Editing Temporal database (section)

==Features==
Temporal databases support managing and accessing temporal data by providing one or more of the following features:<ref name="SQL2011"/><ref name="DB2"/>

* A time period datatype, including the ability to represent time periods with no end (infinity or forever)
* The ability to define valid and transaction time period attributes and bitemporal relations
* System-maintained transaction time
* Temporal [[primary keys]], including non-overlapping period constraints
* Temporal constraints, including non-overlapping uniqueness and [[referential integrity]]
* Update and deletion of temporal records with automatic splitting and coalescing of time periods
* Temporal queries at current time, time points in the past or future, or over durations
* Predicates for querying time periods, often based on [[Allen's interval algebra#Relations|Allen's interval relations]]