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You do not have a physical time table in your database but would like to use the time series functions that OBIEE offers. What two options do you have?
Correct Answer: A,D
Explanation/Reference: Modeling Time Series Function in OBIEE Modeling Time Series Data Time series functions provide the ability to compare business performance with previous time periods, allowing you to analyze data that spans multiple time periods. For example, time series functions enable comparisons between current sales and sales a year ago, a month ago, and so on. Because SQL does not provide a direct way to make time comparisons, you must model time series data in the Oracle BI repository. First, set up time dimensions based on the period table in your data warehouse. Then, you can define measures that take advantage of this time dimension to use the AGO, TODATE, and PERIODROLLING functions.