update

app_6/s.py

@@ -12,11 +12,28 @@ app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
 db.init_app(app)
 
 def main():
-    flights = Flight.query.all()
+    # flights = Flight.query.all()
+    # flights = Flight.query.order_by(Flight.origin.desc()).all()
+    flights = Flight.query.filter(Flight.origin.like("%a%")).all()
     print(flights)
     for flight in flights:
         print(f"{flight.origin} -> {flight.destination} : {flight.duration}")
+    # select Ü from flights where origin = 'Paris' Limit 1;
+    print(Flight.query.filter_by(origin="Paris").first())
+    # select count(*) from flights where origin = 'Paris';
+    print(Flight.query.filter_by(origin="Paris").count())
+    # select * from flights wehere id = 1;
+    print(Flight.query.get(1))
 
+    # update the entry
+    flight = Flight.query.get(1) 
+    flight.duration = 280
+
+    """
+    # delete from flights where id = 28; 
+    flight = Flight.query.get(28)
+    db.session.delete(flights)
+    """
 if __name__ == "__main__":
     # allow us to use command line to interacte with the flask applicaton
     with app.app_context():