Database management is the process for managing data that supports the company’s business operations. It involves storing data, distributing it to applications and users, modifying it as necessary, monitoring changes in the data and preventing it from being damaged by unexpected failures. It is an element of a company’s overall informational infrastructure that aids in decision-making and corporate growth, 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 evolved into the information management systems (IMS) which allowed the storage and retrieve massive amounts of data for a wide range of applications, from the calculation of inventory to supporting complicated financial accounting and human resources functions.
A database is a collection of tables that organizes data according to a certain scheme, like one-to many relationships. It makes use of primary keys to identify records and allow cross-references between tables. Each table has a set of fields, also known as attributes, that represent facts about the data entities. Relational models, which were developed by E. F. “TedCodd Codd in the 1970s at IBM and IBM, are the most widely used type of database currently. This model is based upon normalizing the data, making it more easy to use. It also makes it simpler to update data without the need deltatrack.fr to change many sections of the database.
Most DBMSs can support various types of databases, 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 representation of the database on user interfaces and applications. It could include a mix of various external views based on different data models. It can include virtual tables that are computed using generic data in order to improve the performance.