Question

I have an sqlite database as follows

id number 
1    24
2    34
3    65

I would like to sum up the total of the number column and print the output. I’ve tried the following but get “sqlite_fetch_array() expects parameter 1 to be resource, object given”.

$database = new SQLiteDatabase('test.sqlite', 0666, $error);
$query = "SELECT SUM(Number) AS sums FROM Pushups"; 
$result = $database->query($query) or die($error); 
$i = sqlite_fetch_array($result); 

echo $i['sums'];  

Could someone please show me the correct way to do this
Thanks

Answer 1

If you use the “object oriented” style for creating the database connection, you have to use it consistently for all methods. That means you can’t mix the object oriented interface (the SQLite*-classes) and the procedural interface (the functions that start with sqlite_*).

So if you use the query method of SQLiteDatabase it returns an SQLiteResult object instance (as defined in the docs for SQLiteDatabase::query). If you check out the sqlite_fetch_array docs you can see that in the object oriented style, you have to use the SQLiteResult::fetch-method.

So your code should look like:

$result = $database->query($query) or die($error); 
$i = $result->fetch(); // use the `fetch`-method of the `SQLiteResult` instance

echo $i['sums'];