ระบุจำนวนผู้ป่วยที่วินิจฉัยชื่อสั้นว่า รัฐวิตกกังวล และเส้นทางยาเป็นทางปากหรือไม่ ไม่จำเป็นต้องใช้ทุกตาราง
provide the number of patients whose diagnoses short title is anxiety state nos and drug route is oral?It is not neccessary to use all the tables.
 demographic:  subject_id [ text]  hadm_id [ text]  name [ text]  marital_status [ text]  age [ text]  dob [ text]  gender [ text]  language [ text]  religion [ text]  admission_type [ text]  days_stay [ text]  insurance [ text]  ethnicity [ text]  expire_flag [ text]  admission_location [ text]  discharge_location [ text]  diagnosis [ text]  dod [ text]  dob_year [ text]  dod_year [ text]  admittime [ text]  dischtime [ text]  admityear [ text] 
SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id INNER JOIN prescriptions ON demographic.hadm_id = prescriptions.hadm_id WHERE diagnoses.short_title = "Anxiety state NOS" AND prescriptions.route = "ORAL"