Here's some PHP you can try out:
$sth = mysql_query("SELECT rating, country, COUNT(*) AS RatingPerCountry
FROM userdata GROUP BY rating, country");
$rows = array();
$flag = true;
$table = array();
$table['cols'] = array(
array('label' => 'rating', 'type' => 'string')
);
$tempData = array();
$rows = array();
while($r = mysql_fetch_assoc($sth)) {
// add a new column for this country
$table['cols'][] = array('label' => $r['country'], 'type' => 'number');
if (is_null($tempData[$r['rating']])) {
$tempData[$r['rating']] = array();
}
$tempData[$r['rating']][$r['country']] = $r['RatingPerCountry'];
}
foreach ($tempData as $rating => $row) {
$temp = array();
foreach (array('v' => $i['datetime']) as $column) {
if ($column['label'] == 'rating') { // make sure this matches the label
used for the rating column
$temp[] = array('v' => $rating);
}
else {
$temp[] = array('v' => (int) $row[$column['label']]);
}
$rows[] = array('c' => $temp);
}
}
$table['rows'] = $rows;
$jsonTable = json_encode($table);
Note that this code expects that all countries have an entry for each
rating (even if it is 0). That likely won't be a problem, but it's worth
noting just in case.
On Saturday, March 23, 2013 8:03:05 AM UTC-4, Zarko wrote:
>
> Hi guys,
>
> I'm trying to implement google charts in one of my projects, but just
> can't get my head around how to construct a column array in PHP which will
> comply with Json formatting. In summary, this is what I have:
>
> 1) MySQL table with two columns "Country", "Rating", both of which hold
> string values (example: Germany can have a rating of "Good" or "Bad",
> depending on entries by users and their view on Germany).
>
> 2) In order to construct a numeric value, i.e. how many times has Germany
> been rated as "Good" for example, I have a following SQL query in my php
> file, which works as expected:
>
> $query = "SELECT rating, country, COUNT(*) AS RatingPerCountry FROM
> userdata GROUP BY rating, country";
>
> 3) A problem that I'm facing is how to code a dynamic array of countries
> as columns in Google Charts, which will hold numeric values, because all
> the PHP examples I've seen only have a static numeric colum, which can be
> labeled as "Country" for example. What I really need instead of static
> label "Country", is to dynamically import countries from my database as
> columns. Does that make sense?
>
> I've constructed an example in Google Playground of how I'd expect my
> chart to look like. Thanks in advance for any help I can get:
>
>
>
> <https://lh3.googleusercontent.com/-yt_hdYoUftk/UU2ZsZVsBMI/AAAAAAAAABk/QqNCOYk3uN0/s1600/Screen+shot+2013-03-23+at+11.30.01.png>
>
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