Abstract: A data tracking apparatus, method, and non-transitory tangible machine-readable medium thereof are provided. The data tracking apparatus includes a storage device, a display screen, and a processor. The storage device stores a fact dataset, wherein the fact dataset is continuously updated by a stream of data. The display screen displays a user interface, wherein the user interface comprises a plurality of options related to the fact dataset. The processor establishes a tracking rule in response to one of the options being selected and updates the user interface so that the user interface further includes a tracking item corresponding to the tracking rule. The processor derives a tracking result by querying the updated fact dataset according to the tracking rule in response to the tracking item being selected.

Abstract: A data tracking apparatus, method, and non-transitory computer readable storage medium thereof are provided. The data tracking apparatus receives a stream of data continuously and stores a fact dataset, wherein the fact dataset is updated by the stream of data continuously. The fact dataset includes a plurality of fact records, wherein each of the fact records includes an identity value. The data tracking apparatus locates a tracking target by querying the fact dataset corresponding to a first time instant according to a first query command, wherein the tracking target includes a subset of the identity values. The data tracking apparatus derives a tracked dataset by querying the fact dataset corresponding to a second time instant according to the tracking target and a second query command.