Databases come in various forms to cater to different data storage needs. The three main types of databases are relational databases, NoSQL databases, and object-oriented databases. Relational databases use tables to store data with predefined relationships between them, while NoSQL databases allow for more flexible and scalable data storage. Object-oriented databases store data as objects, making them well-suited for complex data structures.
A database is made up of several key components, including Shop tables, fields, records, and keys. Tables are used to organize data into rows and columns, with each column representing a different field. Records, also known as rows, contain a complete set of information, while keys are used to uniquely identify each record within a table.
Database Management Systems (DBMS)
A Database Management System (DBMS) is software that allows users to interact with a database. Popular examples of DBMS include MySQL, Oracle, and Microsoft SQL Server. DBMS performs various functions, such as data storage, retrieval, and manipulation, ensuring data consistency and security.
Designing a Database
Designing a database involves careful planning, creating a data model, and normalization process. During the planning stage, the database requirements are defined, leading to the creation of a data model that outlines the structure of the database. Normalization is the process of organizing data to minimize redundancy and dependency, enhancing data integrity.