how can i update existing database of my android app on every device?

this app has many features but one is this ,the student can search his desired book ,and the app will then show him where this book is ,which row which shelf ..author name ,tag number .. if new books arrived to library how i can update the existing database which will be on every phone , can i send the updated database how it will be possible ? or can i send new sql queries how that will be possible ? or any suggestion from you ? the app is offline i dont want it to use internet every time ,just for updation only once in a week.