Database Management Basics

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Database management is a system of managing information that supports a company’s business operations. It involves storing data, disseminating it to users and applications making edits as needed and monitoring changes to the data and stopping data corruption due unexpected failure. It is part of the overall informational infrastructure of a company which supports decision-making in corporate growth, as well as compliance with laws like the GDPR and California Consumer katharon.gr Privacy Act.

The first database systems were invented in the 1960s by Charles Bachman, IBM and others. They developed into information management systems (IMS) which allowed huge amounts of data to be stored and retrieved for a range of purposes. From calculating inventory, to supporting complex financial accounting functions as well as human resource functions.

A database is a set of tables that organize data according to a certain arrangement, like one-to-many relationships. It uses primary keys to identify records, and allow cross-references between tables. Each table contains a set of attributes or fields that contain information about data entities. Relational models, created by E. F. “TedCodd Codd in the 1970s at IBM, are the most popular database type today. This model is based on normalizing data to make it more user-friendly. It also makes it easier to update data, avoiding the necessity of changing different sections of the database.

Most DBMSs support multiple types of databases by providing different internal and external levels of organization. The internal level deals with the cost, scalability, and other operational issues, including the physical layout of the database. The external level is the representation of the database on user interfaces and applications. It may include a mix of different external views that are based on different data models. It may also include virtual tables that are calculated using generic data to enhance the performance.

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