What are Database and Transaction
• Database is a collection of data items related to some enterprise.
• For example, the depositor account information in a bank. A database might be stored on cards in a Rolodex or on paper in a file cabinet, but we are particularly interested in databases stored as bits and bytes in a computer. Such a database
can be centralized on one computer or distributed over several, perhaps widely
separated geographically. • To make access to data convenient, databases are generally encapsulated within a
database management system (DBMS).