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Pandas merge dataframes

Combining 2 dataframes pandas

df_3 = pd.concat([df_1, df_2])

11

Merge on index pandas

pd.merge(df1, df2, left_index=True, right_index=True)

8

Source: stackoverflow.com

Join on column pandas

# df1 as main df and use the feild from df2 and map it into df1

df1.merge(df2,on='columnName',how='left')

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Pandas left join

df.merge(df2, left_on = "doc_id", right_on = "doc_num", how = "left")

4

Pandas merge df

In [41]: result = pd.merge(left, right, on="key")

3

Source: pandas.pydata.org

How to merge two dataframes

df_merge_col = pd.merge(df_row, df3, on='id')

df_merge_col

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