Counting repetitions from a query

this is a fairly simple problem I am sure but I can't seem to
get my head round it!
I have downloaded a CSV of my sold items from ebay. I have
managed to query the CSV no problem, the thin is though, I want to
count how many times each item id appears in the file. for instance
I want to know how many times itemid 1 appears and how many times
itemid 2 appears etc.
Is it best to do this in the SQL statement or is there a CF
function that can do this for me?
basically the result I want is something like this:
ItemID (count)
1 (5)
2 (1)
3 (10)
4 (65)
5 (1)
etc etc
Thanks for your help!

SELECT itemID, COUNT(*) AS itemCount
FROM yourtable

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