The database type is MDB, and the database engine uses an OLE-DB connection method.
The aggregation query-sum sum findment is used in the Select query, and the two field values of the summary will be divided. Since the fraction of the fragment value occurs, the division operation error is wrong, and the return record set result is empty. .
Summary: Don't be as possible
SQL
The division operation is made in the statement unless you already know that the divided is not possible!