How old was Mr. Stacy Morar at the time of his first emergency room admission due to a drug overdose?
how old = SUBTRACT(MIN(encounters.DATE), patients.birthdate); his first emergency room admission refers to MIN(encounters.DATE); drug overdose refers to encounters.REASONDESCRIPTION = 'Drug overdose' ;
SELECT T2.DATE - T1.birthdate AS age FROM patients AS T1 INNER JOIN encounters AS T2 ON T1.patient = T2.PATIENT WHERE T1.first = 'Stacy' AND T1.last = 'Morar' AND T2.DESCRIPTION = 'Emergency Room Admission' AND T2.REASONDESCRIPTION = 'Drug overdose' ORDER BY T2.DATE LIMIT 1