The concept of electronic databases

Electronic databases, or what is also known as the database (DATABASE), which is a set of logical data elements linked to each other by mathematical relationships, so that the database consists of one or more tables as needed, and so that one table consists of one or more records. , And the record contains one or more fields

Examples of databases include: The record for a specific employee, so that this record consists of several fields or information about the employee, such as: the employee's number, name, rank, date of appointment, salary, and the section that follows him.

The information stored in the databases can be accessed using a database search engine, so that it facilitates the process of dealing with different data and facilitates the search for it, and it also helps in carrying out various operations on them, such as: adding and modifying them, and the main goal of databases is to focus on A method of organizing data, so that it is designed in a way that is free of problems and repetition by following a specific model for arranging this data.

The combination of databases
The electronic databases can be divided in terms of composition based on the mathematical relationships that link the data according to the following: Relational structure, and it is intended to adopt a specific relationship between the data elements that make up the databases so that the value of each element depends on the sum of two elements, and this method is considered one of the most successful methods The structures followed; Given that it is varied in the data.

Structural structure, so that the elements of evidence are arranged among themselves in the form of an organizational structure, such as if two elements are classified under one element or subordinate to it. Hierarchical structure, so that each element in the databases is responsible for only one element.

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