There are more than 300 queries in my MDB. Any quick way to search whether a sub-query is in use or not as the sub-query may appear in other main query.
Not to the best of my knowledge. Microsoft used to have a utility that would search through everything (including queries) for something you typed in. I think it was in the developers kit. But it was for Access 2003 and I don't think it made it to the newer versions. You could select where you wanted to search. If you find a replacement, make sure you post it here. I used it.
The slow way I can think of is to copy/paste the sql from all queries into a Word doc, then do a find to see if the subquery name appears.