Have you looked into using a pivot table?
Pivot table seems like the ideal solution if your data set is not too large, and you need to update the "all orders" sheet frequently.
You could also autofilter based on the "customer" column, but that's fairly cumbersome. Probably useful if you make an "all orders" set at the end of the year- marginally more useful than just sorting on the "customer" column.
Any of those ideas useful?
Re: Have you looked into using a pivot table?
Can you tell me more about using the pivot table? How will I do this? I really have no idea. Thank you!
Que
basic pivot table scenario
If you have col(A) for customers and col(B) for "orders", then select colA and B, then
Data-->Pivot Table and Pivot Chart Report and the pivot chart wizard comes up.
select "microsoft excel list or database" and "pivot table" on the first screen,
click "OK"
on the next screen make sure that the range you selected is correct and click "next"
on the next screen you can choose from a new worksheet or within this worksheet for pivot table creation. Click the "layout" button and drag the "customer" button over to the "row" area and the "order" button to the "column" area. also drag the "order" button to the "data" area (the default operator here is count, which may be what you want here). Click "OK" and click "finish"
The new pivot table should list each unique customer down its first column, and each unique order across the top row, at the intersection of each column and row within the table will be the number of times that order has been placed for that customer.
Hope that helps
Couple of informative sites
Try this link for a UCLA document teaching staffers how to use a pivot table
ftp://www.deans.medsch.ucla.edu/pub/Manuals/pivot.doc
and this from the Denver business Journal (I found it through "MathTools.net"
http://denver.bcentral.com/denver/stories/1996/10/07/smallb4.html