Well, then all you need to do is test for the presence of those 2 values
that correspond to "efg". I have a feeling that your sample data is "fake"
so any formula I suggest might not work on your real data since the formula
is based on your explanation. Anyhow, try this:

=IF(COUNTIF(A$2:A$20,"efg"),IF(AND(COUNTIF(B$2:B$2 0,567),COUNTIF(B$2:B$20,789)),INDEX({567,789},ROWS ($1:1)),IF(ROWS($1:1)=1,VLOOKUP("efg",A$2:B$20,2,0 ),"")),"")

Copy to a total of 2 cells.

--
Biff
Microsoft Excel MVP


"bonot1" wrote in message
...
Thanks. I am working with your suggestion, but I am not sure if I
expressed
my problem clearly.

Using your example, in A2:A20 there would be say three different values
"abc", "cde", and "efg". When I lookup in B2:B20, there is a "123" for
every
"abc", a "345" for every "cde"; VLOOKUP works fine for these. However,
rows
with "efg" in column A sometimes have "789" in column B and sometimes have
"567".

What I need is to 1) be made aware that "efg" has two different matches in
column B, and 2) know what the values of those two matches are. This is
what
I would like to automate.

"T. Valko" wrote:

Here's one way:

Assume data in A2:B20. You want to extract data from column B that
corresponds to a lookup_value.

D2 = lookup_value

Array entered** :

=IF(ROWS($1:1)=COUNTIF(A$2:A$20,D$2),INDEX(B$2:B$ 20,SMALL(IF(A$2:A$20=D$2,ROW(B$2:B$20)-MIN(ROW(B$2:B$20))+1),ROWS($1:1))),"")

Copy down until you get blanks.

** array formulas need to be entered using the key combination of
CTRL,SHIFT,ENTER (not just ENTER)


--
Biff
Microsoft Excel MVP


"bonot1" wrote in message
...
Data is in random order, and the data to be returned is text.

"T. Valko" wrote:

Is the data sorted so that the lookup_values are grouped together or
is
the
data random? Is the data to be returned text or numeric?

--
Biff
Microsoft Excel MVP


"bonot1" wrote in message
...
I am using LOOKUP functions to retrieve info from a list. Some of
the
lookup
values have more than one match in the list. Is there a function
that
allows
me to retrieve multiple elements for one lookup value, or at least a
function
that tells me there are duplicate matches?