WEEK_FLOOR
Description
Rounds down a datetime value to the nearest specified week interval. If a starting time (origin) is provided, it uses that time as the reference for calculating the interval.
Syntax
WEEK_FLOOR(<datetime>)
WEEK_FLOOR(<datetime>, <origin>)
WEEK_FLOOR(<datetime>, <period>)
WEEK_FLOOR(<datetime>, <period>, <origin>)
Parameters
| Parameter | Description |
|---|---|
<datetime> | The datetime value to round down, of type DATETIME or DATETIMEV2 |
<period> | The week interval value, of type INT, representing the number of weeks in each interval |
<origin> | The starting point for the interval, of type DATETIME or DATETIMEV2; defaults to 0001-01-01 00:00:00 |
Return Value
Returns a value of type DATETIME, representing the rounded-down datetime value. The time portion of the result will be set to 00:00:00.
Note:
- If no period is specified, it defaults to a 1-week interval.
- The period must be a positive integer.
- The result is always rounded down to a past time.
- The time portion of the returned value is always set to 00:00:00.
Example
SELECT WEEK_FLOOR('2023-07-13 22:28:18', 2);
+------------------------------------------------------------+
| week_floor(cast('2023-07-13 22:28:18' as DATETIMEV2(0)), 2) |
+------------------------------------------------------------+
| 2023-07-03 00:00:00 |
+------------------------------------------------------------+
