Relational Databases

Top Rated Relational Databases Products

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Relational Databases Overview

What is Relational Database Software?

A relational database is nothing more than a data repository that stores information in structured tables with rows and columns. Because data is stored in a structured way, it can be retrieved using a query language that understands the table structure.

Relational Database Features & Capabilities

  • ACID (Atomicity, Consistency, Isolation, Durability) compliance ensuring database transactions are processed reliably

  • Referential integrity ensures that relationships between tables remain consistent

  • Fine-grained locking or synchronization mechanisms for managing simultaneous access of the same data by multiple users

  • Support for Unicode for multilingual capability

  • Ability to run database seamlessly on multiple platforms

  • Ability to recover data in the event of a failure

How it works

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.

The SQL Query Language

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.

Pricing Information

There are several robust free relational databases on the market like MySQL and PostgreSQL. Traditional highly-robust and fully-featured enterprise relational databases like Oracle start at about $45,000 for a single license for two processing cores. However, significant discounts are usually available.

Relational Databases Products

(51-60 of 60) Sorted by Most Reviews


CockroachDB is a distributed SQL database from Cockroach Labs in New York. It is designed to give users resilient, horizontal scale across multiple clouds with always-on availability and data partitioned by location. CockroachDB scales horizontally without reconfiguration or need…

Amazon RDS on VMware

Amazon RDS on VMware allows users to deploy Amazon RDS managed databases in on-premises VMware environments.

Percona Distribution for PostgreSQL

Percona Distribution for PostgreSQL provides an enterprise-grade, open source installation of PostgreSQL Core Distribution, plus critical additional enterprise components. PostgreSQL Core Distribution is an ACID-compliant relational database management system, supporting a wide range…


ClickHouse is an open-source column-oriented database management system developed at Yandex, that manages large volumes of data, including non-aggregated data, and allows generating custom data reports in real time. The system is linearly scalable and can be scaled up to store and…



Starting Price $210

CrateDB is an open-source, distributed SQL database for relational and time-series data, from headquartered in San Francisco. A solution for machine data, the vendor states CrateDB is purpose-built for the need to scale volume, variety and velocity of data while running…

Huawei Cloud GaussDB SQL


Starting Price $2,586.04

GaussDB(for MySQL) is a next generation MySQL-compatible, enterprise-class distributed database service. It uses a decoupled compute and storage architecture and data functions virtualization (DFV) storage that auto-scales up to 128 TB per DB instance. The vendor states there is…

Huawei Cloud Relational Database Services (RDS)

Huawei Cloud Relational Database Services (RDS) is a cloud database service which enables users to create a MySQL database. RDS is available for MySQL, PosgreSQL, and Microsoft SQL Server. RDS for MySQL facilitates software and hardware deployment and helps the user manage databases,…


dBase is a one of the oldest database management systems.

Empress RDBMS

Empress RDBMS is a relational database software solution offered by Empress Software.


HanDbase is a relational database software solution offered by DDH Software.

Frequently Asked Questions

What is the difference between a relational and non-relational database?

Relational databases use SQL and have a defined structure in the form of rows, columns, and keys. In contrast, a non-relational database uses some other storage model for the data. The result is that while relational databases have a high level of data integrity due to the structured nature of the database, non-relational databases are more easily scalable.

Do you need to know SQL to use a relational database?

Many relational databases include tools for creating and interacting with databases without writing SQL queries by hand. Despite this, a knowledge of SQL is necessary to take advantage of all the features of relational databases, such as advanced joins.

Are there free or open source relational database options?

There are many open source relational databases that are fully featured and popular. These database options are great choices for businesses that don’t have significant support needs, as open source options tend not to provide support, unless it is available as a separate, paid service.

Check out the best free database software!