SQL 服务器中日期的第一个和最后一个记录

Question

我想生成一个用户登录报告，其中我想向用户显示一个月中每一天的首次登录时间和最后一次注销时间。 UserLoginSession的table如下

UserLoginSessionId	UserId	LoginDate	LogoutDate
1310582	59	2021-04-30 15:49:54.997	2021-04-30 17:31:18.833
1310579	59	2021-04-30 14:53:51.460	NULL
1310575	59	2021-04-30 14:39:45.937	2021-04-30 14:52:23.150
1310569	59	2021-04-30 13:49:36.137	NULL
1300484	59	2021-04-28 15:17:48.837	NULL
1300478	59	2021-04-28 12:17:50.200	NULL
1300466	59	2021-04-28 04:23:48.697	2021-04-28 07:45:11.937
1299527	2466	2021-04-18 06:07:51.070	NULL
1299489	2466	2021-04-17 06:57:01.860	2021-04-17 06:57:28.260
1299449	2466	2021-04-16 10:16:54.730	NULL
1299442	2466	2021-04-16 10:08:30.187	2021-04-16 10:36:05.963
1299422	2466	2021-04-16 07:30:32.990	2021-04-16 10:15:25.777

输出报告应如下所示，如果注销日期为空，则应采用当天的结束时间

UserId	LoginDate	LogoutDate
59	2021-04-30 13:49:36.137	2021-04-30 17:31:18.833
59	2021-04-28 04:23:48.697	2021-04-28 23:59:59.000
2466	2021-04-18 06:07:51.070	2021-04-18 23:59:59.000
2466	2021-04-17 06:57:01.860	2021-04-17 06:57:28.260
2466	2021-04-16 07:30:32.990	2021-04-16 23:59:59.000

我试过下面的查询，但它在不同的行中给我输出。

select  UserId, case when rn1 = 1 then LoginDate end as [LoginDate], case when rn2 = 1 then LogoutDate end as [LogoutDate]
from    (
        select  
        row_number() over (partition by U.UserId, convert(date,s.LoginDate) order by s.LoginDate) as rn1, 
        row_number() over (partition by U.UserId, convert(date,s.LogoutDate) order by s.LogoutDate desc) as rn2, 
        S.*
        from    UserLoginSession S
        where S.CreatedAt between @StartDate and @EndDate
        ) as SubQueryTable
where rn1 = 1 or rn2 = 1

我无法在查询中将这两条记录放在一行中。如何修改我的查询以获得所需的结果？

Answer 1

使用 MIN 和 MAX 并在 LogoutDate 为 NULL 时进行修改：

SELECT UserId, CONVERT(date, LoginDate), MIN(LoginDate), ISNULL(MAX(LogoutDate), DATEADD(MS, -2, CONVERT(DATETIME,DATEADD(D, 1, CONVERT(date, LoginDate)))))
FROM UserLoginSession
GROUP BY UserId,CONVERT(date, LoginDate)
ORDER BY UserId,CONVERT(date, LoginDate)

SQL 服务器中日期的第一个和最后一个记录

First and last record of a date in SQL Server

sql

sql-server

subquery