Question

SELECT
  C. cdrs_id AS cdrs_id,
  C. cdrs_cc_card AS cdrs_cc_card,
  C. cdrs_starttime AS cdrs_starttime,
  C. cdrs_sessiontime AS cdrs_sessiontime,
  S. login_source AS login_source
FROM
  [Dataset.Statistics_Application] AS S 
JOIN EACH [Dataset.User_Info] AS U ON  S. user_id = U. id 
JOIN EACH [Dataset.CDRSTrafficDB] AS C ON U. vcard = C. cdrs_cc_card AND C. cdrs_starttime BETWEEN S. start_date AND S. end_date
GROUP BY
  cdrs_id,
  cdrs_cc_card,
  cdrs_starttime,
  cdrs_sessiontime,
  login_source

有一种方法可以写入每个具有=条件和between条件的联接。 错误：ON子句必须与AND = =每个表中一个字段名称的比较，所有字段名称都以表名称为前缀。

Answer 1

BigQuery中的

Standard SQL没有此限制。您可以使用这种形式的查询；请注意，表名转义和删除EACH的区别：

#standardSQL
SELECT
  C. cdrs_id AS cdrs_id,
  C. cdrs_cc_card AS cdrs_cc_card,
  C. cdrs_starttime AS cdrs_starttime,
  C. cdrs_sessiontime AS cdrs_sessiontime,
  S. login_source AS login_source
FROM
  `Dataset.Statistics_Application` AS S 
JOIN `Dataset.User_Info` AS U ON  S. user_id = U. id 
JOIN `Dataset.CDRSTrafficDB` AS C ON U. vcard = C. cdrs_cc_card AND C. cdrs_starttime BETWEEN S. start_date AND S. end_date
GROUP BY
  cdrs_id,
  cdrs_cc_card,
  cdrs_starttime,
  cdrs_sessiontime,
  login_source

Google BigQuery在3个表之间进行联接

1 个答案: