viernes , 2 de junio de 2023

Database Management Basics

Database management is a system of managing the information that supports a business’s operations. It involves storing and distributing data it to applications and users and editing it when needed and monitoring changes to the data and making sure that data integrity is not compromised due to unexpected failure. It is an integral part of the overall infrastructure of a business which supports decision-making as well as corporate growth and compliance with laws like the GDPR and the California Consumer Privacy Act.

In the 1960s, Charles Bachman and IBM along with other companies developed the first database systems. They developed into information management systems (IMS) which allowed massive amounts of data to be stored and retrieved for a range of reasons. From calculating inventory, to aiding complicated financial accounting functions, and human resource functions.

A database consists of tables that organize data in accordance with a specific arrangement, like one-to-many relationships. It utilizes primary key to identify records and allow cross-references among tables. Each table contains a set of fields, referred to as attributes, which provide information about data entities. The most widely used type of database currently is a relational model, designed by E. F. “Ted” Codd at IBM in the 1970s. This model is based upon normalizing the data, making it simpler to use. It is also easier to update data since it does not require changing various databases.

Most DBMSs can accommodate multiple types of databases through different levels of internal and external organization. The internal level focuses on costs, scalability, and other operational issues, such as the layout of the database’s physical storage. The external level is the way the database is displayed in user interfaces and other applications. It can include a combination of different external views (based on the various data models) and may also include virtual tables that are created using generic data to improve performance.

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