+ QSqlQuery *_get_track_count_query;
+ QSqlQuery *_get_tracks_by_pattern_query;
+ QSqlQuery *_get_track_id_by_source_query;
+ QSqlQuery *_get_directories_query;
+ QSqlQuery *_get_artists_count_query;
+ QSqlQuery *_get_albums_count_query;
+ QSqlQuery *_get_tracks_count_query;
+ QSqlQuery *_get_tracks_source_from_query;