Create a BigQuery view to summarize the Web Vitals data from GA and a helper function for restricting the date range

bigquery-web-vitals.sql

CREATE OR REPLACE VIEW httparchive.analytics_373060815.web_vitals AS (
  SELECT
    event_name AS metric_name,
    * EXCEPT(event_name, is_last_received_value)
  FROM (
    SELECT
      *,
      REGEXP_SUBSTR((SELECT value.string_value FROM UNNEST(event_params) WHERE key = 'page_location'), r'\/\/.*?(\/[^?]*)') AS page_path,
      ROUND((SELECT COALESCE(value.double_value, value.int_value) FROM UNNEST(event_params) WHERE key = 'value'), 3) AS metric_value,
      IF (ROW_NUMBER() OVER (PARTITION BY (
        SELECT
          value.string_value
        FROM
          UNNEST(event_params)
        WHERE
          key = 'event_label'
      ) ORDER BY (
        SELECT
          COALESCE(value.double_value, value.int_value)
        FROM
          UNNEST(event_params)
        WHERE
          key = 'value'
      ) DESC ) = 1, TRUE, FALSE) AS is_last_received_value
    FROM
      `httparchive.analytics_373060815.events_intraday_*`
    WHERE
      event_name IN ('CLS', 'FID', 'LCP', 'INP', 'FCP', 'TTFB')
  )
  WHERE
    is_last_received_value
);

CREATE OR REPLACE FUNCTION httparchive.analytics_373060815.FILTER_PREVIOUS_N_DAYS(dateStr STRING, n INT64, include_today BOOL) RETURNS BOOL AS (
  dateStr BETWEEN
    FORMAT_DATE('%Y%m%d', DATE_SUB(CURRENT_DATE, INTERVAL n DAY))
  AND
    FORMAT_DATE('%Y%m%d', DATE_SUB(CURRENT_DATE, INTERVAL IF(include_today, 0, 1) DAY))
);