Question

我被要求更改一个数据透视查询，该查询当前连续一周显示一周的结束日期，类别和按小时的小时数。我被要求在行的末尾显示一个注释字段，我无法弄清楚如何更改查询来执行此操作。

表的结构如下

Category   Date      Comments     Hours
test       8/2/2010  myComment      2
test       8/3/2010                 8
test       8/4/2010                 4
test       8/5/2010                 3
test       8/6/2010                 5

我希望数据显示如下。我有一个查询将覆盖除评论之外的所有这些。在前端我只允许每周发表一条评论，并将其添加到表中的每周/类别组合的星期一日期行。

WeekEnding Category  SunHrs MonHrs TuesHrs WedHrs ThuHrs FriHrs SatHrs  Comment
8/7/2010   test      0      1      1     1      1      1      1       myComment

这是添加注释字段之前的查询，该字段工作正常。

DECLARE @WeekEnding datetime
DECLARE @UserName nvarchar(245)

SET @WeekEnding = '09/04/2010'
SET @UserName = 'brogers'


SELECT
   @WeekEnding      WeekEnding

  ,CategoryID
  ,isnull([1], 0)  SunHrs
  ,isnull([2], 0)  MonHrs
  ,isnull([3], 0)  TueHrs
  ,isnull([4], 0)  WedHrs
  ,isnull([5], 0)  ThuHrs
  ,isnull([6], 0)  FriHrs
  ,isnull([7], 0)  SatHrs
 from (select  CategoryID, Datepart(dw, TimeEntryDate) DOW, TimeEntryDuration Hours
        from dbo.aspnet_starterkits_TimeEntry
        where TimeEntryDate between dateadd(dd,  -6, @WeekEnding) and @WeekEnding) Source
  pivot (max(Hours) for DOW in ([1],[2],[3],[4],[5],[6],[7]) ) as pvt

我不确定如何将注释字段添加到行的末尾。当我添加它时，我得到一个像这样的结果

WeekEnding Category  SunHrs MonHrs TuesHrs WedHrs ThuHrs FriHrs SatHrs  Comment
8/7/2010   test      0      0      1       1      1      1      0       

8/7/2010   test      0      1      0       0      0      0      0       myComment

我只希望每个周末/类别组合有一行，输出中每行有一个注释。以下是我添加注释字段并显示错误的查询。

任何人都可以指出如何每周显示一条评论/分类行吗？

DECLARE @WeekEnding datetime
DECLARE @UserName nvarchar(245)

SET @WeekEnding = '09/04/2010'
SET @UserName = 'brogers'


SELECT
   @WeekEnding      WeekEnding
  ,TimeEntryDescription 
  ,CategoryID
  ,isnull([1], 0)  SunHrs
  ,isnull([2], 0)  MonHrs
  ,isnull([3], 0)  TueHrs
  ,isnull([4], 0)  WedHrs
  ,isnull([5], 0)  ThuHrs
  ,isnull([6], 0)  FriHrs
  ,isnull([7], 0)  SatHrs
 from (select  
        CategoryID, 
        Datepart(dw, TimeEntryDate) DOW, 
        TimeEntryDuration Hours, 
        TimeEntryDescription
        from dbo.aspnet_starterkits_TimeEntry
        where TimeEntryDate between dateadd(dd,  -6, @WeekEnding) and @WeekEnding) Source
  pivot (max(Hours) for DOW in ([1],[2],[3],[4],[5],[6],[7]) ) as pvt

即使源表有一周的每一天的评论字段，我只想要每周一个评论和每周一行/类别组合。

我将输入限制为每周只允许一个（例如星期一），并希望在输出查询的行末显示这一条注释。

Answer 1

使用旧式支点

可能更容易

;With [Source] As
(
select  
        CategoryID, 
        Datepart(dw, TimeEntryDate) DOW, 
        TimeEntryDuration Hours, 
        TimeEntryDescription
        from dbo.aspnet_starterkits_TimeEntry
        where TimeEntryDate between dateadd(dd,  -6, @WeekEnding) and @WeekEnding
)
SELECT
   @WeekEnding      WeekEnding
  ,TimeEntryDescription 
  ,CategoryID
  ,max(case when DOW = 1 then [Hours] else 0 end)  SunHrs
  ,max(case when DOW = 2 then [Hours] else 0 end)  MonHrs
  ,max(case when DOW = 3 then [Hours] else 0 end)  TueHrs
  ,max(case when DOW = 4 then [Hours] else 0 end)  WedHrs
  ,max(case when DOW = 5 then [Hours] else 0 end)  ThuHrs
  ,max(case when DOW = 6 then [Hours] else 0 end)  FriHrs
  ,max(case when DOW = 7 then [Hours] else 0 end)  SatHrs
  ,max(comment) as comment
 from [Source]
 group by 
   TimeEntryDescription 
  ,CategoryID

Answer 2

使用源表加入数据透视表，并检索min(comment)。

DECLARE @WeekEnding datetime
DECLARE @UserName nvarchar(245)

SET @WeekEnding = '09/04/2010'
SET @UserName = 'brogers'

;with Report as (
SELECT
   @WeekEnding      WeekEnding
  ,TimeEntryDescription 
  ,CategoryID
  ,isnull([1], 0)  SunHrs
  ,isnull([2], 0)  MonHrs
  ,isnull([3], 0)  TueHrs
  ,isnull([4], 0)  WedHrs
  ,isnull([5], 0)  ThuHrs
  ,isnull([6], 0)  FriHrs
  ,isnull([7], 0)  SatHrs
 from (select  
        CategoryID, 
        Datepart(dw, TimeEntryDate) DOW, 
        TimeEntryDuration Hours, 
        TimeEntryDescription
        from dbo.aspnet_starterkits_TimeEntry
        where TimeEntryDate between dateadd(dd,  -6, @WeekEnding) and @WeekEnding) Source
  pivot (max(Hours) for DOW in ([1],[2],[3],[4],[5],[6],[7]) ) as pvt
)
select * 
,(select min(comment) from dbo.aspnet_starterkits_TimeEntry te where TimeEntryDate between dateadd(dd,  -6, @WeekEnding) and @WeekEnding)) [Comment]
from Report r

T-SQL Pivot每周显示一个注释字段

2 个答案: