Data Profiling What, Why and How? eBook
Data Profiling is a systematic analysis of the content of a data source (Ralph Kimball).
You must look at the data; you can’t trust copybooks, data models, or source system experts.
It is “systematic” in the sense that it’s thorough and looks in all the “nooks and crannies” of
the data. You have to know your data before you can fix it.