Database Management Basics

Database management is a system for managing the data that supports a company’s business operations. It involves storing data, distributing it to application programs and users and then modifying it if necessary, monitoring changes in the data and preventing it from being corrupted by unexpected failure. It is an element of a company’s overall informational infrastructure that aids in decision-making, corporate growth and compliance with laws such as the GDPR and the California Consumer Privacy Act.

In the 1960s, Charles Bachman and IBM among others came up with the first database systems. They developed 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 as well as human resource functions.

A database is tables that store data according to some arrangement, like one-to-many relationships. It uses the primary key to identify records and allows cross-references among tables. Each table has a variety of fields, referred to as attributes, which provide information about the entities that comprise the data. Relational models, which were developed by E. F. “TedCodd Codd in the 1970s at IBM, are the most well-known database type currently. This design is based on normalizing the data, making it more easy to use. It is also simpler to update data since it doesn’t require changing various databases.

Most DBMSs are able to support different types of databases by offering different internal and external levels of organization. The internal level addresses costs, scalability, and other operational concerns, such as the design of the database’s physical storage. The external level is the way the database appears in user interfaces and other applications. It can include a combination of different external views (based on different data models) and can also include virtual tables that are computed from generic data in order to improve performance.

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