لخّصلي

Database management systems are used to define the data and physical characteristics that make up the database, represented by the records and fields, the data type of each field, the permissible length, and its logical name, in addition to defining the relationships between the records that make up the database, whether in a hierarchical or network

manner.Thus, it can be said that database management systems are a group of software that provides the user with easy tools that enable him to deal th databases, such as adding, deleting, hiding, printing, searching, selecting, storing and updating data with the aim of assisting in planning and decision-making.It can be said that database management systems help achieve a set of goals affecting the main activities in the areas of automated data processing applications.

Database management systems are used to define the data and physical characteristics that make up the database, represented by the records and fields, the data type of each field, the permissible length, and its logical name, in addition to defining the relationships between the records that make up the database, whether in a hierarchical or network

manner.Thus, it can be said that database management systems are a group of software that provides the user with easy tools that enable him to deal th databases, such as adding, deleting, hiding, printing, searching, selecting, storing and updating data with the aim of assisting in planning and decision-making.

A comparison must be made between a database, which consists of a group of files linked together, and a database management system, which represents a set of software that efficiently manages a group of interconnected data.

It can be said that database management systems help achieve a set of goals affecting the main activities in the areas of automated data processing applications. Certain systems are required to organize and manage stored data, which is called Data Base Management System In light of the above, database management systems management systems can be defined as: "a set of ready-made programs that implement all the functions required by the database." For example, after adding new customers to the telephone directory in Cairo, you may need to rearrange the subscribers names alphabetically or to arrange their addresses. Such work is called a database system.

A database system is defined as "an organized collection of data records and programs with the least possible amor redundancy and the greatest possible degree of integration, while allowing due to be shared by various users without the slightest cone betwers the data and application programs."