Database Management Basics

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

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The first database systems were created in the 1960s by Charles Bachman, IBM and others. They developed into information management systems (IMS) which made it possible to store and retrieve huge amounts of information for a range of purposes, from calculating inventory to supporting complicated human resources and financial accounting functions.

A database is a set of tables which organize data in accordance with a certain scheme, like one-to many relationships. It uses primary key to identify records and allow cross-references among tables. Each table has a set of fields, referred to as attributes, that provide information about 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. This model is based on normalizing the data, making it easier to use. It also makes it easier to update data without the necessity of changing various databases.

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