Convert SQL to DAX : Subquery

Hi Anonymous ,

I create the following sample data.

Then create the measure:

CountID = 
CALCULATE (
    DISTINCTCOUNT ( fact_appointment[patient_id] ),
    FILTER (
        fact_appointment,
        fact_appointment[appointment_date] > DATE ( 2021, 12, 31 )
            && fact_appointment[product_ID]
                IN { "A123", "B234", "C345" }
                    && fact_appointment[patient_id]
                        IN CALCULATETABLE (
                            VALUES ( fact_appointment_detail[patient_id] ),
                            FILTER (
                                fact_appointment_detail,
                                fact_appointment_detail[product_ID]
                                    IN { "A123", "B234", "C345" }
                                        && fact_appointment_detail[appointment_date] >= DATE ( 2021, 12, 1 )
                                        && fact_appointment_detail[appointment_date] <= DATE ( 2021, 12, 31 )
                            )
                        )
    )
)

If the problem is still not resolved, please provide detailed error information or the expected result you expect. Let me know immediately, looking forward to your reply.
Best Regards,
Winniz
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