Version 1.4
SELECT * FROM Corr_Reduce ( ON Corr_Map ( ON { table_name | view_name | (query) } PARTITION BY group_column [, group_column [,...]] [ TargetColumns ({ 'target_column' | target_column_range }[,...]) ] KeyName ('key_name') [ GroupByColumns ({ 'group_column' | 'group_column_range' }[,...]) ] ) PARTITION BY key_name [, group_column [,...]] );