16 May Database Management Basics
Database management is a system for managing data that supports the digiskills.shop company’s business operations. It involves storing and distributing data it to users and applications making edits as needed, monitoring data changes, and preventing data corruption due to unexpected failure. It’s a component of a company’s overall informational infrastructure, which supports decision-making, corporate growth and compliance with laws like the GDPR and the California Consumer Privacy Act.
The first database systems were developed in the 1960s by Charles Bachman, IBM and others. They evolved into information management systems (IMS), which allowed large amounts data to be stored and retrieved for a variety of purposes. From calculating inventory, to aiding complex financial accounting functions and human resource functions.
A database consists of a set of tables that store data according to some arrangement, like one-to-many relationships. It makes use of primary keys to identify records, and allow cross-references between tables. Each table is comprised of a variety of fields, also known as attributes, that provide information about the entities that comprise the data. Relational models, developed by E. F. “TedCodd Codd in the 1970s at IBM, are the most used database type in the present. This model is based on normalizing the data, making it simpler to use. It also makes it easier to update data without the necessity of changing many sections of the database.
The majority of DBMSs support a variety of databases by providing different internal and external levels of organization. The internal level addresses cost, scalability and other operational concerns such as the layout of the physical storage. The external level is the representation of the database on user interfaces and applications. It may include a mix of different external views that are based on different data models. It may include virtual table that are calculated using generic data to improve the performance.