Delta tables are constructed from data found on the Snapshot tables. Additionally, each Delta table has a set of identifying columns that are added to the front of each row to identify the source of the Delta data, such as MUF, time period, and so on.
The DELTA database contains one detail table that corresponds to the tables in the Snapshot database. The DELTA database also contains two ratio tables (the BVM and the BVD) that are used to summarize the key data statistics found in the Delta rowsets and present the statistics as a set of ratios.
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