Thanks for all the replies. I think I may not have been clear. Let me
clarify to see if this is possible:

My fist book A has the partial strings, just one column, maybe 50 rows
(subset of my customer database). My second sheet B, from which I need to
compare the names in sheet A, has the whole customer database.

So what I am trying to do is use the array in sheet A to populate "true" in
sheet B when the string in sheet A matches.

Can I use the array in Sheet A with the formulas you propose?

like:
=COUNTIF(B1:B100,"*"&A1:A50&"*")0 ??? It;s the array in Sheet A that's
throwing me...

Thanks Again,
Robert




" wrote:

Dave Peterson wrote...
....
But even simpler:
=isnumber(match("*" & a1 & "*",b1:b100,0))
will return true/false
....

But even shorter still,

=COUNTIF(B1:B100,"*"&A1&"*")0

will return True/False with a single function call. Now it may not
recalc as quickly, but there are times when nested function calls must
be kept to a minimum.