instruction: what is the daily maximum mch value for patient 006-99708 in this month?
response: SELECT MAX(lab.labresult) FROM lab WHERE lab.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '006-99708')) AND lab.labname = 'mch' AND DATETIME(lab.labresulttime, 'start of month') = DATETIME(CURRENT_TIME(), 'start of month', '-0 month') GROUP BY STRFTIME('%y-%m-%d', lab.labresulttime)