A database is a structured set of data. So, a computer database is a structured set of computable data. A database can be anything from a simple shopping list to a picture gallery or the vast amount of information in a corporate network. To add, access, and process data stored in a computer database, you need a database management system such as MySQL Server. These systems allow users to create, update, and extract information from their databases. Unlike a spreadsheet, a database is a collection of tables that can contain large amounts of data and allow for complex queries to extract desired information.