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When a Track Trend job is created, the job creates a new table to save the results of the report. Each time the report runs, it saves the data to the table, with an additional date-time column recording when the trend job ran.
Previously, this column was called "Date." In order to better clarify its purpose, new trend jobs will name the column "As Of" instead. (Jobs created before this feature was implemented will still use the column "Date.")
For example, in the following report, the column "As Of" indicates that the data in Assignment Group and Average Duration were captured as of October 13th: