1. 将原标题翻译为中文：“BigQuery - 购物行为漏斗 + 登陆页面”

2. 针对购物行为漏斗和登陆页面，使用BigQuery查询语句进行数据调取和分析，示例如下：

购物行为漏斗：

SELECT IF(S2.is_cart IS NOT NULL AND S3.is_checkout IS NULL, 'Cart', '') AS action, COUNT(DISTINCT fullVisitorId) AS users FROM ( SELECT fullVisitorId, (SELECT MAX(IF(index=10, value, NULL)) FROM UNNEST(hits.customDimensions)) AS is_cart, (SELECT MAX(IF(index=11, value, NULL)) FROM UNNEST(hits.customDimensions)) AS is_checkout FROM bigquery-public-data.google_analytics_sample.ga_sessions_*, UNNEST(hits) AS hits WHERE _TABLE_SUFFIX BETWEEN '20160801' AND '20160831') GROUP BY action HAVING action != '' ORDER BY action

登陆页面：

SELECT hits.page.pagePath, COUNT(DISTINCT fullVisitorId) AS users FROM bigquery-public-data.google_analytics_sample.ga_sessions_*, UNNEST(hits) AS hits WHERE _TABLE_SUFFIX BETWEEN '20160801' and '20160831' AND hits.page.pagePath LIKE '/login%' GROUP BY hits.page.pagePath ORDER BY users DESC