In a 1:* relationship, if an item being looked up has no match then show the item, else show match

[Anonymous]

Hey,

I have a table with coded values:

- LM20

- LM30

And another table to decode those values:

- LM20 = Neon Blue

But many values have no match (like LM30 above). The result is a useless aggregation of all blanks in visualizations. Is there any way to tell Power BI to show me the coded value if the decoded value does not exist? I should mention that these tables are joined via a via an ID and Key, I'm unsure if DAX has a way to detect if something evaluates to a blank between relationships.

Thanks!

[Anonymous · Accepted solution]

Hi @Anonymous

Try this.

DESCC = IF(RELATED(Detail[Desc])= BLANK(),Master[Code],RELATED(Detail[Desc]))

Thanks

Raj

[Anonymous]

I'll also add that while this works for the * side of the relationship, it does not work for the 1 side of the 1-* relationship. I worked around this by getting a distinctcount from the 1 side of the table, and subtracting it against a distinct count from the * side of the table, a positive number indicating some keys were missing.

[Anonymous]

Works like a charm as a new column, thank you very much!