Advance your Data & AI career with 50 days of live learning, dataviz contests, hands-on challenges, study groups & certifications and more!
Get registeredGet Fabric Certified for FREE during Fabric Data Days. Don't miss your chance! Learn more
I have the DAX below that works correctly.
I want to manually add a value to 'Store'[BaseStoreNumber] = 96 after the result of the lookup.  
Is it possible to do this?
Original result
10, 15, 20
Result needed
10, 15, 20, 96
IF (
'Store'[Class Desc] = "NON-BANNER",
(
'Store'[BaseStoreNumber]
= LOOKUPVALUE (
Security[BaseStoreNumber],
Security[UserPrincipalName], USERPRINCIPALNAME(),
Security[BaseStoreNumber], Store[BaseStoreNumber]
)
)
)
 
					
				
		
Hi @pokdbz
Maybe you can use the UNION() function:
UNION function (DAX) - DAX | Microsoft Learn
Please try this:
VAR _AA =
    IF (
        'Store'[Class Desc] = "NON-BANNER",
        (
            'Store'[BaseStoreNumber]
                = LOOKUPVALUE (
                    Security[BaseStoreNumber],
                    Security[UserPrincipalName], USERPRINCIPALNAME (),
                    Security[BaseStoreNumber], Store[BaseStoreNumber]
                )
        )
    )
RETURN
    UNION ( _AA, { 96 } )
Best Regards
Zhengdong Xu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.
It's saying the UNION function expects a table expression for argument "", but a string or numeric expression was used. Its highlighting the _AA
 
					
				
				
			
		
Advance your Data & AI career with 50 days of live learning, contests, hands-on challenges, study groups & certifications and more!
Check out the October 2025 Power BI update to learn about new features.
 
            | User | Count | 
|---|---|
| 9 | |
| 5 | |
| 4 | |
| 3 | |
| 3 | 
| User | Count | 
|---|---|
| 23 | |
| 14 | |
| 11 | |
| 10 | |
| 9 |