Question

我正在尝试计算在所有日期的30天内，或者在10天内至少有两次会话的用户数。

我的数据如下：

Date        UserID  SessionID 
1/1/2013    Bob1234    1
2/1/2013    Bob1234    2
2/2/2013    Bob1234    3
2/3/2013    Cal5678    4

这将导致下表（仅显示选择日期）

Date    CountActiveUsers
1/1/2013    1
1/15/2013   0
2/2/2013    1
2/3/2013    2

实际数据集包含连续数据范围内所有日期的值，结果表应包含每个日期的条目。

SessionID是唯一的，UserID始终引用同一个人。

到目前为止，我有两个问题可以解决问题。第一个用户返回过去一周的会话数：

SELECT Count(
d.[SessionID]
) As SessionPastWeek
      ,m.[UserID]
      ,m.[Date]
  FROM [Cosmos].[dbo].[Sessions_tbl] as m
  Inner Join [Cosmos].[dbo].[Sessions_tbl] as d 
on m.[UserID2] = d.[UserID] AND 
--Between does not work here for some reason
d.[Date] <= m.[Date] AND
d.[Date] > DATEADD(d,-7,m.[date])

  Group By m.[UserID]
      ,m.[Date]

另一个来自以下链接，该链接计算给定日期内活跃用户的数量 Active Users SQL query

我在SQL Server 2012中

我在将两者结合起来时遇到了麻烦。

编辑以供澄清：我需要的查询可能没有任何getdate（）或类似的，因为我需要知道有多少用户符合1月1日，今天的所有日期以及中间的所有日期。

感谢您的帮助！

Answer 1

我认为你只需要添加一个HAVING子句：

HAVING COUNT(d.[SessionID]) >= 2

在您的10/30查询中，只需将DATEADD（）更改为30天，然后将HAVING子句更改为＆gt; = 10.

    SELECT COUNT(d.[SessionID]) AS SessionPastPeriod
        , m.[UserID]
        , m.[Date]
    FROM Sessions_tbl AS m
        INNER JOIN Sessions_tbl as d
            ON m.UserID = d.UserID
            AND d.[Date] <= m.[Date]
            AND d.[Date] > DATEADD(d,-7,m.[Date])
    GROUP BY m.UserID
        , m.[Date]
    HAVING COUNT(d.[SessionID]) >= 2

我希望这会有所帮助。

Answer 2

你太近了。

SELECT Count(d.[SessionID]) As SessionPastWeek
      ,m.[UserID]
      ,m.[Date]
FROM [Cosmos].[dbo].[Sessions_tbl] as m
Inner Join [Cosmos].[dbo].[Sessions_tbl] as d on m.[UserID2] = d.[UserID]
--Between does not work here for some reason
where --ADD where clause
d.[Date] <= getdate() AND
d.[Date] > DATEADD(d,-7,getdate())
Group By m.[UserID],m.[Date]
having Count(d.[SessionID])>1 --The magical clause for you.

Answer 3

select  count(*)
from    (
        select  UserID
        ,       sum(case when Date between dateadd(day, -7, getdate()) and getdate()
                    then 1 end) as LastWeek
        ,       sum(case when Date between dateadd(day, -30, getdate()) and getdate()
                    then 1 end) as Last30Days
        from    Sessions_tbl
        group by
                UserID
        ) SubQueryAlias
where   LastWeek >= 2
        or Last30Days >= 10

Answer 4

以下查询有效：

Select
Count(UserID) As CountUsers
,[Date]
From(  
    SELECT COUNT(d.[SessionID]) AS SessionPastPeriod
        , m.[Date]
        , m.UserID
    FROM [Sessions_tbl] AS m
        INNER JOIN [Sessions_tbl]  as d
            ON m.UserID = d.UserID
            AND d.[Date] <= m.[Date]
            AND d.[Date] > DATEADD(d,-7,m.[Date])
    GROUP BY 
         m.UserID
         ,m.[Date]
    HAVING COUNT(d.[SessionID]) >= 2) SQ
    Group By [Date]

SQL：计算过去一周活动的用户

4 个答案: