ผู้ป่วย 97314 มีปริมาณโพแทสเซียมสูงสุดในปี 03/ปีนี้เป็นครั้งแรกเมื่อใด? ไม่จำเป็นต้องใช้ตารางทั้งหมด
when did patient 97314 have the maximum amount of potassium in 03/this year for the first time?It is not neccessary to use all the tables.
 labevents:  row_id [ number]  subject_id [ number]  hadm_id [ number]  itemid [ number]  charttime [ time]  valuenum [ number]  valueuom [ text] 
SELECT labevents.charttime FROM labevents WHERE labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 97314) AND labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'potassium') AND DATETIME(labevents.charttime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year') AND STRFTIME('%m', labevents.charttime) = '03' ORDER BY labevents.valuenum DESC, labevents.charttime LIMIT 1