Question

我试图从本质上连接两个表，找到两个表之间的公用数字，弄清call_counterparty的名称并创建一个结果表。我希望它显示call_counterparty的号码，而不是要查询的号码，在我们的情况下是（from_number）。例如，如果您打电话给我，您将成为我的呼入对手，我将成为您的呼出对手。如果我给您打电话，您将是我的外拨电话对手，而我将是你的外拨电话对方。我不确定如何区分“ call_counterparty”。

简而言之，被查询人打谁电话或接听谁打来的电话，他们的相关名字是什么？如果要连接的表中没有对应的名称，则显示null。假设我的电话号码是2228881111 ...，假设您甚至可以打电话给自己。

我正在使用的两个BigQuery数据库表是：

bigquery.call_log_table

bigquery.contact_list_table

from_number,to_number
2228881111,9997772222
2228881111,8883337777
8883337777,2228881111
2228881111,1112229999
6663332222,2228881111
2228881111,2228881111

这是我当前没有左联接或其他代码的代码：

number,name
9997772222,John
8883337777,Jill
2228881111,Me

当前结果：

SELECT CASE WHEN call_log.from_number = 
'2228881111' THEN 
call_log.to_number ELSE call_log.from_number END AS 
call_counterparty,
SUM(call_log.to_number = '2228881111') AS in_call,
SUM(call_log.from_number = '2228881111') AS out_call

FROM `bigquery.call_log_table` AS call_log

WHERE '2228881111' in (call_log.from_number, call_log.to_number)
GROUP BY call_counterparty

我想要的结果

call_counterparty,in_call,out_call
9997772222,0,1
8883337777,1,1
1112229999,0,1
6663332222,1,0
2228881111,1,1

我尝试了各种尝试，花了几个小时，用Google搜索了一吨，但我根本不知道。任何帮助将不胜感激！

Answer 1

尝试这样的查询：

WITH call_records AS (
  SELECT 
    CASE WHEN call_log.from_number = '2228881111' THEN call_log.to_number ELSE call_log.from_number END AS call_counterparty
    , SUM(IF(call_log.to_number = '2228881111',1,0)) AS in_call
    , SUM(IF(call_log.from_number = '2228881111',1,0)) AS out_call
  FROM `dataset.call_log_table` AS call_log
  WHERE '2228881111' in (call_log.from_number, call_log.to_number)
  GROUP BY call_counterparty
)
SELECT call_counterparty, contacts.name, in_call, out_call
FROM call_records 
LEFT JOIN `dataset.contact_list_table` as contacts
ON call_records.call_counterparty = contacts.number
GROUP BY call_counterparty, contacts.name, in_call, out_call

Answer 2

以下是用于BigQuery标准SQL

#standardSQL
SELECT 
  CASE WHEN call_log.from_number = '2228881111' THEN call_log.to_number ELSE call_log.from_number END AS call_counterparty
  , contacts.name
  , SUM(IF(call_log.to_number = '2228881111',1,0)) AS in_call
  , SUM(IF(call_log.from_number = '2228881111',1,0)) AS out_call
FROM `project.dataset.call_log_table` AS call_log
LEFT JOIN `project.dataset.contact_list_table` AS contacts
ON contacts.number = CASE WHEN call_log.from_number = '2228881111' THEN call_log.to_number ELSE call_log.from_number END
WHERE '2228881111' IN (call_log.from_number, call_log.to_number)
GROUP BY call_counterparty, contacts.name

BigQuery联接两个表并汇总结果

2 个答案: