SQL server is a full-featured relational database. As such it stores information in tables and uses various methods to insert, update, delete and select data. UNlike Accesss, it does not have a way to develop the user interface, so you must use some other program for that such as VB, C++ , VB.Net, C#, etc.
It is used for an of the things databases are typically used for: purchasing systems, accounting systems, help desk systems, back end for web sites, Any kind of business information system you would want. oOu can often buy packaged systems which use SQL Server as their backend or you can develop the database and front end yourself to your company's specific needs.
SQL Server is a Microsoft product and can only run on servers running a MIcrosoft operating system.
Questions about posting. See faq183-874