【单选题】Assuming that the data set Company.USA has five or more observations, what is the result of submitting the following program? data work.getobs5(drop=obsnum); obsnum=5; set company.usa(keep=manager pay...
【单选题】A data warehouse is a subject-oriented data set used for reporting and analusis. Data warehouses can be subdivided into ( ). Which store subsets of data from a warehouse.