Explain the Number Function ' ROUND ' in Tableau with Example?

In Tableau, the ROUND function is a number function that rounds a given number to a specified number of decimal places or to the nearest integer. It is used to control the precision of numeric values.

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

ROUND(number, num_decimal_places)

• number represents the numeric value that you want to round.
• num_decimal_places (optional) represents the number of decimal places to which you want to round. If not specified, it defaults to 0, rounding to the nearest whole number.

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

Suppose you have a dataset with a column called "Value" that contains different numeric values.

Value
3.1415
2.7182
4.5678
6.7890

To round each value in the "Value" column to two decimal places using the ROUND function, you can create a calculated field in Tableau:

1. Right-click on a blank area in the "Data" pane in Tableau.
2. Select "Create Calculated Field."
3. In the formula editor, enter the following expression:

ROUND([Value], 2)

4. Click "OK" to create the calculated field.

The calculated field, which utilizes the ROUND function, will round each value in the "Value" column to two decimal places.

The resulting dataset will be as follows:

Value	Rounded Value
3.1415	3.14
2.7182	2.72
4.5678	4.57
6.7890	6.79

In this example, the ROUND function rounds each value in the "Value" column to two decimal places.

The ROUND function is commonly used to control the precision of numeric values in data analysis and visualization. It can be applied to various scenarios, such as rounding currency values, percentage values, or any other numeric metric where you want to control the number of decimal places. By utilizing the ROUND function in Tableau, you can ensure your numeric values are presented in the desired precision.