Tableau Logical Functions

Tableau provides various Logical Functions to perform logical operations on our data. They are AND, NOT, OR, IF, ELSEIF, IF Else, CASE, ISNULL, IFNULL, ZN, IIF etc. In this article, we will show you, How to use Tableau Logical Functions with examples.

To demonstrate these Tableau Logical Functions, we are going to use the data present in the Global Super Store Excel Worksheet. So, Please refer Connecting to Excel Files in Tableau article to understand the connection settings.

Tableau Logical Functions

The following examples will show you the list of Logical Functions in Tableau

Tableau AND Function

The Tableau AND function is used to check multiple expressions. The syntax of the Tableau AND Function is as shown below:

Expression_1 AND Expression_2

As you can see from the above syntax, Tableau AND function accept two arguments: If both the conditions are True then it will return True otherwise, it returns False.

To demonstrate these logical functions in tableau, we have to use Calculated Field. In order to create a calculated field, please navigate to Analysis Tab and select the Create Calculated Field… option as shown below.

Once you click on the Create Calculated Field… option, following window will be opened. Here, we renamed the default calculation name as AND Func.

This will check whether the Profit is greater than 0, and Quantity is greater than 25000. If both these conditions are true then the function will return Good otherwise, it will return Bad

IF(SUM([Profit]) > 0 AND SUM(Quantity) > 25000) THEN 'Good'
ELSE 'Bad'
END

Let me add this AND function calculated field to the table (by dragging a field to Rows Shelf). Please refer Create Table Report article to understand the process of creating a table

Tableau OR Function

The Tableau OR function is like either or statement in English. If both the conditions are False then it will return False otherwise, it returns True. The syntax of this Tableau OR Function is:

Expression_1 OR Expression_2

Below statement will return Good if either of these two statements are True

IF(SUM([Profit]) > 0 OR SUM(Quantity) > 300000) THEN 'Good'
ELSE 'Bad'
END

Let me add this field to Rows shelf

Tableau IIF Function

The Tableau IIF function is the simple version of If Else Function. If both the condition is True then it will return First Statement otherwise, the second statement. The syntax of this Tableau IIF Function is:

IIF(Expression, True_statement, False_Statement)

Below statement will return Profit if the condition is True otherwise, Loss will be returned.

IIF(SUM([Profit]) > 0, 'Profit', 'Loss')

Now you can see the result of the Table IIF function

Tableau NOT Function

The Tableau NOT function return the exact opposite. I mean, True will become false and vice versa. The syntax of this Tableau NOT Function is:

NOT(Expression)

Below statement will return Loss if the condition is True otherwise, Profit will be returned.

IF(NOT SUM([Profit]) > 0) THEN 'Profit' 
   ELSE 'Loss'
END

You can see the NOT function result by yourself

Tableau ISNULL Function

To demonstrate this Tableau ISNULL function, we will use the below-shown table.

Tableau ISNULL function will check whether it is NULL or Not. If it is NULL then it returns TRUE otherwise, False will be returned.

The syntax of the Tableau ISNULL Function is:

ISNULL(Expression)

Below statement will check nulls in Service Grade 2 column.

ISNULL([Service Grader 2])

As you can see, this Tableau ISNULL function returned True for the products under Blue Color.

Tableau ZN Function

Tableau ZN function will return the original values of Not Null values, and 0 for Null values. In simple English, ZN in Tableau is used to replace the NULL values with 0.

The syntax of the Tableau ZN Function is: