1. A method in a system of a host organization, the system having at least a processor and a memory therein, wherein the method comprises: generating indices from a dataset of columns and rows, the indices representing probabilistic relationships between the rows and the columns of the dataset; storing the indices within a database system of the host organization; exposing the database system of the host organization via a request interface; receiving, at the request interface, a query for the database system specifying a GROUP command term and a specified column as a parameter for the GROUP command term; querying the database system using the GROUP command term and passing the specified column to generate a predictive record set; returning the predictive record set responsive to the query, the predictive record set having a plurality of groups specified therein, each returned group of the returned groups of the predictive record set including a group of one or more rows of the dataset; and wherein a confidence indicator returned with each respective row of the one or more rows specified within each group of the plurality of groups returned with the predictive record set ranges from a minimum of 0 indicating a lowest possible confidence in a result that the respective row belongs to the group specified to a maximum of 1 indicating a highest possible confidence in the result that the respective row belongs to the group specified.