An Active User is defined as a client who has total_daily_uri >= 5 URI for a given date.

• Dates are defined by submission_date_s3.
• A client's total_daily_uri is defined as their sum of scalar_parent_browser_engagement_total_uri_count for a given date¹.

Active DAU is the number of Active Users on a given day.

Active MAU is the number of unique clients who have been an Active User on any day in the last 28 days. In other words, any client that contributes to Active DAU in the last 28 days would also contribute to Active MAU for that day. Note that this is not simply the sum of Active DAU over 28 days, since any particular client could be active on many days.

For quick analysis, using clients_daily_v6 is recommended. Below is an example query for getting Active DAU (aDAU) using clients_daily_v6.

SELECT
    submission_date_s3,
    count(*) AS total_clients_cdv6
FROM
    clients_daily_v6
WHERE
    scalar_parent_browser_engagement_total_uri_count_sum >= 5
GROUP BY
    1
ORDER BY
    1 ASC

main_summary can also be used for getting aDAU. Below is an example query using a 1% sample over March 2018 using main_summary:

SELECT
    submission_date_s3,
    count(DISTINCT client_id) * 100 as aDAU
FROM
    (SELECT
            submission_date_s3,
            client_id,
            sum(coalesce(scalar_parent_browser_engagement_total_uri_count, 0)) as total_daily_uri
        FROM
            main_summary
        WHERE
            sample_id = '51'
            AND submission_date_s3 >= '20180301'
            AND submission_date_s3 < '20180401'
        GROUP BY
            1, 2) as daily_clients_table
WHERE
    total_daily_uri >= 5
GROUP BY
    1
ORDER BY
    1 ASC

client_count_daily can be used to get approximate aDAU. This dataset uses HyperLogLog to estimate unique counts. For example:

SELECT
    submission_date AS day,
    cardinality(merge(cast(hll AS HLL))) AS active_dau
FROM client_count_daily
WHERE
    total_uri_count_threshold >= 5
    -- Limit to 7 days of history
    AND submission_date >= date_format(CURRENT_DATE - INTERVAL '7' DAY, '%Y%m%d')
GROUP BY 1
ORDER BY 1

1: Note, the probe measuring scalar_parent_browser_engagement_total_uri_count only exists in clients with Firefox 50 and up. Clients on earlier versions of Firefox won't be counted as an Active User (regardless of their use). Similarly, scalar_parent_browser_engagement_total_uri_count doesn't increment when a client is in Private Browsing mode, so that won't be included as well.