Question

我需要你的帮助。我使用sql server 2012。此查询用于日志应用程序。我有一张这样的桌子：

这是一个有2个请求者的样本，这是我想要获得的结果。

我整个星期都在努力，仍然没有找到解决方案。我尝试了sql server 2012的滞后和引导功能，但它不起作用。

IF OBJECT_ID('tempdb..#test', 'U') IS NOT NULL
DROP TABLE #test;

CREATE TABLE #test
(
    requestid INT,
    eventdate DATETIME,
   eventname VARCHAR(20)
);

INSERT #test
(
    requestid,
   eventdate,
    eventname
)
VALUES
(46444, '2016/08/08 10:20:33.000', 'OPENED'),
(46444, '2016/08/08 10:33:10.000', 'REVIEWED'),
(46444, '2016/08/08 11:09:55.000', 'OPENED'),
(46444, '2016/08/08 11:32:41.000', 'REVIEWED'),
(46444, '2016/08/08 11:39:01.000', 'CLOSED'),
(46444, '2016/08/08 15:00:04.000', 'OPENED'),
(46444, '2016/08/08 15:17:40.000', 'REVIEWED'),
(46444, '2016/08/08 15:29:36.000', 'OPENED'),
(46444, '2016/08/08 15:31:34.000', 'REVIEWED'),
(46444, '2016/08/08 15:36:37.000', 'CLOSED'),
(46444, '2016/08/08 17:04:27.000', 'OPENED'),
(46445, '2016/08/10 09:00:00.000', 'OPENED'),
(46445, '2016/08/11 01:33:10.000', 'REVIEWED'),
(46445, '2016/08/12 15:36:37.000', 'CLOSED');

select *
from #test

结果

requestid   eventdate           eventname    CLOSEDDate      CLOSEDEventname
 46444  2016-08-08 10:33:10.000 REVIEWED    2016-08-08 11:39:01.000 CLOSED
 46444  2016-08-08 15:17:40.000 REVIEWED    2016-08-08 15:36:37.000 CLOSED
 46445  2016-08-11 01:33:10.000 REVIEWED    2016-08-12 15:36:37.000 CLOSED

Answer 1

我可以看到你想要的东西。对于每个关闭日期，您需要最早的审核日期。您可以通过枚举关闭以分配组然后聚合来执行此操作：

select requestid,
       min(case when eventname = 'REVIEWED' then eventdate end) as eventdate,
       'REVIEWED' as event,
       max(eventdate) as closedate,
       'CLOSED' as closedeventname
from (select t.*,
             sum(case when eventname = 'CLOSED' then 1 else 0 end) over (partition by requestid order by eventdate desc) as grp
      from #test t
     ) t
group by requestid, grp;
Having min(case when eventname = 'REVIEWED' then eventdate end) is not null

我很确定这会产生你想要的输出。如果您未能在问题中指定所需的其他规则，我强烈建议您更好地解释其他问题。

T sql查询。在日期列中标识开始日期/结束日期

1 个答案: