I've checked contacts2.db, but contacts table doesn't have display_name column

Android Programming (3rd Edition) 15. Implicit Intents
1

I pulled contacts2.db from emulator(API 19) and checked contacts table.

It doesn’t have display_name column.

However, after executing the following code,

Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent, REQUEST_CONTACT);

public void onActivityResult(int requestCode, int resultCode, Intent data) {
	if (resultCode != Activity.RESULT_OK) {
		return;
	}
	
	if (requestCode == REQUEST_DATE) {
	...
	
	} else if (requestCode == REQUEST_CONTACT && data != null) {
		Uri contactUri = data.getData();
		
		// Perform your query - the contactUri is like a "where" clause here
		Cursor c = getActivity().getContentResolver().query(contactUri
			, null
			, null
			, null
			, null);
			
		//cursor null check
		
		try {
			// Double-check that you actually got results
			if (c.getCount() == 0) {
				return;
			}
			c.moveToFirst();
			String[] names = c.getColumnNames();
		} finally {
			c.close();
		}
	}
}

When I checked names, the list of columns is

sort_key
photo_uri
send_to_voicemail
contact_status
contact_status_label
pinned
display_name
phonebook_label_alt
phonebook_bucket
contact_status_res_package
photo_id
in_default_directory
custom_ringtone
_id
times_contacted
phonebook_label
lookup
display_name_alt
phonetic_name
last_time_contacted
contact_last_updated_timestamp
has_phone_number
in_visible_group
is_user_profile
display_name_source
photo_file_id
contact_status_ts
phonebook_bucket_alt
sort_key_alt
contact_presence
starred
photo_thumb_uri
contact_status_icon
contact_chat_capability
phonetic_name_style
name_raw_contact_id

It includes display_name column. How is it possible??