Are there any commercial database management systems (DBMS) supporting Temporal Database Applications?

Commercial DBMS such as Oracle, Sybase, Informix etc are non-temporal DBMS. They may support data types to store data such as events (June 12, 1998), however they provide neither a temporal query language, nor a temporal data definition language, nor a temporal manipulation language nor temporal constraints.

TimeDB is a product which supports the management of temporal data with a temporal query language, a temporal data definition language, a temporal manipulation language and temporal constraints.

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