If your web site needs to update large quantities of information via the web, you will need a database to store your information.
There are many different database systems available for web hosting. The most common are MySQL, SQL Server, Oracle, and MS Access.
Using the SQL Language
SQL is the language for accessing databases.
If you want your web site to be able to store and retrieve data from a database, your web server should have access to a database-system that uses the SQL language.
SQL Server
Microsoft's SQL Server is a popular database software for database-driven web sites with high traffic.
SQL Server is a very powerful, robust and full featured SQL database system.