Database, also called electronic database, any collection of data , or information, that is specially organized for rapid search and retrieval by a computer. Databases are structured to facilitate the storage, retrieval, modification, and deletion of data in conjunction with various data -processing operations. Learn database more and more; DBMS stands for database management system; in other words, a system that manages databases. Examples of DBMSes are Oracle and SQL Server. These are systems that can be used to manage transactional databases, such as HR systems, banking systems and so on. These are typically optimized for performing transactions. There are four structural types of database management systems: Hierarchical databases. Network databases. Relational databases. Object-oriented databases. To make this information more useful , easy to access and protected we use database management systems. DBMS is important because it manages the data effic