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Apa yang dilakukan query berikut? SELECT patient_name FROM PATIENT EXCEPT ...

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Apa yang dilakukan query berikut?

SELECT patient_name

FROM PATIENT

EXCEPT (

SELECT p.patient_name

FROM PATIENT p

JOIN DOCTOR_APPOINTMENT da ON p.patient_id = da.patient_id

JOIN DOCTOR d ON da.doctor_id = d.doctor_id

WHERE d.year_experience <= 10

)

EXCEPT (

SELECT p.patient_name

FROM PATIENT p

JOIN DOCTOR_APPOINTMENT da ON p.patient_id = da.patient_id

JOIN DOCTOR d ON da.doctor_id = d.doctor_id

WHERE d.year_experience > 10

EXCEPT (

SELECT p.patient_name

FROM PATIENT p

JOIN DOCTOR_APPOINTMENT da ON p.patient_id = da.patient_id

JOIN DOCTOR d ON da.doctor_id = d.doctor_id

WHERE d.year_experience <= 10

)

);
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