20. The storage medium according to claim 19 wherein the instructions, when executed by data processing apparatus, cause the data processing apparatus to perform further operations comprising: applying at least one of the identified predictive models to the database table to obtain one or more predicted values; and adding the one or more predicted values to the database table.
20. The storage medium according to claim 19 wherein the instructions, when executed by data processing apparatus, cause the data processing apparatus to perform further operations comprising: applying at least one of the identified predictive models to the database table to obtain one or more predicted values; and adding the one or more predicted values to the database table. 33. The storage medium according to claim 20 , wherein the one or more categories related to categories specified by the different tags are in a same category hierarchy as the categories specified by the different tags.