ISONORAFTER DAX Function (Information)

The IsOnOrAfter function is a boolean function that emulates the behavior of Start At clause and returns true for a row that meets all the conditions mentioned as parameters in this function.


ISONORAFTER ( <Value1>, <Value2> [, [<Order>] [, <Value1>, <Value2> [, [<Order>] [, … ] ] ] ] )
Parameter Attributes Description
Value1 Repeatable

Expression to be compared with second parameter.

Value2 Repeatable

Expression to be compared with first parameter.

Order Optional

The order to be applied. 0/FALSE/DESC – descending; 1/TRUE/ASC – ascending.

Return values

Scalar A single boolean value.

Returns TRUE when the set of values passed as arguments in Value1 is “greater than or equal to” the set of values passed as arguments in Value2.


The ISONORAFTER function emulates the behavior of a START AT clause in EVALUATE, and returns TRUE when all of the values passed as argument meet the condition specified.
Usually this function is evaluated in a filter condition during an iteration, applying it to the current row context. However, ISONORAFTER uses the existing evaluation context, so any row context must be created outside of ISONORAFTER, which is not an iterator.

A blank value is matched with BLANK(), in this comparison a blank and an empty string are considered as different values and an empty string is after a blank in ascending order.

» 1 related article
» 1 related function


The following query filters the months greater than or equal to October 2008 by using the ISONORAFTER function in the filter condition of FILTER.

        'Date'[Calendar Year],
        'Date'[Month Number]
        'Date'[Calendar Year], "CY 2008", ASC,
        'Date'[Month Number], 10, ASC
    'Date'[Calendar Year],
    'Date'[Month Number]
--  ISAFTER and ISONORAFTER are useful functions to compare multiple columns
--  A column is compared only if the previous columns have the same value
    SUMMARIZE ( 'Product', 'Product'[Category], 'Product'[Subcategory] ),
            'Product'[Category], "Cameras and camcorders", ASC,
            'Product'[Subcategory], "Digital Cameras", ASC
        ISAFTER (
            'Product'[Category], "Cameras and camcorders", ASC,
            'Product'[Subcategory], "Digital Cameras", ASC )
Category Subcategory OnOrAfterCameraAndCamcorders AfterCameraAndCamcorders
Audio Bluetooth Headphones false false
Audio MP4&MP3 false false
Audio Recording Pen false false
Cameras and camcorders Camcorders false false
Cameras and camcorders Cameras & Camcorders Accessories false false
Cameras and camcorders Digital Cameras true false
Cameras and camcorders Digital SLR Cameras true true
Cell phones Cell phones Accessories true true
Cell phones Home & Office Phones true true
Cell phones Smart phones & PDAs true true
Cell phones Touch Screen Phones true true
Computers Computers Accessories true true
Computers Desktops true true
Computers Laptops true true
Computers Monitors true true
Computers Printers, Scanners & Fax true true
Computers Projectors & Screens true true
Games and Toys Boxed Games true true
Games and Toys Download Games true true
Home Appliances Air Conditioners true true
Home Appliances Coffee Machines true true
Home Appliances Fans true true
Home Appliances Lamps true true
Home Appliances Microwaves true true
Home Appliances Refrigerators true true
Home Appliances Washers & Dryers true true
Home Appliances Water Heaters true true
Music, Movies and Audio Books Movie DVD true true
TV and Video Car Video true true
TV and Video Home Theater System true true
TV and Video Televisions true true
TV and Video VCD & DVD true true

Related articles

Learn more about ISONORAFTER in the following articles:

Related functions

Other related functions are:

Last update: Jul 12, 2024   » Contribute   » Show contributors

Contributors: Alberto Ferrari, Marco Russo

Microsoft documentation:

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Context Transition

This function performs a Context Transition if called in a Row Context. Click to read more.

Row Context

This expression is executed in a Row Context. Click to read more.


Not recommended

The use of this function is not recommended. See Remarks and Related functions for alternatives.

Not recommended

The use of this parameter is not recommended.


This function is deprecated. Jump to the Alternatives section to see the function to use.


A volatile function may return a different result every time you call it, even if you provide the same arguments. Click to read more.


This parameter is deprecated and its use is not recommended.

DirectQuery compatibility

Limitations are placed on DAX expressions allowed in measures and calculated columns.
The state below shows the DirectQuery compatibility of the DAX function.


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