OpenCV Python program for Vehicle detection in a Video frame

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If a vehicle is detected in this source, I want to put the vehicle detected data in the database. How can I do it?

import cv2

cap = cv2.VideoCapture(0) 
car_cascade = cv2.CascadeClassifier('cars.xml')
while True: 
# reads frames from a video 
ret, frames = cap.read() 

# convert to gray scale of each frames 
gray = cv2.cvtColor(frames, cv2.COLOR_BGR2GRAY) 


# Detects cars of different sizes in the input image 
cars = car_cascade.detectMultiScale(gray, 1.1, 1) 

# To draw a rectangle in each cars 
for (x,y,w,h) in cars: 
    cv2.rectangle(frames,(x,y),(x+w,y+h),(0,0,255),2) 

# Display frames in a window  
 cv2.imshow('video2', frames) 

# Wait for Esc key to stop 
if cv2.waitKey(33) == 27: 
    break
cv2.destroyAllWindows()

Source is here https://www.geeksforgeeks.org/opencv-...