15. The system of claim 14 , wherein identifying the plurality of predictive models further comprises identifying a second predictive model from the collection of predictive models, the second predictive model being configured to receive, as an input, both data in a category specified by at least one of the different tags and data in a category specified by the second tag; and adding a name associated with the second predictive model to the set of names of predictive models that are compatible with the database table.
16. The system of claim 15 , wherein the one or more computing devices are further configured to perform operations including: applying the first predictive model to the database table to obtain a first predicted value; adding the first predicted value to the database table in a new column to obtain an updated database table; subsequently applying the second predictive model to the updated database table to obtain a second predicted value; and adding the second predicted value to the updated database table.