Ingres Database ( /ɪŋˈɡrɛs/ ing-gress) is a commercially supported, open-source SQL relational database management systemintended to support large commercial and government applications. Ingres Database is fully open source with a growing[citation needed]global community of contributors. However, Actian Corporation controls the development of Ingres and makes certified binaries available for download, as well as providing worldwide support.
Ingres was first created as a research project at the University of California, Berkeley, starting in the early 1970s and ending in the early 1980s. The original code, like that from other projects at Berkeley, was available at minimal cost under a version of the BSD license. Since the mid-1980s, Ingres has spawned a number of commercial database applications, including Sybase, Microsoft SQL Server,NonStop SQL and a number of others. Postgres (Post Ingres), a project which started in the mid-1980s, later evolved into PostgreSQL.
Ingres is ACID and is fully transactional (including all DDL statements).