Database Management Basics

Database management is a method for managing the data that supports a company’s business operations. It involves storing data and distribution to users and application programs, modifying it as necessary and monitoring changes to the data and preventing it from getting corrupted due to unexpected failure. It is an element of a company’s informational infrastructure that aids in decision-making and growth of the company as well as compliance with laws like the GDPR and the California Consumer Privacy Act.

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

A database is a set of tables which organize data in accordance with an established pattern, such as one-to-many relationships. It uses primary key to identify records and allow cross-references among tables. Each table has a variety of fields, also known as attributes, that represent facts about the data entities. Relational models, which were developed by E. F. “TedCodd Codd in the 1970s at IBM and IBM, are the most used database type currently. The concept is based on normalizing data to make it easier to use. It is also simpler to update data since it does not require changing various databases.

The majority of DBMSs support a variety of databases and offer different internal and external levels of organization. The internal level is focused on costs, scalability and other operational issues, like the physical layout of the database. The external level focuses on how the database appears in user interfaces and other applications. It could comprise a combination of different external views (based on the different data models) and can also include virtual tables which are generated from data that is generic to enhance performance.

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