The first step in preparing data for mining is the creation of a case table. If all the data resides in a single table and all the information for each case (record) is included in a single row (single-record case), this process is already taken care of. If the data resides in several tables, creating the data source involves the creation of a view. For the sake of simplicity, the term "case table" is used here to refer to either a table or a view.
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