Database Management Basics

Database management is a method of managing the information that is used to support a company’s business operations. It includes data storage and distribution to applications and users and modifying it as needed and monitoring the changes in the data and preventing it from getting corrupted due to unexpected failures. It is an integral part of the overall informational infrastructure of a company which supports decision-making in corporate growth, as well as compliance with laws like the GDPR and California Consumer Privacy Act.

The first database systems were invented in the 1960s by Charles Bachman, IBM and others. They evolved into information management systems (IMS), which allowed huge amounts of data to be stored and retrieved for a range of reasons. From calculating inventory to supporting complex financial accounting functions and human resource functions.

A database is a collection of tables that organizes data according to a specific pattern, such as one-to-many relationships. It uses primary keys to identify records, and allow cross-references between tables. Each table contains a set of fields called attributes that contain information about data entities. Relational models, created by E. F. “Ted” Codd in the 1970s at IBM and IBM, are the most well-known database type currently. This design is based on normalizing data to make it simpler to use. It is also simpler to update data since it doesn’t require changing several databases.

Most DBMSs support multiple types of databases by offering different internal and external levels of 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 in user interfaces and applications. It could include a mix of different external views (based on the different data models) and may include virtual tables which are generated from generic data in order to improve performance.

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