combine dataframes with two matching columns

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Jesús
23 Jun 2016
1df_outer = pd.merge(df1, df2, on='id', how='outer') #here id is common column
2
3df_outer
4
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Sara
20 Sep 2020
1merged_df = DF2.merge(DF1, how = 'inner', on = ['date', 'hours'])
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Erik
05 Jul 2017
1df_merge_col = pd.merge(df_row, df3, on='id')
2
3df_merge_col
4
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