As soon as the customer punches his credit card details on the secured page of the merchant's virtual shopping mall , it is authenticated by the issuing bank and then accepted by the acquiring bank , now the customer is entitled for the delivery of the selected item. Once the proof of delivery is presented to the acquiring bank the amount is transferred into the merchant's account. Security can be taken care of while designing the web site or hosting. The difference lies in the application of the two. Oracle is used when the database is huge and complex ,it is costlier than SQL .
Source code is the term used in web site designing and development.
In programming a developer writes codes for different components of the web site, this code exists with the developer and should be transferred to the owner of the site after completion of the work. Yes you can get them as you have paid for it. How much avg. There is no avg. Static web site is the site which communicates one way like putting up information about your company , your product details, your infrastructure details etc Dynamic web site is the site which takes care of two way communication between the potential or existing client and the site owner , it can be a discussion thru the discussion forum, chat or any other communication component on the web site.