Daily DAX : Day 445 ISCURRENCY

Power BI DAX Function: ISCURRENCY

Description

The ISCURRENCY function in DAX checks whether a value is of the currency data type (also known as fixed decimal or currency type in Power BI). It returns TRUE if the value is currency, otherwise FALSE.

Note: ISCURRENCY is an alias for ISDECIMAL, as the currency type in DAX is a fixed decimal number with exactly 4 decimal places.

Syntax

ISCURRENCY()

Parameters

  • : The expression or column value to check.

Return Value

A Boolean: TRUE if the value is of currency data type, FALSE otherwise.

Use Cases

  • Validating data types in calculated columns or measures, especially when working with mixed data sources.
  • Conditional logic where different calculations are needed based on whether a value is currency (e.g., financial reports).
  • Debugging or ensuring proper type handling in complex DAX expressions involving unions or type conversions.
  • Applying specific formatting or rounding only to currency-type values.

Example

-- Sample measure to check if a column value is currency
Is Currency Check = 
IF (
    ISCURRENCY ( Sales[Amount] ),
    "Yes, this is a currency value",
    "No, not currency"
)

This can be useful in scenarios with variant data types or when importing data that might mix numeric and currency types.


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