Finding the complements between the two data sets

[psenku]

Hi,
I am working on a data handling wherein i am required to find the values that are in column A but not present in column B. For example, if the column A has 1,2,3,4,5 and B has 1,3,5, i want to get the values 2,4 which are not present in the column B. i am dealing with million rows and finding it difficult the get the complement records. I am using MS Office 2003. Any help is greatly appreciated.

Regards,
Senthil