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Best Relational Database Management Systems 2026

A relational database management system (RDBMS) is a program that lets you create, update and administer a relational database that stores data in the form of related tables. Although there are many different types of database management systems, relational databases are still the most common. Other types of databases include hierarchical databases and network databases. Most commercial relational databases use SQL (Structured Query Language) to access data from the database. The most popular ...

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What is Relational Database Management System Software?

A relational database presents information in tables with rows and columns. A table is referred to as a relation in the sense that each row contains data that is related to a single entity , while each column represents different keys or concepts. When each row in a table is different, it is possible to use one or more columns to identify a particular row. There is always a “primary key” which serves as the unique identifier for each entity or record. For example, in the case of a table of company employees, the primary key might be employee number.

Data is retrieved from the table using a specialized language called Structured Query Language or SQL. SQL allows users to query the data using SELECT statements and WHERE clauses. A group of SQL statements can be called as a mini-program or executable which is called a stored procedure.

SQL is a widely understood language with a deep bench of practitioners in the marketplace. For this reason, tools using SQL are being developed to query non-relational big data stores like Hadoop, which use less well known, and harder to use, interfaces to retrieve data.

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