SQL文（クエリ）

WITH master AS (
  SELECT
    cid
    , session_count
    , MAX(cv_page) AS cv
  FROM
    (
      SELECT
        *
        , IF(page = "/thank_you/", 1, 0) AS cv_page
      FROM
        sample.web_log
    )
  GROUP BY
    cid
    , session_count
)
SELECT
  SUM(cv) AS cv
  , COUNT(*) AS session
  , ROUND(SUM(cv) / COUNT(*), 4) AS cvr
FROM
  master

結果テーブル

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