20211118095340

WITH
  users AS (
  SELECT
    *
  FROM
    `logs.registeredUsers` WHERE schedule != "original" AND (schedule != "aggressiveStart")),
  initialReviews AS (
  SELECT
    DISTINCT userID,
    schedule,
    cardID
  FROM
    `logs.reviews`
  JOIN
    `users`
  USING
    (userID)
  WHERE
    sessionID IS NULL AND reviewCount = 1 AND reviewMarking = "forgotten" AND
    cardID IN(
    SELECT
      cardID
    FROM
      `logs.latestEssaysCards`
    WHERE
      essayName="qcvc")
   ),
  subsequentReviews AS (
  SELECT
    *,
    COUNTIF(reviewMarking="remembered") OVER (PARTITION BY userID, cardID ORDER BY timestamp ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING) AS priorCorrectCount,
    RANK() OVER (PARTITION BY userID, cardID ORDER BY timestamp) AS realReviewCount
  FROM
    `logs.reviews`
  JOIN
    initialReviews
  USING
    (userID,
      cardID)
  WHERE
    sessionID IS NOT NULL AND isRetry IS NOT TRUE),
  forgottenInFirstSession AS (
    SELECT userID, cardID, beforeInterval, realReviewCount FROM subsequentReviews WHERE priorCorrectCount = 1 AND reviewMarking="forgotten"
  )
SELECT
  forgottenInFirstSession.beforeInterval / (1000*60*60*24),
  COUNT(DISTINCT userID) AS N,
  COUNT(*) AS promptN,
  COUNTIF(reviewMarking="remembered") / COUNT(*) AS accuracy
FROM
  subsequentReviews JOIN forgottenInFirstSession USING (userID, cardID)
WHERE
  subsequentReviews.realReviewCount = forgottenInFirstSession.realReviewCount + 1
GROUP BY
  forgottenInFirstSession.beforeInterval
ORDER BY
  forgottenInFirstSession.beforeInterval