Database management is a system of managing information that supports a company’s business operations. It involves storing data, distributing it to applications and users, editing it as needed and monitoring changes to the data and protecting against data corruption due to unexpected failure. It is an integral part of the informational infrastructure of a company that aids in decision-making, corporate growth, and compliance with laws like the GDPR and California Consumer Privacy Act.
The first database systems were developed in the 1960s by Charles Bachman, IBM and others. They evolved into the information management systems (IMS) which allowed the storage and retrieve massive amounts of data for a wide range of purposes, ranging from calculating inventory to supporting complex human resources and financial accounting functions.
A database is a set of tables that are organized according to a certain arrangement, like one-to-many relationships. syrizadytikisathinas.gr It uses primary key to identify records and allows cross-references among tables. Each table has a set of fields, referred to as attributes, which provide information about data entities. Relational models, which were developed by E. F. “TedCodd Codd in the 1970s at IBM and IBM, are among the most used database type today. This model is based on normalizing data to make it simpler to use. It also makes it easier to update data, avoiding the need to change several databases.
The majority of DBMSs support a variety of databases and offer different internal and external levels of organization. The internal level focuses on cost, scalability and other operational issues, 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 could include a mix of different external views based on different models of data and may include virtual table that are calculated using generic data in order to improve the performance.