พยาบาลชื่ออะไรมีนัดมากที่สุด?
What is the name of the nurse has the most appointments?
df_nurse = pd.DataFrame(columns = ['name', 'employeeid']); df_appointment = pd.DataFrame(columns = ['prepnurse'])
df_nurse_id = df_appointment['prepnurse'].value_counts().idxmax(); df_nurse[df_nurse['employeeid'] == df_nurse_id]['name']