1. It is - and that's why I chose that example (a less controversial one) here. And though ELT is a very common standard now - I don't know of a single book th

1. It is - and that's why I chose that example (a less controversial one) here. And though ELT is a very common standard now - I don't know of a single book that recommends it or explains why that change has happened. Just one of the reasons for writing a new data book. 2. C-Store does largely solve pervious performance and cost issues with denormalization. We also write a bit in this book (more to come) on how to avoid doing all that copying.