When I run into this sort of issue, I generally try a two-step approach.
I would make turn the SELECT into a MAKE Table query.
Then I would run the update query based on the table that I have just made.
Remember to delete the temporary table afterwards.
I would make turn the SELECT into a MAKE Table query.
Then I would run the update query based on the table that I have just made.
Remember to delete the temporary table afterwards.