Recently I had to compare lots of sets of data. Determining if there are any differences at all, or if there are rows that exist in one but not the other, is easy. But I needed to compare every column, calculate match percentages, and report every difference.
I was able to take what would have been a lot of tedious query writing and create a standard way to do it. All you have to do is a little bit of prep on your two data sets, and these queries will compare, quantify, and report all mismatches. (more…)