Question

    Declare @SQL varchar(max) = 'Select NOM_EMP as [X],PRENOM_EMP as [Y],'
+ (Select Stuff((Select ',[' +cast(N as varchar(25))+']=''''' 
                From (Select Top (31) N=Row_Number() Over (Order By (Select null)) From master..spt_values n1) A
                For XML Path 
                (''))
                ,1,1,'')
   )
+ ' FROM EMPLOYE'

Exec(@SQL)

我在这里所做的是加载员工姓名+当月的天数（在本例中为31天）。上面的查询将导致如下所示：

employee表与(EMPLOYE_ID)相关，例如Requests表，每个请求都有一个start_date和end_date。

我要实现的是如果start_date和end_date的日号与单元格中的日号匹配，则写字母“ R”。

如果（第一位雇员）使用以下信息提出了请求： 2018年10月10日，并且 2018年8月14日

该表应如下所示：

这是现实的实现吗？如果是这样，我们将不胜感激。

编辑：

    Declare @D1 datetime = '2018-08-01'
Declare @D2 datetime = '2018-08-31'


Declare @Cols varchar(max) = (Select Stuff((Select ',[' +cast(N as varchar(25))+']' From (Select Top (DateDiff(DAY,@D1,@D2)+1) N=Row_Number() Over (Order By (Select Null)) From  master..spt_values n1) A For XML Path ('')),1,1,'') )
Declare @SQL varchar(max) = '
Declare @D1 date = '''+cast(@D1 as varchar(50))+'''
Declare @D2 date = '''+cast(@D2 as varchar(50))+'''

Select *
 From  ( 
        Select firstName,LastName,
              Item      = day(d)
              ,Value     = case when D between DEBUT_DRC and FIN_DRC then ''R'' else '''' end
         From DEMANDE_RECUPERATION DC INNER JOIN EMPLOYE E ON DC.MAT_EMP = E.MAT_EMP 
         Cross Join (
                        Select Top (DateDiff(DAY,@D1,@D2)+1) D=DateAdd(DAY,-1+Row_Number() Over (Order By (Select Null)),@D1) From  master..spt_values n1
                    ) B
       ) src
 Pivot (max(value) for Item in ('+@Cols+') ) pvt
'
Exec(@SQL)

输出：

Answer 1

只需稍微扩展动态SQL

示例

Declare @D1 date = '2018-08-01'
Declare @D2 date = '2018-08-31'


Declare @Cols varchar(max) = (Select Stuff((Select ',[' +cast(N as varchar(25))+']' From (Select Top (DateDiff(DAY,@D1,@D2)+1) N=Row_Number() Over (Order By (Select Null)) From  master..spt_values n1) A For XML Path ('')),1,1,'') )
Declare @SQL varchar(max) = '
Declare @D1 date = '''+cast(@D1 as varchar(50))+'''
Declare @D2 date = '''+cast(@D2 as varchar(50))+'''

Select *
 From  ( 
        Select A.Employee
              ,Item      = day(d)
              ,Value     = case when D between start_date and end_date then ''R'' else '''' end
         From YourRequestTable A
         Cross Join (
                        Select Top (DateDiff(DAY,@D1,@D2)+1) D=DateAdd(DAY,-1+Row_Number() Over (Order By (Select Null)),@D1) From  master..spt_values n1
                    ) B
       ) src
 Pivot (max(value) for Item in ('+@Cols+') ) pvt
'
Exec(@SQL)

返回

Answer 2

或多或少：

WITH cteDates AS ( SELECT [calDt] = @dtStart
                   UNION ALL
                   SELECT [CalDt] = DATEADD(DAY, [calDt], 1) FROM cteDates WHERE [calDt] <= @dtEnd)
SELECT pvt.*
  FROM ( SELECT e.EmployeeID, d.[calDt], [reqCount] = COUNT(*)
           FROM cteDates d
          CROSS JOIN Employee e
           LEFT JOIN reqTable rt ON rt.EmployeeID = e.EmployeeID
                                AND rt.d1 >= d.[cteDt]
                                AND rt.d2 <= d.[cteDt]
         GROUP BY e.EmployeeID, d.[calDt]
       ) unpvt
 PIVOT ( SUM(reqCount) FOR [calDt] IN ( [1],[2],...[31] )
       ) AS pvt

无需动态SQL

填充XML路径列

2 个答案: