What is denormalization in context of SQLSERVER?

Question

I have created two list boxes.
listbox1 has single selection and listbox 2 has multi-selection and 3 text-boxes. I want to insert the selected items from both list-boxes as well as data entered from text-boxes at same time. I mean same statement insert using c#.

Answer 1

Denormalization is the process of putting one fact in numerous places (its vice-versa of normalization).Only one valid reason exists for denormalizing a relational design - to enhance performance or if we are doing data warehousing and data mining. The sacrifice to performance is that you increase redundancy in database.