จำนวนผู้ป่วยที่ได้รับยา iv bolus ที่ได้รับการวินิจฉัยว่าเป็นแผลกดทับที่สะโพกมีจำนวนเท่าใด ไม่จำเป็นต้องใช้ทุกตาราง
what is the number of patients on iv bolus route of drug administration who are diagnosed with pressure ulcer of hip?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.long_title = "Pressure ulcer, hip" AND prescriptions.route = "IV BOLUS"