JSON object extract from big query database using app script - json

Question

I have a big query table that has a JSON object as one of the field in the table. How can I extract the data from the JSON object using app script. The object itself is nested. It looks like this
{
"uid": "124551",
"subjects": [
{
"tid": 37,
"title": "Algebra",
"html_id": "algebra",
"selected": true
},
{
"tid": 214853,
"title": "Trigonometry",
"html_id": "trigonometry",
"selected": true
},
{
"tid": 38,
"title": "Geometry",
"html_id": "geometry",
"selected": true
}
],
"cellphone": "09178854579",
"educations": [
{
"index": 0,
"schoolname": "University of the Philippines - Los Baños",
"degree": "BS Mathematics",
"major": "Mathematics",
"eduFrom": "2009-05-31T16:00:00.000Z",
"eduTo": "2013-04-26T16:00:00.000Z",
"eduFromTs": 1243785600,
"eduToTs": 1366992000
}
],
"info": {
"os": "Windows",
"internet": "ADSL",
"browser": "Chrome",
"network": "Wireless",
"speed": "",
"timezone": "Asia/Hong_Kong"
}
}
I want to extract all school names from education field. Any ideas?

Answer 1

Working with JSON objects is similar to working with XML, except that parsing or encoding a JSON object is much easier.
Once this string is retrieved, simply call JSON.parse() on the string to get a native object representation.
var data = JSON.parse(json);
Browser.msgBox(data.info.os);
Other sample code is at https://developers.google.com/apps-script/advanced/bigquery#run_query