Question

我有以下数据：

  Client_id     Call_started               Call_ended                 Outcome_id      
 ----------- -------------------------- -------------------------- ---------------- 
  111         Aug. 21, 2018, 4:10 p.m.   Aug. 21, 2018, 4:13 p.m.   Rescheduled     
  111         Aug. 22, 2018, 1:00 p.m.   Aug. 22, 2018, 1:10 p.m.   Rescheduled     
  112         Aug. 21, 2018, 3:10 p.m.   Aug. 21, 2018, 3:11 p.m.   Rescheduled     
  111         Aug. 22, 2018, 5:00 p.m.   Aug. 22, 2018, 5:08 p.m.   Interested      
  113         Aug. 22, 2018, 1:00 p.m.   Aug. 22, 2018, 1:10 p.m.   Rescheduled     
  114         Aug. 21, 2018, 2:10 p.m.   Aug. 21, 2018, 2:11 p.m.   NotReachable   
  112         Aug. 22, 2018, 9:10 a.m.   Aug. 22, 2018, 9:20 a.m.  NotInterested  
  113         Aug. 22, 2018, 5:20 p.m.   Aug. 22, 2018, 5:25 p.m.   Interested

下面是重新安排了客户呼叫的SQL查询

Select a.client_id, a.call_start,a.call_end, a.outcome_id
From client_analysis a
where a.outcome_id like %Rescheduled%'

现在，我还想选择后续重新安排的呼叫发生了什么（被按时呼叫等等）。如何选择对给定client.id的其他呼叫（或下一个a.call_start），其中a.outcome_id被重新计划（下一个a.call_start <重新计划a.call_end）？

以下是预期的输出：

 Client_id     Call_started               Call_ended                 Outcome_id      
 ----------- -------------------------- -------------------------- ---------------- 
  111         Aug. 21, 2018, 4:10 p.m.   Aug. 21, 2018, 4:13 p.m.   Rescheduled     
  111         Aug. 22, 2018, 1:00 p.m.   Aug. 22, 2018, 1:10 p.m.   Rescheduled     
  111         Aug. 22, 2018, 5:00 p.m.   Aug. 22, 2018, 5:08 p.m.   Interested      
  112         Aug. 21, 2018, 3:10 p.m.   Aug. 21, 2018, 3:11 p.m.   Rescheduled     
  112         Aug. 22, 2018, 9:10 a.m.   Aug. 22, 2018, 9:20 a.m.  NotInterested  
  113         Aug. 22, 2018, 1:00 p.m.   Aug. 22, 2018, 1:10 p.m.   Rescheduled     
  113         Aug. 22, 2018, 5:20 p.m.   Aug. 22, 2018, 5:25 p.m.   Interested

Call_start在给定client_id的同一列中，并且根据开始时间，我们可以确定调用的顺序。

Answer 1

这可以通过查找满足条件的客户的下一个电话（重新安排电话，查找下一个电话）来完成

这使用两个概念，LEAD-查找下一个值；和CASE WHEN-何时应用LEAD的条件

尝试以下SQL：

enable_shared_from_this

逐行解释：

仅当列Outcome_ID的行等于Resceduled时，CASE才执行语句。

如果重新安排了时间，LEAD将为下一个呼叫（ORDER BY呼叫已开始的ASC）的Client_ID（想想PARTITION BY与GROUP BY类似）查找Call_Started值

如果您想在此新列中放置与另一列不同的值，例如下一个呼叫的结束日期，请用LEAD（Call_Ended）等替换LEAD（Call_Started）等

SQL选择基于初始选择的跟进值

1 个答案: