Question

我有两个表，一个用于员工，另一个用于当前和过去的活动。我需要一个函数/查询，根据类型为下一个活动选择一个员工。这是样本数据：

表员工

EmployeesID UserName    Type    Available
1           Bill    Clerical    1
2           Ann     Clerical    1
3           John    Technical   1
4           Jack    Technical   0
5           Mary    Clerical    0
6           Sam     Technical   0
7           Mark    Clerical    1
8           Andy    Clerical    1
9           Rick    Clerical    1
10          Nancy   Clerical    1

活动

ActivityID  EmployeesID Status  Task_Datetime
101                2    Complete    6/11/2016 10:00
102                1    Complete    6/11/2016 10:12
103                3    Complete    6/11/2016 10:24
104                4    Complete    6/11/2016 10:36
105                7    Complete    6/11/2016 10:48
106                6    Complete    6/11/2016 11:00
107                5    Complete    6/11/2016 11:12
108                8    Complete    6/11/2016 11:24
109               10    Complete    6/11/2016 11:36
110                9    Complete    6/11/2016 11:48
111                5    Complete    6/11/2016 12:00
112                8    Complete    6/11/2016 12:12
113                3    Complete    6/11/2016 12:24
114                4    Complete    6/11/2016 12:36
115                1    Complete    6/11/2016 12:48
116                6    Complete    6/11/2016 13:00
117                7    Complete    6/11/2016 13:12
118                2    Complete    6/11/2016 13:24
119                9    Complete    6/11/2016 13:36
120               10    In Progress 6/11/2016 13:48
121                1    In Progress 6/11/2016 14:00
122                2    Complete    6/11/2016 14:12
123                3    Complete    6/11/2016 14:24
124                4    Complete    6/11/2016 14:36
125                6    In Progress 6/11/2016 14:48

需要在没有正在进行的活动的情况下分配给可用的员工匹配类型如果一切正在进行中，则返回0 如果有多个可用，则分配给已分配的那个。

因此，如果下一次分配是文书，请不要在进行中取1或10 但是最后一位完成了2,5,7,8,9（其他未被占用的人）的文职人员是8人（因为没有，所以跳过5人）。

如果下一次分配是技术性的，那么应该转到John，如果john不可用，则应该返回null。

到目前为止写了这样的东西：

function: NextEmployee('Clerical')

Select EmployeeID from Employees e , Activities a where e.available= 1 and e.type='Clerical' and

Answer 1

此代码使用window function查找每位员工的最后一项活动，然后检查此活动是否为“完成”状态：

DECLARE @Type VARCHAR( 20 )
SET @Type = 'Clerical'
SELECT TOP 1 TaskType, EmployeesID, Task_DateTime
FROM(
    SELECT E.EmployeesID, E.TaskType, Task_DateTime, ActivityStatus, ROW_NUMBER() OVER( PARTITION BY A.EmployeesID ORDER BY Task_DateTime DESC ) AS LatestEmploeeTask
    FROM #Activities AS A
        INNER JOIN #Employees AS E ON A.EmployeesID = E.EmployeesID
    WHERE Available = 1 ) AS a
WHERE LatestEmploeeTask = 1 AND ActivityStatus = 'Complete'
    AND TaskType = @Type
ORDER BY Task_DateTime ASC

我必须将样本数据转换为可用的表数据。代码如下：

CREATE TABLE #Employees( EmployeesID INT, UserName VARCHAR( 10 ), TaskType VARCHAR( 20 ), Available BIT )
CREATE TABLE #Activities( ActivityID INT, EmployeesID INT, ActivityStatus VARCHAR( 20 ), Task_DATETIME DATETIME )

INSERT INTO #Employees
VALUES 
( 1, 'Bill', 'Clerical', 1 ),
( 2, 'Ann', 'Clerical', 1 ),
( 3, 'John', 'Technical', 1 ),
( 4, 'Jack', 'Technical', 0 ),
( 5, 'Mary', 'Clerical', 0 ),
( 6, 'Sam', 'Technical', 0 ),
( 7, 'Mark', 'Clerical', 1 ),
( 8, 'Andy', 'Clerical', 1 ),
( 9, 'Rick', 'Clerical', 1 ),
( 10, 'Nancy', 'Clerical', 1 )

INSERT INTO #Activities
VALUES
( 101, 2,    'Complete',    '6/11/2016 10:00'),
( 102, 1,    'Complete',    '6/11/2016 10:12'),
( 103, 3,    'Complete',    '6/11/2016 10:24'),
( 104, 4,    'Complete',    '6/11/2016 10:36'),
( 105, 7,    'Complete',    '6/11/2016 10:48'),
( 106, 6,    'Complete',    '6/11/2016 11:00'),
( 107, 5,    'Complete',    '6/11/2016 11:12'),
( 108, 8,    'Complete',    '6/11/2016 11:24'),
( 109, 10,    'Complete',    '6/11/2016 11:36'),
( 110, 9,    'Complete',    '6/11/2016 11:48'),
( 111, 5,    'Complete',    '6/11/2016 12:00'),
( 112, 8,    'Complete',    '6/11/2016 12:12'),
( 113, 3,    'Complete',    '6/11/2016 12:24'),
( 114, 4,    'Complete',    '6/11/2016 12:36'),
( 115, 1,    'Complete',    '6/11/2016 12:48'),
( 116, 6,    'Complete',    '6/11/2016 13:00'),
( 117, 7,    'Complete',    '6/11/2016 13:12'),
( 118, 2,    'Complete',    '6/11/2016 13:24'),
( 119, 9,    'Complete',    '6/11/2016 13:36'),
( 120, 10,    'In Progress', '6/11/2016 13:48'),
( 121, 1,    'In Progress', '6/11/2016 14:00'),
( 122, 2,    'Complete',    '6/11/2016 14:12'),
( 123, 3,    'Complete',    '6/11/2016 14:24'),
( 124, 4,    'Complete',    '6/11/2016 14:36'),
( 125, 6,    'In Progress', '6/11/2016 14:48')

选择基于员工的可用性查询SQL Server 2012

1 个答案: