Question

I’m trying to retrieve a sum of a column and parse it with JSON.

To retrieve the sum I use:

SELECT SUM(price) FROM `Fuelconsumption` WHERE `date` like '%09-2012%'

When I use this command into my SQL Server directly, i get a figure result, when I try to parse it through JSON it doesn’t work.

Here is my JSON and PHP Code:

case 'getstats':

                    $query="SELECT SUM(price) FROM `Fuelconsumption` WHERE `date` like '%09-2012%'";
                    $result = mysql_query($query);

                    $json = array();
                        while($row = mysql_fetch_array($result))
                        {
                                $json['price']=$row['price'];
                        }
                        print json_encode($json);
                    mysql_close();
    break;

And this is my JS:

xmlhttp = new XMLHttpRequest()

xmlhttp.onreadystatechange = function () {
    if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
        var jsontext = xmlhttp.responseText;
        var json = JSON.parse(jsontext);



        console.log(jsontext)



    }
}

xmlhttp.open("GET", "mysql.php?p=getstats" + "&date=09-2012", true);
xmlhttp.send();

Answer 1

Try

$query="SELECT SUM(price) AS price FROM `Fuelconsumption` WHERE `date` like '%09-2012%'";

instead of

$query="SELECT SUM(price) FROM `Fuelconsumption` WHERE `date` like '%09-2012%'";

Also, why are you using normal Javascript to create Ajax requests instead of jQuery while your name is jQuerybeast? 😛