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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 |
+----------------------------------------------------------+