Query di base per l'esportazione dei dati sugli eventi di Google Analytics

  -- Replace table
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`

  -- Replace table
  `my-first-gcp-project.analytics_28239234.events_*`

-- Example: Query a specific date range for selected events.
--
-- Counts unique events by date and by event name for a specifc period of days and
-- selected events(page_view, session_start, and purchase).

SELECT
  event_date,
  event_name,
  COUNT(*) AS event_count
FROM
  -- Replace table name.
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`
WHERE
  event_name IN ('page_view', 'session_start', 'purchase')
  -- Replace date range.
  AND _TABLE_SUFFIX BETWEEN '20201201' AND '20201202'
GROUP BY 1, 2;

-- Example: Get 'Total User' (Active User), 'New User', and 'Returning User' counts.

WITH
  UserInfo AS (
    SELECT
      user_pseudo_id,
      MAX(IF(event_name IN ('first_visit', 'first_open'), 1, 0)) AS is_new_user
    -- Replace table name.
    FROM `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`
    -- Replace date range.
    WHERE _TABLE_SUFFIX BETWEEN '20201101' AND '20201130'
    GROUP BY 1
  )
SELECT
  COUNT(*) AS active_users,
  SUM(is_new_user) AS new_users,
  COUNT(*) - SUM(is_new_user) AS returning_users
FROM UserInfo;

-- Example: Average number of transactions per purchaser.

SELECT
  COUNT(*) / COUNT(DISTINCT user_pseudo_id) AS avg_transaction_per_purchaser
FROM
  -- Replace table name.
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`
WHERE
  event_name IN ('in_app_purchase', 'purchase')
  -- Replace date range.
  AND _TABLE_SUFFIX BETWEEN '20201201' AND '20201231';

-- Example: Query values for a specific event name.
--
-- Queries the individual timestamps and values for all 'purchase' events.

SELECT
  event_timestamp,
  (
    SELECT COALESCE(value.int_value, value.float_value, value.double_value)
    FROM UNNEST(event_params)
    WHERE key = 'value'
  ) AS event_value
FROM
  -- Replace table name.
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`
WHERE
  event_name = 'purchase'
  -- Replace date range.
  AND _TABLE_SUFFIX BETWEEN '20201201' AND '20201202';

-- Example: Query total value for a specific event name.
--
-- Queries the total event value for all 'purchase' events.

SELECT
  SUM(
    (
      SELECT COALESCE(value.int_value, value.float_value, value.double_value)
      FROM UNNEST(event_params)
      WHERE key = 'value'
    ))
    AS event_value
FROM
  -- Replace table name.
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`
WHERE
  event_name = 'purchase'
  -- Replace date range.
  AND _TABLE_SUFFIX BETWEEN '20201201' AND '20201202';

-- Example: Top 10 items added to cart by most users.

SELECT
  item_id,
  item_name,
  COUNT(DISTINCT user_pseudo_id) AS user_count
FROM
  -- Replace table name.
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`, UNNEST(items)
WHERE
  -- Replace date range.
  _TABLE_SUFFIX BETWEEN '20201101' AND '20210131'
  AND event_name IN ('add_to_cart')
GROUP BY
  1, 2
ORDER BY
  user_count DESC
LIMIT 10;

-- Example: Average number of pageviews by purchaser type.

WITH
  UserInfo AS (
    SELECT
      user_pseudo_id,
      COUNTIF(event_name = 'page_view') AS page_view_count,
      COUNTIF(event_name IN ('in_app_purchase', 'purchase')) AS purchase_event_count
    -- Replace table name.
    FROM `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`
    -- Replace date range.
    WHERE _TABLE_SUFFIX BETWEEN '20201201' AND '20201202'
    GROUP BY 1
  )
SELECT
  (purchase_event_count > 0) AS purchaser,
  COUNT(*) AS user_count,
  SUM(page_view_count) AS total_page_views,
  SUM(page_view_count) / COUNT(*) AS avg_page_views,
FROM UserInfo
GROUP BY 1;

-- Example: Sequence of pageviews.

/** Temporary function to retrieve the string_value of an event parameter by event name. */
CREATE TEMP FUNCTION GetParamString(event_params ANY TYPE, param_name STRING)
AS ((SELECT ANY_VALUE(value.string_value) FROM UNNEST(event_params) WHERE key = param_name));

/** Temporary function to retrieve the int_value of an event parameter by event name. */
CREATE TEMP FUNCTION GetParamInt(event_params ANY TYPE, param_name STRING)
AS ((SELECT ANY_VALUE(value.int_value) FROM UNNEST(event_params) WHERE key = param_name));

SELECT
  user_pseudo_id,
  user_id,
  batch_page_id,
  batch_ordering_id,
  batch_event_index,
  event_name,
  GetParamInt(event_params, 'ga_session_id') as ga_session_id,
  GetParamString(event_params, 'page_location') as page_location,
  GetParamString(event_params, 'page_title') as page_title,
FROM
  -- Replace table name.
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`
WHERE
  event_name = 'page_view'
  -- Replace date range.
  AND _TABLE_SUFFIX BETWEEN '20240718' AND '20240731'
ORDER BY
  user_pseudo_id,
  user_id,
  batch_page_id,
  batch_ordering_id,
  batch_event_index;

-- Example: List all available event parameters and count their occurrences.

SELECT
  EP.key AS event_param_key,
  COUNT(*) AS occurrences
FROM
  -- Replace table name.
  `bigquery-public-data.ga4_obfuscated_sample_ecommerce.events_*`, UNNEST(event_params) AS EP
WHERE
  -- Replace date range.
  _TABLE_SUFFIX BETWEEN '20201201' AND '20201202'
GROUP BY
  event_param_key
ORDER BY
  event_param_key ASC;