One way...

Assuming the last date means the most recent date.

Array entered** :

=MAX(IF(Sheet2!A2:A12000=A2,Sheet2!C2:C12000))

Format as Date

** array formulas need to be entered using the key combination of
CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
key then hit ENTER.

--
Biff
Microsoft Excel MVP


"Don" wrote in message
...
I have a worksheet listing batch shipment information by qty and date.
There
are 12,000 rows. The same batch can/will be shipped on multiple dates, or
the
same date.

Supporting worksheet
A B C
1 Batch Qty Date
2 1111 12 1-1
3 1111 10 1-1
4 3333 5 1-1
5 2222 10 1-5
6 1111 4 1-5
7 3333 13 1-8
8 2222 5 1-8


I can use VLOOKUP to return the First date each batch was shipped.
What can I use to return the Last date found in the worksheet for each
batch
shipped?


Primary worksheet
A B C
1 Batch First Date Last Date
2 1111 1-1 ????
3 2222 1-5 ????
4 3333 1-1 ????

--
Thanks!!
Don