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  3. Introduction to Importing Data in Python

Exercise

The power of SQL lies in relationships between tables: INNER JOIN

Here, you'll perform your first INNER JOIN! You'll be working with your favourite SQLite database, Chinook.sqlite. For each record in the Album table, you'll extract the Title along with the Name of the Artist. The latter will come from the Artist table and so you will need to INNER JOIN these two tables on the ArtistID column of both.

Recall that to INNER JOIN the Orders and Customers tables from the Northwind database, Hugo executed the following SQL query:

"SELECT OrderID, CompanyName FROM Orders INNER JOIN Customers on Orders.CustomerID = Customers.CustomerID"

The following code has already been executed to import the necessary packages and to create the engine:

import pandas as pd
from sqlalchemy import create_engine
engine = create_engine('sqlite:///Chinook.sqlite')

Instructions

100 XP
  • Assign to rs the results from the following query: select all the records, extracting the Title of the record and Name of the artist of each record from the Album table and the Artist table, respectively. To do so, INNER JOIN these two tables on the ArtistID column of both.
  • In a call to pd.DataFrame(), apply the method fetchall() to rs in order to fetch all records in rs. Store them in the DataFrame df.
  • Set the DataFrame's column names to the corresponding names of the table columns.