Returns the week number for a given date.
Sample usage
WEEK(Date)
Syntax
1) Returns the week from a Date value.
WEEK(date_expression)
2) Returns the week from a compatibility mode Date value.
WEEK(X [,format_string])
Parameters
date_expression- a Date & Time field or expression.X- a field or expression that evaluates to Text, Number, or compatibility mode Date.format_string- format forX. Optional ifXis correctly configured as a semantic date field.
Format strings for compatibility mode dates
Supported date functions accept the following input formats if X is a Text field or expression, or compatibility mode Date:
- Any valid strptime format is accepted.
'BASIC':%Y/%m/%d-%H:%M:%S'DEFAULT_DASH':%Y-%m-%d [%H:%M:%S]'DEFAULT_SLASH':%Y/%m/%d [%H:%M:%S]'DEFAULT_DECIMAL':%Y%m%d [%H:%M:%S'RFC_1123':for example, Sat, 24 May 2008 20:09:47 GMT'RFC_3339':for example, 2008-05-24T20:09:47Z'DECIMAL_DATE':same as'DEFAULT_DECIMAL'
Supported time functions accept the following input format if X is a Number field or expression:
'SECONDS':seconds since Epoch'MILLIS':milliseconds since Epoch'MICROS':microseconds since Epoch'NANOS':nanoseconds since Epoch'JULIAN_DATE':days since Epoch
Examples
| Example formula | Input | Output |
|---|---|---|
WEEK(Date) |
Jan 1, 2019 | 1 |
WEEK(Date as Text, 'BASIC') |
2019/01/01-09:40:45 | 1 |
WEEK(Date as Number, 'SECONDS') |
1561784874 | 26 |
|
|
1562004058620 | 27 |
Notes
This function works with both compatibility mode dates and upgraded Date and Date & Time data types.
This function returns the week number since the start of year per the ISO 8601 standard.