database management system (DBMS) is a software system specifically designed to hold databases. We usually reserve the term database for an information repository maintained in a database management system.

Most database management systems are designed to store relational databases. A relational database maintains its information in the form of a collection of relations. A relation is usually called a database table. Each table has a set of named columns and a set of records (rows). Each row contains values for the columns.

This is used to record information as follows. The columns represent properties; the rows contain the values of these properties. For instance, we may have a table with information about persons, and columns with names such as first namelast name, and date of birth, and each row containing the first name, last name, date of birth, etcetera, of a particular person.



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