Database Management Basics

Database management is a system of managing information that is used to support a company’s business operations. It involves storing data, distributing it to application programs and users, modifying it as necessary and monitoring changes to the data and preventing it from being corrupted due to unexpected failure. It is one component of a company’s total informational infrastructure which aids in decision making and growth for the business as well as 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 large amounts of data to be stored and retrieved for a variety of purposes. From calculating inventory, to supporting complicated financial accounting functions, and human resource functions.

A database is a collection of tables that organizes data according to a specific pattern, such as one-to-many relationships. It makes use of primary keys to identify records and permits cross-references between tables. Each table is comprised of a set of fields called attributes that provide information about data entities. Relational models, developed by E. F. “TedCodd Codd in the 1970s at IBM and IBM, are among the most used database type currently. This model is based on normalizing data to make it simpler to use. It is also easier to update data since it doesn’t require the modification of certain sections of the database.

The majority of DBMSs are able to support multiple database types by providing different levels of external and internal organization. The internal level is concerned with cost, scalability, as well as other operational issues, like the physical layout of the database. The external level is the way the database is displayed in user interfaces and other applications. It could include a mix of various external views based on different data models. It may also include virtual tables that are computed using generic data to improve the performance.

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