MySQL is a freely available open source Relational Database Management System (RDBMS) that uses Structured Query Language (SQL). SQL is the most popular language for adding, accessing and managing content in a database. It is most noted for its quick processing, proven reliability, ease and flexibility of use. MySQL is an essential part of almost every open source PHP application. Good examples for PHP/MySQL-based scripts are php, ecommerce, and Joomla.
XML is a future of general-purpose markup language. It is classified as an extensible language because it allows its users to define their own elements. Its primary purpose is to facilitate the sharing of structured data across different information systems, particularly via the Internet and it is used both to encode documents and to serialize data.
.NET [3.0/ 2.0/ 1.1(C#, VB.NET, ASP.NET)
The .NET Framework is Microsoft's own application development platform that enables developers to easily create Windows applications, web applications, and web services using a myriad of different programming languages, and without having to worry about low-level details like memory management and processor-specific instructions.
MS SQL Server is a Relational database management system (RDBMS) that's designed for the enterprise environment. SQL Server runs on T-SQL (Transact -SQL, a set of programming extensions from Sybase and Microsoft that add several features to standard SQL, including transaction control, exception and error handling, row processing, and declared variables.
JAVA is world proven language to whom every companies follows. Java is a programming language specially designed for use in the distributed environment of the Internet. IT's totally platform independent & operating system independent.
Leading supplier of Data base managment software but it is well known for its sophisticated relational database products (notably Oracle9i), which are used in Fortune 1000 corporations and by many of the largest Web sites. Oracle's relational database was the world's first to support the Structured Query Language (SQL), now an industry standard.