2020-10-06

python实现sql外链接 import pandas as pd df = pd.read_excel(‘table2.xlsx’) df1 = pd.read_excel(‘table3.xlsx’) df2 = df.merge(df1, how = ‘outer’, on = ‘学号’).fillna(0) df2[[‘上网总时间’]] = df2[[‘上网总时间’]].astype(i

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