What type of changes does the delta transformation calculate?

The delta transformation specifically calculates changes in the value of a measure over time. It focuses on quantifying the difference between the values captured at two different points in time, allowing for the analysis of trends, fluctuations, or growth within specific metrics. This is particularly useful in business intelligence and analytics, as it helps organizations understand how performance indicators evolve, enabling better decision-making and strategy development.

In contrast, the other options address different aspects of data handling. Changes in individual record counts refer to how many records exist in a dataset but do not reflect the changes in measure values. Changes in the structure of datasets pertain to modifications in the schema or format of the data but are not related to the actual measure values. Changes in data relationships involve how data points interact with one another, which is a different concept than the numerical changes over time that delta transformations focus on. By honing in on measure value changes, the delta transformation provides a critical tool for performance analysis.