I am attempting to analyze sales for my company. I need to compare 1999 sales to 2000 sales and calculate the difference. Our company uses customer numbers, region codes, product class codes, etc. My problem is that when I run a query for 1999 sales and then run the query for 2000 sales, I cannot combine the numbers properly into one query and calculate the difference. I am now using 1999 and 2000 as different queries and then have master tables for each of the codes. The final report needs to have the names that are associated with the codes as well as the sales figures. Any help is appreciated.