I recommend linking the tables. It is much easier, more flexible and a proven method. As I mentioned previously, you can also create and perform updates in VB code using ADO.
However, you could create a query in the external database and reference that query from the Update query. Terry Broadbent
Please review faq183-874.
"The greatest obstacle to discovery is not ignorance -- it is the illusion of knowledge." - Daniel J Boorstin