/Python/Merge pandas

Merge pandas

Combining 2 dataframes pandas

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

9

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')

7

Pd merge on multiple columns

new_df = pd.merge(A_df, B_df,  how='left', left_on=['A_c1','c2'], right_on = ['B_c1','c2'])

7

Source: stackoverflow.com

Pandas left join

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

4

Merge pandas

select * from bricks;

select * from colours;

-3

Source: livesql.oracle.com

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