Relational Databases serve as the software embodiment of the principles outlined in the Relational Model. These databases organize and store data in tables, each with its own set of columns designed to store specific data types, such as strings or numbers. The combination of a table and its column specifications is known as a schema. Additionally, tables can apply constraints to ensure the integrity of the data they contain.
One of the defining features of relational databases is the ability to establish relationships between tables using foreign keys. This allows for seamless connectivity and enhanced data management. To implement and interact with these databases, a Database Management System (DBMS) acts as the intermediary software. SQL, or Structured Query Language, is commonly used to create databases, define schemas, populate tables with data, and retrieve information as needed.
Several popular solutions exist for implementing relational databases, including PostgreSQL, MySQL, SQLite, Oracle, and Microsoft SQL Server. Each of these systems provides a robust environment for managing structured data.
Tags: Relational Databases, SQL, Database Management System, Schema, Foreign Keys