Do Not Allow Open Queries
Force the use of a search condition by not allowing open queries.
You can enforce the use of at least one query condition in a window by setting the Allow Open Query property to Off (default On).
When to use
Enforce a search condition within windows that are based on large tables. This way you prevent the user from issuing a Query All Records command accidentally.
To enforce the user to enter a search condition in a window:
If you limit query activity using the Allow Open Query property, it will still be possible for the user to use the %-wildcard.