Explain the DATE Function ' WEEK' in Tableau with Example?

 In Tableau, the WEEK function is used to extract the week number from a given date. It returns an integer representing the week of the year.

The syntax of the WEEK function in Tableau is as follows:

WEEK(date)

• date is the date value from which you want to extract the week number.

Here's an example to illustrate the usage of the WEEK function in Tableau:

Suppose you have a dataset with a date field called "Order Date" containing various date values. To extract the week number from the "Order Date" field, you can use the WEEK function as follows:

WEEK([Order Date])

In this example, the WEEK function is applied to the "Order Date" field. It will return an integer representing the week number for each date value in the "Order Date" field.

The resulting output will be a column of integers representing the week number for each corresponding date in the "Order Date" field.

The WEEK function in Tableau is useful when you need to analyze or group data based on the week component. You can use it to create visualizations or calculations that depend on the week number, such as analyzing weekly sales performance, comparing trends across different weeks, or calculating aggregates for each week.

It's important to note that the week numbering system can vary depending on the country or region. Tableau uses the ISO week date standard, where a week starts on Monday, and the first week of the year is the week that contains the majority of days of the new year.