A dataframe is a two-dimensional data structure having multiple rows and columns. In a dataframe, the data is aligned in the form of rows and columns only. A dataframe can perform arithmetic as well as conditional operations. It has mutable size.
import numpy as np import pandas as pd
concat()function does all of the heavy lifting of performing concatenation operations along an axis while performing optional set logic (union or intersection) of the indexes (if any) on the other axes.
Code #2 : DataFrames Merge
Pandas provides a single function, merge(), as the entry point for all standard database join operations between DataFrame objects.
Code #3 : DataFrames Join
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