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 ************************************************************************************           What are AJX, XML and JSON? A.XML – (eXtensible Markup Language) is one of the most common formats used to share information between different platforms. Owing to its simplicity and readability, it has become the de-facto standard for data sharing. In addition, XML is easily extendable. B.JSON – ( JavaScript Object Notation ) J SON  is a lightweight format for storing and transporting data.  JSON  is often used when data is sent from a server to a web page.  JSON  is "self-describing" and easy to understand. C.AJAX – Asynchronous JavaScript And XML.  AJAX  is not a programming language.  AJAX  just uses a combination of: A browser built-in XMLHttpRequest object (to request data from a web server) JavaScript and HTML DOM (to display or use the data)
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 ********************************************************************************** WHAT IS SQL? S QL stands for Structured Query Language   is the standard means of manipulating and querying data in relational databases, though with proprietary extensions among the products.