A database is an organized collection of information that enables a computer program to access desired data quickly. In other words, the information is organized in such a manner that it can be easily accessed, managed and updated.
Databases can be compared to electronic filing systems, organized by records, fields, and files. Each field contains a single piece of information; each record consists of a complete set of fields, and each file contains a collection of records.
Cloud databases are databases that have been optimized or developed for virtualized environments. Cloud databases provide benefits such as the ability to pay for storage capacity and bandwidth on a per-use basis, and they provide scalability on demand, along with high availability