Database Management Basics

Database management is the method for managing information that supports the organization’s business processes. It involves storing data, distributing it to users and applications making changes as needed and monitoring the changes in the data and preventing it from being corrupted by unexpected failures. It is an integral part of the informational infrastructure of a company that aids in decision-making as well as corporate growth and compliance with laws such as the GDPR and the California Consumer 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 variety of purposes. From calculating inventory to aiding complex financial accounting functions as well as human resource functions.

A database is a set of tables that organizes data according to a specific pattern, such as one-to many relationships. It uses primary keys to identify records and permit cross-references between tables. Each table has a set of attributes or fields that represent facts about data entities. The most popular type of database that is currently in use is a relational model, designed by E. F. “Ted” Codd at IBM in the 1970s. This model is based on normalizing data to make it easier to use. It is also simpler to update data because it does not require the changing of certain sections of the database.

Most DBMSs can support multiple types of databases by offering different internal and external levels of organization. The internal level focuses on cost, scalability and other operational concerns like the layout of the database’s physical storage. The external level is the representation of the database on user interfaces and applications. It could include a mix of different external views (based on different data models) and may include virtual tables that are constructed from data that is generic to enhance performance.






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