Filtering Numbers spreadsheet by unique values
I am often working with data from disparate systems where I need to refine the data to unique values. As much as I like to brag about how easy it is to use Number vs. Excel, I find it very difficult to filter the data to unique values by column. In my most recent case, I am needing to filter through 5 years of accounts payable Purchase Orders by vendor number and want to simply have a list of unique Vendor Numbers which seems overly complicated compared to the Excel function available. I wish I could give you more detailed specific but I'm hoping someone will understand what I'm talking about and have some constructive feedback on how to accomplish this sort (no pun intended) task in Numbers. Thank you ;-)