Compare one to many column values between two tables

[Anonymous]

Hello,

I have a Students table that lists each UserID value once.

I want to know in a new column in the Students table if the UserID field has any matching values in the Infractions table.

It can either be the UserID value or a 1 for a match or a 0 for a non-match.

In the Infractions table, there can be many rows or no rows at all that match the UserID field from the Student table.

PBIX file with two tables mentioned above

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Excel example of the result I am looking for.

[Anonymous]

@HotChilli That worked perfectly! Thank you very much for your time and expertise. I like that it gave me a count of the infractions. Take care!

[HotChilli · Accepted solution]

Thank you for posting the data.

If you want to create a calculated column in the Students table, the existing relationship makes things reasonably straightforward.

NewCol = CALCULATE(COUNT(Infractions[Infraction]))

That will give you the count for each student. If you want a 1 or 0 you just edit the formula using an IF statement.

Let me know if that helps.