Dynamic RLS with USERNAME in Power BI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the DAX expression to get the current user's username.

Power BI

CurrentUser = [1]()

Drag options to blanks, or click blank then click option'

AUSEREMAIL

BUSERPRINCIPALNAME

CUSERNAME

DUSERID

Attempts:

3 left

💡 Hint

Common Mistakes

Using USERPRINCIPALNAME() instead of USERNAME()

Trying to use USEREMAIL() which is not a valid DAX function

Using USERID() which does not exist in DAX

The USERNAME() function returns the current user's username in Power BI, which is essential for dynamic row-level security.

2fill in blank

medium

Complete the FILTER expression to restrict data to rows where the 'Salesperson' column matches the current user.

Power BI

FILTER(Sales, Sales[Salesperson] = [1]())

Drag options to blanks, or click blank then click option'

AUSERNAME

BCURRENTUSER

CUSERPRINCIPALNAME

DUSEREMAIL

Attempts:

3 left

💡 Hint

Common Mistakes

Using USERPRINCIPALNAME() which returns email format and may not match 'Salesperson' values

Using a non-existent function CURRENTUSER()

Using USEREMAIL() which is invalid in DAX

The USERNAME() function returns the current user's username, which you compare to the 'Salesperson' column to filter rows dynamically.

3fill in blank

hard

Fix the error in the DAX expression to correctly filter rows for dynamic RLS.

Power BI

FILTER(Employees, Employees[Username] = [1])

Drag options to blanks, or click blank then click option'

AUSERNAME()

BUSERNAME

CUSERPRINCIPALNAME()

DCURRENTUSER()

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting parentheses after USERNAME

Using USERPRINCIPALNAME() which might not match the 'Username' column format

Using a non-existent function CURRENTUSER()

The function USERNAME() must include parentheses to be called correctly in DAX.

4fill in blank

hard

Fill both blanks to create a DAX filter that allows access only if the current user matches the 'UserEmail' column.

Power BI

FILTER(Users, Users[UserEmail] = [1]() && [2](Users[UserEmail], 12) = "@company.com")

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AUSERPRINCIPALNAME

BUSERNAME

CRIGHT

DLEFT

Attempts:

3 left

💡 Hint

Common Mistakes

Using USERNAME() which returns username, not email

Using LEFT instead of RIGHT to check email domain

Omitting parentheses after USERPRINCIPALNAME

USERPRINCIPALNAME() returns the user's email, and RIGHT extracts the domain part to check if it matches '@company.com'.

5fill in blank

hard

Fill all three blanks to create a DAX expression that filters the 'Sales' table for rows where the 'Region' matches the user's region stored in a 'UserRegion' table.

Power BI

FILTER(Sales, Sales[Region] = RELATED([1][[2]]) && RELATED([1][Email]) = [3]())

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AUserRegion

BRegionName

CUSERNAME

DUSERPRINCIPALNAME

Attempts:

3 left

💡 Hint

Common Mistakes

Using USERNAME instead of USERPRINCIPALNAME for email comparison

Swapping table and column names

Omitting parentheses after USERPRINCIPALNAME

RELATED(UserRegion[RegionName]) gets the user's region, and USERPRINCIPALNAME() returns the user's email to match the current user.