Access users rely on queries to manipulate and analyze
their data, so it's important that queries be efficient and run quickly.
To get the most from your queries, try applying the following tips:
Include only the fields you really need.
Avoid on-the-fly queries; use stored queries whenever
possible.
Compact and compile often.
Avoid nesting queries.
Don't use the asterisk (*) character in the query
design grid; specify the individual field names instead.