Convert SQL to DAX : Subquery

[Anonymous]

Hi All, I am trying to convert the following SQL Code to DAX but i am stuck with implementation of the subquery part.
I am trying to get the Distinct patient count in the selected range also have the appointment booked in the future.
Current Date Range is Dec 1st 2021 to Dec 31st 2021 

select count(distinct patient_id)
from fact_appointment
where appointment_date > '2021-12-31'
and patient_id in
(
select distinct patient_id
from fact_appointment_detail
where appointment_date between '2021-12-01' and '2021-12-31'
)

Any help will good.

[Anonymous]

Hi @v-kkf-msft 

Thanks very much , This approach worked for me. 

[DataInsights]

@Anonymous,

Try this measure:

Patient Count =
CALCULATE (
    DISTINCTCOUNT ( fact_appointment[patient_id] ),
    fact_appointment[appointment_date] > DATE ( 2021, 12, 31 ),
    fact_appointment_detail[appointment_date] >= DATE ( 2021, 12, 1 ),
    fact_appointment_detail[appointment_date] <= DATE ( 2021, 12, 31 )
)

[Anonymous]

This measure is returning blank , its not working

Plus i am trying to add another filter in the DAX
SQL:
select count(distinct patient_id)
from fact_appointment
where appointment_date > '2021-12-31' and product_ID in {'A123','B234','C345'}
and patient_id in
(
select distinct patient_id
from fact_appointment_detail
where appointment_date between '2021-12-01' and '2021-12-31' and
product_ID in {'A123','B234','C345'}
)
DAX tried for this logic :
CALCULATE(DISTINCTCOUNT(fact_appointment[patient_id]),
Filter(ALL(fact_appointment),(
fact_appointment[appointment_date] > MAX(fact_appointment[appointment_date]) && (
fact_appointment[procedure_code] in {"A","C","D"}))),
fact_appointment[office_patient_id] in
(DISTINCT(fact_appointment[office_patient_id])))
but it should add filter condition of product id in the "IN" statement, i am unable to get it .
dax should be like 
CALCULATE(DISTINCTCOUNT(fact_appointment[patient_id]),
Filter(ALL(fact_appointment),(
fact_appointment[appointment_date] > MAX(fact_appointment[appointment_date]) && (
fact_appointment[product_ID] in {"A123","C234","D345"}))),
fact_appointment[office_patient_id] in
(DISTINCT(fact_appointment[office_patient_id]),
fact_appointment[product_ID] in {"A123","C234","D345"}))

[v-kkf-msft · Accepted solution]

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
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.