บอกราคาเมอร์เรมหน่อยค่ะ ไม่จำเป็นต้องใช้ทุกโต๊ะ
tell me the price of merrem.It is not neccessary to use all the tables.
 intakeoutput:  intakeoutputid [ number]  patientunitstayid [ number]  cellpath [ text]  celllabel [ text]  cellvaluenumeric [ number]  intakeoutputtime [ time] 
SELECT DISTINCT cost.cost FROM cost WHERE cost.eventtype = 'medication' AND cost.eventid IN (SELECT medication.medicationid FROM medication WHERE medication.drugname = 'merrem')