SELECT count(T1.SSN) FROM patient AS T1 JOIN prescribes AS T2 ON T1.SSN  =  T2.patient JOIN physician AS T3 ON T2.physician  =  T3.employeeid WHERE T3.name = "John Dorian"
How many patients' prescriptions are made by physician John Dorian?
SELECT count ( T1.SSN ) FROM patient AS T1 JOIN prescribes AS T2 ON T1.SSN = T2.patient JOIN physician AS T3 ON T2.physician = T3.employeeid WHERE T3.name = `` John Dorian ''
select count ( t1 . ssn ) from patient as t1 join prescribes as t2 on t1 . ssn = t2 . patient join physician as t3 on t2 . physician = t3 . employeeid where t3 . name = value
How many patients ' prescriptions are made by physician John Dorian ?