Spontane Idee, ohne es zu testen:
Delphi-Quellcode:
Query1.SQL.Clear;
// stmtParams := TParams.Create;
// stmtParams.CreateParam(ftString, 'DBName', ptInput );
Query1.SQL.Add( ' SELECT * FROM :DBName');
stmtParams.ParamByName('DBName').AsString := OvcFileComboBox1. Items[OvcFileComboBox1.ItemIndex];
Query1.Prepare;
// Query1.ExecSQL(); // wozo vor Open?
Query1.Open;
Query1.Close;