Add a row with custom value in Report Builder

Hi GeorgeColl ,

To add a custom row like " _No Value Exists" to your list of values in DAX, you can use the UNION function to combine your original dataset with a manually created one-row table. This is useful when you want to include a default or placeholder option in your parameter list in Report Builder.

The key to achieving this is the ROW function, which lets you define a table with a single row and one or more columns. In your case, you only need one column — Insured Name Simplification — and one value for that column.

Here's how you can modify your existing query:

EVALUATE
UNION(
    ROW("Insured Name Simplification", "  _No Value Exists"),
    SUMMARIZECOLUMNS('CAClaims'[Insured Name Simplification])
)
ORDER BY [Insured Name Simplification]

This query will return a table with your original insured names from the CAClaims table, along with one additional row that has the custom value " _No Value Exists". The ORDER BY ensures that the list appears sorted, and your custom entry will be positioned accordingly, depending on its alphabetical order.

If you plan to make this value behave differently — for example, not applying a filter when selected — you'll need to account for it in your measures or filtering logic. But for the purpose of simply adding it to the dropdown list, this query does exactly what you need.

Best regards,