Reordering table row SQLite UITableView - ios

Question

I am trying to order UITableView rows. I already implemented necessary methods and it works on my mutable array. However I don't know how can I apply this changes to my database.
My database has favs column
CREATE TABLE favs (
id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
w_name TEXT
);
I was using "insert or replace into favs (w_name) values ('%#%');" statement to insert new word to favs database. How can I change the id of two records so that I can list the favs values by order of id so that they will be sorted. For example I want to change my table from this
id|w_name
1|apple
2|banana
3|orange
to
id|w_name
1|apple
3|banana
2|orange
I can change the id if the key is not primary by using
UPDATE favs SET id = (CASE id WHEN 2 THEN 3 ELSE 2 END)
WHERE id IN (2, 3);
If I do like this I need to calculate id by myself each time I insert the record. So, how can re-order ids so that my changes in UITableView is reflected into database.

Answer 1

In all case, if you want to reorder you TableView, you've to reorder the array that feed the TableView.
You can execute the query again.
Or use that
yourArray = [yourArray sortedArrayUsingComparator:^NSComparisonResult(TYPE *p1, TYPE *p2){
return [p1 compare:p2];
}];
and finish with [tableView reloadData];

Answer 2

Add another column to your table and call it sort. There you will put the index of each record in your array [array indexOfObject:object]. Every time you want to save the order of your array you can update the sort column of each record e.g.
const char *sql = "UPDATE favs SET sort = ? WHERE id = ?";
if(sqlite3_prepare_v2(database, sql , -1, &updateStatment, NULL) != SQLITE_OK)
NSAssert1(0, #"Error while creating update statement. '%s'", sqlite3_errmsg(database));
sqlite3_bind_int(updateStatment, 1, [array indexOfObject:object]); sqlite3_bind_int(updateStatment, 2, [object id]);