I think none of them should exist.
And a related tag which also seems to be not necessary: sorting
sorting is worth keeping IMO. It is useful for searching SU in conjunction with any of the Excel tags like with this example search phrase:
The sorting tag can save SU users a lot of time. The search phrase
[microsoft-Excel] sorting returned 1,489 results, while the tag specific search phrase
[microsoft-Excel] [sorting] returned 104 results.