Since we are working with an Azure SQL database, we need to fill the
generated customer data in a fitting schema. The schema will be
described in more detail in an updated README file later.
The added script uses `pyodbc` to connect to the database and create the
tables. This requires a connection string, which will not be checked out
to this repo for security reasons and must be obtained separately.
Additionally, a script `test_sql_connection.py` is added with this
commit, which is a simple utility to test the `pyodbc` connection.
