1. A system for analyzing fields, comprising: a processor; and storage coupled to the processor, wherein the storage stores a computer program, and wherein the processor executes the computer program to operations, the operations comprising: receiving statistical metrics for each field in a data set; generating a general interestingness index for each field using one or more combination functions that aggregate standardized interestingness sub-indexes; identifying one or more fields as interesting for further analysis using the general interestingness index; constructing one or more expert recommendations for field transformations for the identified one or more fields, wherein the expert recommendations for field transformations indicate how the identified one or more fields in the data set should be updated; and updating the identified one or more fields in the data set based on the field transformations.