DAX Function to Check for Non-Blank Values

This document outlines a DAX function designed to determine if a value is not blank. The function will return a Boolean indicating whether the provided input is not blank.

Function Overview

Purpose

To check if a value is non-blank and return a Boolean result.

DAX Function

IsNotBlank = 
VAR value = SELECTEDVALUE(TableName[ColumnName])
RETURN 
NOT(ISBLANK(value))

Parameters

• TableName: The name of the table containing the column you are checking.
• ColumnName: The name of the column you want to evaluate for non-blank values.

Return Type

• Boolean: Returns TRUE if the value is not blank, otherwise returns FALSE.

Exceptions

• N/A: This function does not raise exceptions, but it assumes that the specified table and column exist in the data model.

Code Explanation

1. VAR value = SELECTEDVALUE(TableName[ColumnName]):

   • This line selects the value from the specified column within the specified table. If there are multiple values, it returns BLANK().

2. RETURN:

   • The RETURN statement begins the output for the DAX expression.

3. NOT(ISBLANK(value)):

   • Checks if the value is blank using the ISBLANK function and returns the negated result. If the value is blank, it will return FALSE; otherwise, it will return TRUE.

Code Usage Example

Assuming you have a table named Sales and a column named Revenue, you can use the function as follows:

SalesNonBlankCheck =
IF(IsNotBlank, "Revenue is not blank", "Revenue is blank")

Practical Scenario

• Use Case: In a sales report, you may want to filter out entries where the Revenue column is blank to focus only on sales with actual numbers.
• Example: Using the IsNotBlank function allows you to create a visual or a calculation aggregate that only considers rows where revenue does exist, providing a clearer business insight.

Conclusion

This DAX function effectively checks for non-blank values in your data model. By using this function, you can ensure that your calculations and visuals only include relevant data, which is critical for accurate reporting.

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