Hi

Use an unused column for this purpose and enter this formula:

=MATCH(A2,Sheet2!$A$2:$A$100,0)

where A2 is the first serial number to check and Sheet2!$A$2:$A$100 is the
column of other sheet with serial numbers.

Copy the formula down as required. If the formula result is #N/A the serial
number is not on both sheets.

Use an autofilter and filter fo #N/A to see all serial numbers which is only
on this sheet.

This has to be done for the other sheet too.

Hopes this helps.
....
Per

"C Kreig" skrev i meddelelsen
...
I have two worksheets with thousands of items. I want to ID which assets
were added in 3.2.09 but are now gone 7.1.09.

Only serialized items are of interest.

I am trying to figure out which serial numbers are in both worksheets.
Can you please help.
Thank you in advance for your time.