i have 3 database that holds over 5000 entries each, its currently an sqlite format(local storage), but can also be sql(online). how would i join this, to the app i cant find any example or tutorials about it. also i dont wish to use the Backend as this will take ages.
what i hope my app does,
1st database contains list
2nd database information regarding a specific item in the list, which should be stored in users phone for offline usage.
i dont mind both of these database being on local storage, but both of these db will need weekly updates.