Get certified for free when you join Fabric Data Days 2026 and dive into Fabric, Power BI, SQL, AI, and other essential data skills.
Join nowJuly 28 - August 9 | Final Round of the Power BI Dataviz World Championships. This is your chance. Learn more
Hello,
Example of current situation:
I have 2 separate data sources that I am collating into the same table using UNION DAX command,
However, each table does not have any sort of unique identifier.
Therefore, I would like to add a new column to each table with a unique identifier such as 'TABLE1' and 'TABLE2'
So that when the new table is created using UNION, I will be able to see which row is coming from which table/source (Also allowing me to create my reports based on the unique identifiers).
So what I am simply after, is a way to add a new column to an existing table which I can specify a text string that will input into every row.
Thanks in advance.
Solved! Go to Solution.
Resolved....
Sorry for very stupid question.. Just forgot I could specify text within "xyz"
Wondered why it kept showing as "Failed to resolve name 'testing'. It is not a valid table, variable, or function name."
Resolved....
Sorry for very stupid question.. Just forgot I could specify text within "xyz"
Wondered why it kept showing as "Failed to resolve name 'testing'. It is not a valid table, variable, or function name."
Join us in Barcelona for FabCon and SQLCon, the Fabric, Power BI, SQL, and AI community event. Save €200 with code FABCMTY200.
If you love stickers, then you will definitely want to check out our community sticker challenge, Barcelona edition!
Check out the July 2026 Power BI update to learn about new features.
| User | Count |
|---|---|
| 30 | |
| 28 | |
| 23 | |
| 21 | |
| 19 |
| User | Count |
|---|---|
| 46 | |
| 32 | |
| 21 | |
| 17 | |
| 17 |