SELECT count(patient) FROM stay WHERE room  =  112
How many patients stay in room 112?
[Schema (values) (types)]: | hospital_1 |  Physician : employeeid (text) , name (number) , position (text) , ssn (text) | Department : departmentid (text) , name (number) , head (text) | Affiliated_With : physician (text) , department (number) , primaryaffiliation (text) | Procedures : code (text) , name (number) , cost (text) | Trained_In : physician (text) , treatment (number) , certificationdate (text) , certificationexpires (text) | Patient : ssn (text) , name (number) , address (text) , phone (text) , insuranceid (number) , pcp (number) | Nurse : employeeid (text) , name (number) , position (text) , registered (text) , ssn (number) | Appointment : appointmentid (text) , patient (number) , prepnurse (text) , physician (text) , start (number) , end (number) , examinationroom (text) | Medication : code (text) , name (number) , brand (text) , description (text) | Prescribes : physician (text) , patient (number) , medication (text) , date (text) , appointment (number) , dose (number) | Block : blockfloor (text) , blockcode (number) | Room : roomnumber (text) , roomtype (number) , blockfloor (text) , blockcode (text) , unavailable (number) | On_Call : nurse (text) , blockfloor (number) , blockcode (text) , oncallstart (text) , oncallend (number) | Stay : stayid (text) , patient (number) , room (text) , staystart (text) , stayend (number) | Undergoes : patient (text) , procedures (number) , stay (text) , dateundergoes (text) , physician (number) , assistingnurse (number);