与时间查询有关的BigQuery问题

Question

您能在此查询上帮助我：我不明白为什么timestamp_millis不起作用

    SELECT DATE, 
           MAX(CASE WHEN customDimensions.index = 1 THEN customDimensions.value END) AS CUSTOMDIMENSIONS_VALUE, 
           visitNumber, 
           fullvisitorid, 
           device.deviceCategory, 
           hits.page.pagePath, 
           IFNULL(hits.page.pagePathLevel2, '') AS HITS_PAGE_PAGEPATHLEVEL2,            
           IFNULL(hits.page.pagePathLevel3, '') AS HITS_PAGE_PAGEPATHLEVEL3,
           hits.page.pageTitle, 
           TIMESTAMP_SECONDS(visitStartTime) AS visitStart,
           TIMESTAMP_MILLIS(1000 * visitStartTime + hits.time) AS hitStart, 
           hits.hitNumber, 
           hits.hour, 
           hits.minute, 
           hits.isEntrance, 
           hits.isExit, 
           CONCAT(fullvisitorid, STRING(visitid)) AS sessionid 
    FROM (FLATTEN([Table], customDimensions.value )) 
    WHERE hits.page.hostname CONTAINS 'X'' AND customDimensions.value != "null" AND hits.type = 'PAGE' AND (customDimensions.index = 1 OR hits.customDimensions.index = 11) 
    GROUP EACH BY DATE, visitStartTime, fullVisitorId, visitNumber, device.deviceCategory, hits.page.pagePath, hits.page.pageTitle, hits.hitNumber, hits.time, hits.hour, hits.minute, hits.isEntrance, hits.isExit 
    LIMIT 100000

Answer 1

我不明白为什么timestamp_millis不起作用。你能帮我

吗？

查询的问题是您在同一查询中使用了BigQuery Legacy SQL和Standard SQL的混合物。

例如：
查询的一部分下方 - 是传统SQL功能

FROM (FLATTEN([Table], customDimensions.value ))   

TIMESTAMP_MILLIS和TIMESTAMP_SECONDS仅由标准SQL支持 - 但是您可以在Legacy SQL中找到类似的功能（例如MSEC_TO_TIMESTAMP和SEC_TO_TIMESTAMP()）

您需要坚持一个或另一个。BigQuery Team推荐使用Standard SQL，我绝对第二！