Answer Posted / Hansraj Meena
In iOS, when a new version of an application is released, the existing database is not updated automatically. To update the database, you need to migrate the data from the old schema to the new one. This can be done using Core Data's NSMigratePersistentStoresToNewVersion method or by manually managing the SQLite databases if you are using SQLite as your database.nnHere is a simple example of how you might use NSMigratePersistentStoresToNewVersion:n```swiftnlet migrate = NSMigratePersistentStoresToURL(store: persistentStoreCoordinator.persistentStoreUrls.first!, toDestinationURL: destinationURL, options: migrationOptions, withCompletionHandler: { success, error inn if let error = error {n print("Migration Failed: (error)")n } else if success == true {n print("Migration Successful.")n }n })```
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