经过大量的各种SQL语法研究后，我仍然很短暂。
我有一个表格，其中存储数据：
LineNumber Date JobNumber Task Hours
------------------------------------------------------------------
1 2016-08-15 100 Task 1 0.5
1 2016-08-16 100 Task 1 2.0
2 2016-08-15 200 Task 2 4.0
3 2016-08-16 200 Task 3 1.5
4 2016-08-17 200 Task 6 3.5
我所做的是格式化结果，使它们看起来像这样：
LineNumber JobNumber Task Monday Tuesday Wednesday
--------------------------------------------------------------------------
1 100 Task 1 0.5 2.0 0.0
2 200 Task 2 4.0 0.0 0.0
3 200 Task 3 0.0 1.5 0.0
4 200 Task 6 0.0 0.0 3.5
使用CASE语句我可以接近。这只是让我失望的分组。因为我需要将任务分组，但它们不会，因为它们具有唯一的日期和小时值。
使用此：
DECLARE @UserID int;
DECLARE @StartDate date;
DECLARE @MondayDate date;
DECLARE @TuesdayDate date;
DECLARE @WednesdayDate date;
DECLARE @ThursdayDate date;
DECLARE @FridayDate date;
DECLARE @SaturdayDate date;
DECLARE @SundayDate date;
SET @UserID = '1';
SET @StartDate = '2016-08-15';
SET @MondayDate = @StartDate;
SET @TuesdayDate = DATEADD(DAY, 1, @StartDate);
SET @WednesdayDate = DATEADD(DAY, 2, @StartDate);
SET @ThursdayDate = DATEADD(DAY, 3, @StartDate);
SET @FridayDate = DATEADD(DAY, 4, @StartDate);
SET @SaturdayDate = DATEADD(DAY, 5, @StartDate);
SET @SundayDate = DATEADD(DAY, 6, @StartDate);
select LineNumber, JobNumber, JobName, Task,
Monday = (CASE WHEN Date = @MondayDate THEN Hours ELSE '0.0' END),
Tuesday = (CASE WHEN Date = @TuesdayDate THEN Hours ELSE '0.0' END),
Wednesday = (CASE WHEN Date = @WednesdayDate THEN Hours ELSE '0.0' END),
Thursday = (CASE WHEN Date = @ThursdayDate THEN Hours ELSE '0.0' END),
Friday = (CASE WHEN Date = @FridayDate THEN Hours ELSE '0.0' END),
Saturday = (CASE WHEN Date = @SaturdayDate THEN Hours ELSE '0.0' END),
Sunday = (CASE WHEN Date = @SundayDate THEN Hours ELSE '0.0' END)
From v_TimesheetDataLines
WHERE Date >= @MondayDate and Date <= @SundayDate and UserID = @UserID
Order By LineNumber asc
我可以接近，但我仍然会找到任务和工作号相同的未组合行。
我目前的结果是这样的：
LineNumber JobNumber Task Monday Tuesday Wednesday
--------------------------------------------------------------------------
1 100 Task 1 0.5 0.0 0.0
1 100 Task 1 0.0 2.0 0.0
2 200 Task 2 4.0 0.0 0.0
3 200 Task 3 0.0 1.5 0.0
4 200 Task 6 0.0 0.0 3.5
所以它的2行在我需要分组的最终结果中都是第1行。他们总是拥有相同的工作号和任务。
我尝试了各种CASE和嵌套的SELECTS但是不能完全实现。我在这里发现了一些关于枢轴的其他帖子，我认为这可能是一个解决方案。不幸的是，我很难理解这些陈述以及如何使用它们。
任何答案\帮助非常感谢。
答案 0 :(得分：0)
答案 1 :(得分：0)
供您考虑：
只是旁注，您可以在Group By参数中添加UserID并一次性完成。
Exec [prc-Pivot] 'Select * from YourData','DateName(WEEKDAY,Date)','sum(Hours)[]','LineNumber,JobNumber','count(*)[Records]'
返回
LineNumber JobNumber Records Monday Tuesday Wednesday
1 100 2 0.50 2.00 0.00
2 200 1 4.00 0.00 0.00
3 200 1 0.00 1.50 0.00
4 200 1 0.00 0.00 3.50
动态枢纽的存储过程
CREATE PROCEDURE [dbo].[prc-Pivot] (
@Source varchar(1000), -- Any Table or Select Statement
@PvotCol varchar(250), -- Field name or expression ie. Month(Date)
@Summaries varchar(250), -- aggfunction(aggValue)[optionalTitle]
@GroupBy varchar(250), -- Optional additional Group By
@OtherCols varchar(500) ) -- Optional Group By or aggregates
AS
--Exec [prc-Pivot] 'Select Year=Year(TR_Date),* From [Chinrus-Series].[dbo].[DS_Treasury_Rates]','''Q''+DateName(QQ,TR_Date)','avg(TR_Y10)[-Avg]','Year','count(*)[Records],min(TR_Y10)[Min],max(TR_Y10)[Max],Avg(TR_Y10)[Avg]'
--Exec [prc-Pivot] '#Temp','Attribute','max(Description)[]','ID','count(*)[Records]'
Set NoCount On
Declare @Vals varchar(max),@SQL varchar(max);
Set @Vals = ''
Set @OtherCols= IsNull(', ' + @OtherCols,'')
Set @Source = case when @Source Like 'Select%' then @Source else 'Select * From '+@Source end
Create Table #TempPvot (Pvot varchar(100))
Insert Into #TempPvot
Exec ('Select Distinct Convert(varchar(100),' + @PvotCol + ') as Pvot FROM (' + @Source + ') A')
Select @Vals = @Vals + ', isnull(' + Replace(Replace(@Summaries,'(','(CASE WHEN ' + @PvotCol + '=''' + Pvot + ''' THEN '),')[', ' END),0) As [' + Pvot ) From #TempPvot Order by Pvot
Drop Table #TempPvot
Set @SQL = Replace('Select ' + Isnull(@GroupBy,'') + @OtherCols + @Vals + ' From (' + @Source + ') PvtFinal ' + case when Isnull(@GroupBy,'')<>'' then 'Group By ' + @GroupBy + ' Order by ' + @GroupBy else '' end,'Select , ','Select ')
--Print @SQL
Exec (@SQL)
**
编辑 - 添加参数
**
Declare @MondayDate Date = '2016-08-15'
Declare @SundayDate Date = '2016-08-21'
Declare @UserID int = 1
Declare @SQL varchar(max) = 'Select * from YourTable Where Date>='''+cast(@MondayDate as varchar(10))+''' and Date<='''+cast(@SundayDate as varchar(10))+''' and UserID='+cast(@UserID as varchar(25))
Exec [prc-Pivot] @SQL,'DateName(WEEKDAY,Date)','sum(Hours)[]','LineNumber,JobNumber','count(*)[Records]'
不确定SQL Server的版本，但在构建SQL字符串
时，我会选择Concat