[[Object database]]s were invented in the 1980s to overcome the inconvenience of [[object-relational impedance mismatch]], which led to the coining of the term "post-relational" but also development of hybrid [[object-relational database]]s.
The next generation of post-relational databases in the 2000s became known as [[NoSQL]] databases, introducing fast [[key-value store]]s and [[document-oriented database]]s. A competing "next generation" known as [[NewSQL]] databases attempted new implementations that retained the relational/SQL model while aiming to match the high performance of NoSQL compared to commercially available relational DBMSs.
