After Connecting, you can execute a SQL statement and retrieve the results.

SELECT Procedure

You will need to obtain a cursor before executing any SQL. Once you have one, you can use the cursor's execute method.

cursor = cnxn.cursor()
cursor.execute("SELECT Student_ID, Transaction_Number FROM [CData].[Btrieve].Billing WHERE Student_ID = '22'")

Iterating over the Results

You can use a for loop to iterate over the rows of the resultset. Each row is presented as a tuple containing column values:

for (Student_ID, Transaction_Number) in cursor:
    print("Student_ID = {}, Transaction_Number = {}".format(Student_ID, Transaction_Number))