4)how to validate row to row comparision?

[#1]

see i have 1 lakh record but i want do  row to row comparision ?  how ?

[#2]

4)What do you mean by a 1 lakh record???

[#3]

data validation i need to perform ?  i have data in  XL  for example i have 1 lakh record how can i go for row to row comparision?

[#4]

What kinds of comparisons are you trying to do?  Could you share a sample qvw?