You could attach another database file from the SQLite shell:
sqlite> attach database 'RelDb.sqlite' as RelDb; sqlite> .databases main: /db/UserDb.sqlite RelDb: /db/RelDb_1.sqlite sqlite> .tables RelDb.collectionRelationship contentStatus RelDb.contentRelationship genres RelDb.leagueRelationship recordingFilter RelDb.localizedString syncedContentStatus accountLevelSettings syncedThumbs collectionActivity thumbs
The tables from this 2nd database will be accessible via prefix of the database:
sqlite> select count(*) from RelDb.localizedString; 2442