Quick Check

1.	Why is the width of rows important?
2.	What does de-normalization imply?
3.	Why should you avoid de-normalizing data that is frequently updated?

Answers

1.	The width of rows is important because wide rows take up more space and can cause a waste of both memory and disk space.
2.	De-normalization implies the storage of specific data redundantly.
3.	You should avoid de-normalizing data that is frequently updated because of the cost of maintaining the redundant data.