How do I get PyQt5-QSql set up on Raspberry Pi

[evanmars]

I have been using PyODBC successfully to connect to and query a MSSQL database.
I now want an app that uses PyQt5 for GUI and I noticed that there is a SQL module in PyQt5, so I thought "Why not use that so I have fewer dependencies and imports?"
I could just go on using PyODBC, but I would like to use PyQt5 for learning purposes, if nothing else.

I set up PyODBC as follows:

def get_cnx_cursor():
    connect = pyodbc.connect(
        "Driver={FreeTDS};"
        "Server=MYSERVER;"
        "Port=1433;"
        "Database=mydatabase;"
        "UID=myusername;"
        "PWD=mypassword;"
        "TDS_Version=7.3;"
    return connect, connect.cursor()

That works.

Trying to set up connection with PyQt5:

def createConnection():
    connString =
        f'DRIVER={{SQL Driver}};"\
        f'SERVER=MYSERVER;"\
        f'PORT=1433;"\
        f'DATABASE=mydatabase;"\
        f'UID=myusername;"\
        f'PWD=mypassword;"

    global db
    db = QSqlDatabase.addDatabase('QODBC3')
    db.setDatabaseName(connString)  

    if db.open():
        print('Connected')
    else:
        print('Connection Failed')          

createConnection()

Returns "Connection Failed"

I don't know what I'm doing (obviously) and can't find the info I need.