Question

我有一个查询：

WITH DAY_WIDGET_STAT AS (
SELECT hits.eventInfo.eventCategory, hits.eventInfo.eventAction, hits.eventInfo.eventLabel, hits.page.pagePath  
FROM `api-open-broker.108613784.ga_sessions_20181125`, UNNEST(hits) as hits
WHERE hits.type='EVENT' and hits.eventInfo.eventCategory LIKE "%Widget%"
),
DAY_PAGEVIEWS_STAT AS (
SELECT hits.page.pagePath, COUNT(*) AS pageviews
FROM `api-open-broker.108613784.ga_sessions_20181125`,UNNEST(hits) AS hits
WHERE hits.type = 'PAGE' GROUP BY hits.page.pagePath ORDER BY pageviews DESC)

SELECT * 
FROM DAY_WIDGET_STAT INNER JOIN DAY_PAGEVIEWS_STAT ON DAY_WIDGET_STAT.pagePath=DAY_PAGEVIEWS_STAT.pagePath
LIMIT 10

哪个给我“不支持结果中的重复列名。找到重复项：pagePath”。为什么？表DAY_WIDGET_STAT： Look DAY_PAGEVIEWS_STAT： Look

Answer 1

重复项是pagePath；这在两个CTE中都有。在这种情况下，我可能会建议：

SELECT w.*,
       p.* EXCEPT (pagePath) 
FROM DAY_WIDGET_STAT w INNER JOIN
     DAY_PAGEVIEWS_STAT p
     ON w.pagePath = p.pagePath
LIMIT 10;

或者，USING也应该执行您想要的操作：

SELECT * 
FROM DAY_WIDGET_STAT w INNER JOIN
     DAY_PAGEVIEWS_STAT p
     USING (pagePath)
LIMIT 10;

您也许可以将查询重写为单个聚合，但是如果没有示例数据和所需结果，将很难确定。如果您有兴趣，可以问另一个问题。

BigQuery栏名称重复

1 个答案: