Answers for "how to join two dataframes on a column"

merge two dataframes based on column

df_outer = pd.merge(df1, df2, on='id', how='outer') #here id is common column

df_outer

combining 2 dataframes pandas

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

pandas merge multiple dataframes

import pandas as pd
from functools import reduce

# compile the list of dataframes you want to merge
data_frames = [df1, df2, df3]
df_merged = reduce(lambda  left,right: pd.merge(left,right,on=['key_col'],
                                            how='outer'), data_frames)

how to merge two column pandas

DataFrame["new_column"] = DataFrame["column1"] + DataFrame["column2"]