If not specified in a query, which data version is returned by default?

When executing queries in the AVEVA Historian Server, if no specific version of data is indicated, the system defaults to returning the latest version. This behavior is designed to provide users with the most up-to-date information available in the historian database, which is often critical for real-time monitoring and analysis tasks.

The rationale behind this default behavior is that in many applications, users are primarily interested in the most recent data to make informed decisions. By returning the latest version automatically, it reduces the need for query modifications for common use cases.

In scenarios where historical comparisons or a different version of data is required, users can specifically request older versions or other data parameters in their queries. The other options, such as Original, Previous, and Specific, refer to alternative data retrieval requests that would need to be explicitly defined by the user for the query to return those particular data versions. This ensures flexibility in data retrieval while keeping the process straightforward for users seeking current information.