PyQt4 Qsql How to get data from a relational database and display them

I'm trying to get data from a database with 4 Relational tables and display them, how exactly do i do that? this is a second tab within the main application, I opened the database now how do i get the four tables to show up within a table? or using splitters? :S

from PyQt4.QtGui import * 
from PyQt4.QtSql import * 
from PyQt4.QtCore import * 

class Window(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):

        db = QSqlDatabase.addDatabase('Example')
        db.setDatabaseName('Example.db')
        db.open()
        model = QSqlTableModel(self)