If we are talking about the databases for website, then major databases are MySQL, MSSQL and MS-Access.
Databases is a collection of datas. It types are Oracle Query Language ( SQL & MY SQL ) Microsoft Access
There are different types of databases according to everyone's usage. According to me there are following types of databases: 1. Hierarchical Database 2. Network Database 3. Relational Database 4. Object Oriented Relational Database (OORDBMS)
http://www.theukwebdesigncompany.com/articles/types-of-databases.php http://en.wikipedia.org/wiki/Database http://en.wikipedia.org/wiki/Category:Types_of_databases These three links can help you more.
There are different types of database such as Oracle, SQL, Sybase, MS Access, DB2, MYSQL but you must have to be updated with all their latest versions.