When to Denormalize a Database Design

Question

I know that normalization has been extensively discussed on Stack Overflow. I\'ve read many of the previous discussions. I\'ve got some additional questions though.

I

Answer 1

1) Does not require denormalization. You just need to determine what level of detail of each change you need and persist that with an appropriate key.

2) Has nothing to do with denormalization. Storing summary data does not make the database denormalized. Storing results derived from non key attributes in the same table would be an example of denormalization but that doesn't seem to be what you are talking about here.