> > Is it possible to connect to a firebird database in sigle user mode?
>
> Single user (SYSDBA/db owner) mode - yes.
> Single connection mode - no.
>
> (But if nobody is connected, you can rename the db file -
> then users will not be able to connect using its original name.)

Or connect using Embedded engine - it will lock the db file,
so you get "real" single user mode.

Ivan