Extract common values from two lists
Once we have identified common values, we can extract a list of common values from either list. This is because we need the resulting array from XMATCH to match the dimensions of thearrayprovided to FILTER. The first step in this process is identifying common values. Since the lookup item in XMATCH is most often a single value, you might find this configuration strange. Rest assured, there is a method to this madness....