In computing, a database is an organized collection of data stored and accessed electronically. Small databases can be stored on a file system, while large databases are hosted on computer clusters or cloud storage.The design of databases spans formal techniques and practical considerations including data modeling, efficient data representation and storage, query …

Database normalization is the process of structuring a relational database in accordance with a series of so-called normal forms in order to reduce data redundancy and improve data integrity.It was first proposed by Edgar F. Codd as part of his relational model.. Normalization entails organizing the columns (attributes) and tables (relations) of a database to ensure that their …

In a database, an entity type is the equivalent of a table; each individual record is represented as a row and an attribute as a column. Entity types are related to each other using 1: N mapping, also known as one-to-many relationships. The most recognized and used hierarchical databases are IMS developed by IBM and Windows Registry by Microsoft