A TRANSACTION table includes column TRANSACTIONPAYERID, which is the ID of the payer associated with the transaction. Wherever TRANSACTIONPAYERID is NULL, the financial class should be “SELF-PAY”. Please implement a solution so that these transactions are categorized correctly in any analysis by financial class.
Answer below but doesn't work
Measure 1 =
VAR Transaction = SELECTEDVALUE('NULL'[TransactionPayerID]
RETURN
VAR Transaction = SelectedValue('SelfPay'[TransactionType]