How the automatic records and transactioms are maintaimed in a ecommercial site like amazon, flipkart, etc??

Question

please tell me the fundamental process of working of ecommercial sites and required things and skills to mantain its privacy.

Answer 1

You can create e-commerece site
via Wordpress.
But,
If you want to create yourself -
then - you need to learn
-
HTML, CSS, Javascript, Jquery (client-side)
and PHP or Python (server-sided)
and MySQL ( for data storage)

Answer 2

thankyou Rahman for your kind answer, but i expect a little more clear answer to understand the process of it.