How can I create a user table with dax ?

[paulineCom]

Hello,

Here is my problem : I have a huge table in direct query with a column named "name_user" it contain a dozen of differents users. 

I want to create role that match their "name_user" with the value that the USERNAME() function is sending.

But in order to do that, i need to create a dimention table of user like this :

user id ; user name (that refers to mu "name_user" ; the result of the USERNAME() function.

I will fill up the table because i know what is the username() of the different "name_user"

And then i'll be abble to create roles to filter my table in function of their username.

So my question is : how do I create a table just with 3 columns ? I've tried to follow the documentation but there is always some errors in my code. Maybe an exemple would help me a lot.

Many thanks.

[MFelix · Accepted solution]

Hi @paulineCom ,

Can you give a little bit more information please? What is the syntax you are using and the information you want to place in the table.

To creata a table in dax you have several options but this depends on the way you want to build you can do:

Table2 =
ADDCOLUMNS (
    DISTINCT ( 'Table'[Name] );
    "E-mail"; 'Table'[Name] & "@gmail.com";
    "Role"; SWITCH ( 'Table'[Name]; "A"; "MANAGER"; "WORKER" )
)

This table uses the distinct values of Name column in another tables and add two additional tables one with e-mail and another with role based no the name of the person

You can also create a table with a single column:

Table2 = DISTINCT ( 'Table'[Name] )

And the add each individual column:

E-mail = 'Table2'[Name] & "@gmail.com"

Role = SWITCH ( 'Table2'[Name]; "A"; "MANAGER"; "WORKER" )

You can create a table with all values written direcftly in the code:

Table 3 =
UNION (
    ROW ( "Name"; "A"; "E-mail"; "A@gmail.com"; "Role"; "Manager" );
    ROW ( "Name"; "B"; "E-mail"; "B@gmail.com"; "Role"; "Worker" );
    ROW ( "Name"; "C"; "E-mail"; "C@gmail.com"; "Role"; "Worker" )
)

There is a various number of ways to build this, I know I have been very generic but without any sample data is difficult to pin point what is happening in your model.

[paulineCom]

Hello thank you both for your help,

It's working thanks to the syntax @MFelix  gave me.

Have a nice day 🙂

[Pragati11]

Hi @paulineCom ,

Did you try selecting just 3 columns from your main table and creating your table?

You can do this easily in Query editor in Power BI.

1. Richt click on your base table -> select REFERENCE (this creates a new table)
2. select the columns you want in this table and delete others.
3. Remove duplicate rows from your USER column.
4. Create a relationship as required.

Thanks,

Pragati