df_outer = pd.merge(df1, df2, on='id', how='outer') #here id is common column
df_outer
df_3 = pd.concat([df_1, df_2])
df_merge_col = pd.merge(df_row, df3, on='id')
df_merge_col
df = pd.concat( [df1,df2,df3], ignore_index=True )
# Stack the DataFrames on top of each other
vertical_stack = pd.concat([survey_sub, survey_sub_last10], axis=0)
# Place the DataFrames side by side
horizontal_stack = pd.concat([survey_sub, survey_sub_last10], axis=1)
df_merge_col = pd.merge(df_row, df3, on='id')
df_merge_col
concat = pd.merge(data_1, data_2, how='inner')
df_cd = pd.merge(df_SN7577i_c, df_SN7577i_d, how='inner', left_on = 'Id', right_on = 'Id')
pd.concat([df1, df2])
pd.concat([df1, df2])