Telemetry/LongitudinalExamples

Note: There is good background in the example notebook for the longitudinal data set.

Get an overview of the longitudinal data table:

describe longitudinal_v20160229

That table has a row for each client, with columns for the different parts of the ping. Some properties are directly available to query on:

SELECT count(*) AS count
FROM longitudinal_v20160229
WHERE os = 'Linux'

Arrays

Other properties are arrays, which contain one entry for each submission from that client (newest first):

SELECT element_at(reason, 1) AS last_reason
FROM longitudinal_v20160229
WHERE os = 'Linux'

Links:

• Documentation on array functions

Maps

Some fields like active_addons or user_prefs are handled as maps, on which you can use the [] operator and special functions:

WITH adp AS
  (SELECT active_addons[1]['{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}']
            IS NOT null AS has_adblockplus
   FROM longitudinal_v20160229)
SELECT has_adblockplus, count(*) AS count
FROM adp GROUP BY 1 ORDER BY 2 DESC

Links:

• Documentation on map functions

Examples

• Blocklist URLs (extensions.blocklist.url):

SELECT bl, COUNT(bl)
FROM
  (SELECT element_at(settings, 1).user_prefs['extensions.blocklist.url'] AS bl
   FROM longitudinal_v20160229)
GROUP BY bl

• Blocklist enabled/disabled (extensions.blocklist.enabled) count:

SELECT bl, COUNT(bl)
FROM
  (SELECT element_at(settings, 1).blocklist_enabled AS bl
   FROM longitudinal_v20160229)
GROUP BY bl