If you wanted to count the number of unique entries in that range, you could use
a formula like:

=sumproduct((a1:a10<"")/countif(a1:a10,a1:a10&""))
(you can only use the entire column in xl2007)

Curtis wrote:

Need a formaula to look at an entire column and count the number of
different times (say date of product)

Thanks
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ce

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Dave Peterson