ผู้ป่วย 06/2105 65401 ได้รับการทดสอบแรงโน้มถ่วงจำเพาะกี่ครั้ง?ไม่จำเป็นต้องใช้ตารางทั้งหมด
how many times does in 06/2105 patient 65401 get a specific gravity test?It is not neccessary to use all the tables.
 patients:  row_id [ number]  subject_id [ number]  gender [ text]  dob [ time]  dod [ time] 
SELECT COUNT(*) FROM labevents WHERE labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'specific gravity') AND labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 65401) AND STRFTIME('%y-%m', labevents.charttime) = '2105-06'