Database Management Basics

Database management is the process for managing data that supports an organization’s business operations. It includes data storage and distribution to users and application programs making changes as needed and monitoring the changes in the data and preventing it from getting corrupted by unexpected failure. It is a part of the overall informational infrastructure of a company that supports 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 developed in the 1960s by Charles Bachman, IBM and others. They evolved 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 complex financial accounting functions as well as human resource functions.

A database is tables that organize data in accordance with a specific arrangement, like one-to-many relationships. It uses primary key to identify records and allow cross-references between tables. Each table contains a number of fields, referred to as attributes, which provide information about the data entities. The most well-known type of database today is a relational model developed by E. F. “Ted” Codd at IBM in the 1970s. The concept is based on normalizing data to make it easier to use. It is also simpler to update data since it doesn’t require changing many sections of the databases.

Most DBMSs can support multiple types of databases, offering internal and external levels of organization liendat.com.vn. The internal level is concerned with the cost, scalability, and other operational issues, such as the physical layout of the database. The external level is the representation of the database on user interfaces and applications. It may include a mix of various external views (based on the different data models) and can also include virtual tables that are computed using generic data to improve performance.