DATETIMETIMESTAMP

DATETIMETIMESTAMP is a term used to describe a data type that stores a complete moment in time by combining date and time into a single value. In practice, it serves as a unified representation similar to existing types such as DATETIME, TIMESTAMP, or TIMESTAMP WITH TIME ZONE, but is sometimes used in documentation or in certain codebases to emphasize the integration of date and time components.

Key characteristics include the inclusion of year, month, day, hour, minute, second, and often fractional seconds. Many implementations support timezone information, either as an offset from UTC or as an explicit time zone. Precision can range from seconds to nanoseconds, depending on the database or language. Storage size and range vary by system, with some platforms offering broad support across a wide year span and others using fixed-width representations.

TIME ZONE awareness is a common consideration. A DATETIMETIMESTAMP may be stored in UTC and presented in a local time zone, or stored with an attached offset. Arithmetic operations (adding or subtracting intervals), comparisons, and ordering are typical features, as are formatting and parsing from ISO 8601 strings.

Interoperability is another important aspect. The ISO 8601 representation, such as 2025-12-07T14:30:15.123Z, is widely used for interchange in APIs, logs, and data exports. In databases, you will often encounter related types labeled as DATETIME, TIMESTAMP, or TIMESTAMP WITH TIME ZONE; DATETIMETIMESTAMP can be viewed as a conceptual unification of these concepts.

Common use cases include event logging, scheduling, data warehousing, and any application requiring precise, timezone-aware timestamps.