Как подключить мою форму к бд

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QCheckBox, QComboBox
from PyQt5.QtWidgets import QGroupBox, QTableView, QVBoxLayout, QGridLayout
from PyQt5.QtSql     import QSqlDatabase, QSqlQuery, QSqlQueryModel
from PyQt5.QtCore    import Qt
 
class Window(QWidget):
  def __init__(self):
    super().__init__(None)
    self.box = QVBoxLayout()
    self.selector = QComboBox()
    self.view = QTableView()
    self.view.setModel(QSqlQueryModel())
    group = QGroupBox()
    group.setLayout(self.box)
    tables = QSqlQueryModel()
    tables.setQuery("SELECT id_faculty FROM faculty();")
    self.selector.currentIndexChanged.connect(self.updateBox)
    self.selector.setModel(tables)
    l = QGridLayout()
    l.addWidget(self.selector, 0, 0)
    l.addWidget(group, 1, 0)
    l.addWidget(self.view, 0, 1, 2, 1)
    self.setLayout(l)
 
  def updateBox(self):
    while True:
      child = self.box.takeAt(0)
      if child is None:
        break
      child.widget().deleteLater()
      #del child
    query = QSqlQuery()
    query.prepare("SELECT id_faculty FROM faculty(:table);")
    query.bindValue(":table", self.selector.currentText())
    query.exec_()
    while query.next():
      check = QCheckBox(query.record().value(0))
      check.stateChanged.connect(self.updateView)
      self.box.addWidget(check)
    self.updateView()
 
  def updateView(self):
    fields = []
    for i in range(self.box.count()):
      w = self.box.itemAt(i).widget()
      if w.checkState() == Qt.Checked:
        fields.append(w.text())
    if len(fields)>0:
      #тут надо как-то через bindValue
      self.view.model().setQuery(
        "SELECT " +
        ", ".join(fields) +
        " FROM " + self.selector.currentText() +
        ";")
    else:
      self.view.model().clear()
 
 
app = QApplication(sys.argv)
window = Window()
window.show()
sys.exit(app.exec_())