What isIngres

Ingres is an open source RDBMS that originated as a research project at Berkeley in the 1970’s. There are currently two versions of Ingres, the university Ingres which is open source and a commercial version called OpenIngres which uses SQL and QUEL for database operations. University Ingres is believed to be the first implementation of a relational database management system and was discontinued in 1985 after version 8.9 was released.

FAQs about Ingres

What is Ingres?

Ingres, written as INGRES, is a relational database management system (RDBMS) that was first developed as a research project at the University of California, Berkeley in the 1970s. It was one of the earliest RDBMS to be developed and is widely recognized as the first implementation of a relational database system.

What are the different versions of Ingres?

There are two strains of Ingres available today. The first is the university Ingres, also known as Berkeley Ingres. This is an open-source version of the database system, and it is available for anyone to use or modify. The second is OpenIngres, which is a commercial version of the database system. It uses SQL and some types of QUEL (Query Language) as its language for queries and database operations.

When was the last public release of University Ingres?

The last public release of University Ingres was version 8.9, and it was discontinued in 1985.

What Makes Ingres Unique?

Ingres has several features that make it unique compared to other RDBMS systems available today. These include:


One of the most significant advantages of Ingres is that it is an open-source RDBMS. This means that anyone can download, use, or modify the code for free. This makes it an attractive option for small businesses or individuals who need a powerful database system but do not have the budget to invest in a commercial database.

Relational Database System

Ingres is one of the earliest examples of a relational database management system. It uses a data model where tables, records, and columns are related to one another to create logical connections between pieces of data. This makes it easier to manage and query large sets of data.


Ingres is designed to be highly scalable, which means that it can handle large quantities of data without slowing down or crashing. It is also highly available and can be used in a variety of environments, including multi-user and distributed computing systems.


Ingres is a highly flexible database system that can be used in a variety of applications, from small businesses to large-scale enterprise systems. It can be customized to meet the specific needs of any business and can be integrated with other software and platforms.

The essence

Ingres is a powerful and flexible relational database management system that has been in development for over four decades. Its open-source nature, scalability, and flexibility make it an attractive option for businesses and developers looking for a powerful, customizable, and cost-effective database solution. Whether you are developing a small business application or a large-scale enterprise system, Ingres is an excellent choice for your data management needs.

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