Вот код, который работает для ввода текстовых данных:
date = datetime.date(int(year.get()),int(month.get()), int(day.get()))
narratif=T.get("1.0","end-1c")
c.execute("""INSERT INTO Incidents
(Datestamp, Description, Place, Latitude, Longitude, Precision, Intimidation, Destruction, Burglary,
Carjacking, Theft, Assault, Sexualassault, Abduction, Homicide, Shooting, Explosive, Narrative)
VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)""", (date, description.get(),place.get(),latitude.get(), longitude.get(), precision.get(), intimidation1.get(),destruction2.get(), burglary3.get(), carjacking4.get(), theft5.get(), assault6.get(), sexualassault7.get(), abduction8.get(), homicide9.get(), shooting10.get(), explosive11.get(), narratif))