Monday, June 19, 2023

Explain the String Function ' LEN ' in Tableau with Example?

 In Tableau, the "LEN" function is used to calculate the length of a string, which is the number of characters in the string. It returns an integer value representing the length of the specified string.

The syntax for the LEN function in Tableau is as follows:


Here, "string" is the string for which you want to determine the length.

Let's consider an example to understand the usage of the LEN function:

Suppose we have a dataset of customer names, and we want to calculate the length of each customer name. We can use the LEN function to accomplish this.

  • Create a calculated field by right-clicking on a blank area in the "Data" pane and selecting "Create Calculated Field."
  • In the calculation editor, enter the following formula:

            LEN([Customer Name])

            Here, [Customer Name] is the field containing the customer names for which we want to                         calculate the length.

  • Provide a name for the calculated field, such as "NameLength," and click on the "OK" button.
  • You can now use the "NameLength" field in your analysis. You can display it in a table, use it in other calculations, or apply filters.

The LEN function will calculate the length of each customer name, providing the number of characters in each name.

For example, if the customer name is "John Doe," the LEN function will return 8 because there are eight characters in the name.

By using the LEN function in Tableau, you can obtain the length of strings in your data, which can be useful for various purposes such as data validation, data cleansing, or performing calculations based on the length of strings.

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