 23:59:59');
+---------------------------------------------------+
| weeks_diff(current_time(), '2010-11-30 23:59:59') |
+---------------------------------------------------+
| 619 |
+---------------------------------------------------+
select weeks_diff('2010-11-30 23:59:59', '2010-11-24 23:59:59');
+----------------------------------------------------------+
| weeks_diff('2010-11-30 23:59:59', '2010-11-24 23:59:59') |
+----------------------------------------------------------+
| 0 |
+----------------------------------------------------------+