我正在为我的公司开发一个Web应用程序。此应用程序为用户提供测验。现在，我需要为管理层开发一个功能强大且有意义的仪表板。仪表板必须显示show％participation =（每位员工所有测验的总和）/（员工总数*测验总数）
问题是：我有以下数据库设计：
员工表：用户名，姓名，职位，分部ID
分区表：DivisionID，DivisionName
测验表：QuizID，标题，描述
UserQuiz表：UserQuizID，Score，DateTimeComplete，QuizID，Username
注意：每个表中的第一个属性是主键。
我正在使用的SQL查询（但我不确定）显示完成百分比是：
DECLARE @LastDayOfPrevMonth DATETIME, @FirstDayOfThreeMonthsBefore DATETIME
SET @FirstDayOfThreeMonthsBefore = DATEADD(MONTH, -2, DATEADD(MONTH, DATEDIFF(MONTH, 0, CURRENT_TIMESTAMP), 0))
SET @LastDayOfPrevMonth = GETDATE()
;WITH MonthCTE AS
(
SELECT DATENAME(MONTH, DATEADD(MONTH, -2, CURRENT_TIMESTAMP)) + '-' + DATENAME(YEAR, DATEADD(MONTH, -2, CURRENT_TIMESTAMP)) AS MonthYear
UNION ALL
SELECT DATENAME(MONTH, DATEADD(MONTH, -1, CURRENT_TIMESTAMP)) + '-' + DATENAME(YEAR, DATEADD(MONTH, -1, CURRENT_TIMESTAMP))
UNION ALL
SELECT DATENAME(MONTH, DATEADD(MONTH, 0, CURRENT_TIMESTAMP)) + '-' + DATENAME(YEAR, DATEADD(MONTH, 0, CURRENT_TIMESTAMP))
)
SELECT Divisions.DivisionName
, [Percentage Participation] = CAST([Total Number of Quizzes Taken]
* 100.00 / [Total Number of Quizzes] AS DECIMAL(18, 2))
, [Total Number of Quizzes Taken]
, [Total Number of Quizzes]
, [Total Number of Employees]
, MonthYear [Month]
, LEFT([MonthYear],3) + RIGHT([MonthYear], LEN([MonthYear]) - CHARINDEX('-',[MonthYear]) + 1) FirstThreeLettersOfMonth
FROM dbo.Divisions Divisions CROSS JOIN
(SELECT ISNULL(NULLIF(COUNT(*),0),1) [Total Number of Quizzes]FROM [dbo].[Quiz] ) Quiz
OUTER APPLY (SELECT COUNT(*) AS [Total Number of Employees]
FROM [dbo].[employee]
WHERE employee.DivisionCode = Divisions.SapCode
) Employee
OUTER APPLY (
SELECT ISNULL([Total Number of Quizzes Taken],0) [Total Number of Quizzes Taken],
MonthCTE.MonthYear FROM
(SELECT COUNT(DISTINCT UserQuiz.QuizID) AS [Total Number of Quizzes Taken],
DATENAME(MONTH, UserQuiz.DateTimeComplete) + '-' + DATENAME(YEAR, UserQuiz.DateTimeComplete) MonthYear
FROM UserQuiz UserQuiz
INNER JOIN employee employee
ON UserQuiz.Username = employee.Username
WHERE employee.DivisionCode = Divisions.SapCode
AND UserQuiz.DateTimeComplete BETWEEN @FirstDayOfThreeMonthsBefore AND @LastDayOfPrevMonth
GROUP BY DATENAME(MONTH, UserQuiz.DateTimeComplete), DATENAME(YEAR, UserQuiz.DateTimeComplete)
)Quiz
RIGHT JOIN MonthCTE ON Quiz.MonthYear = MonthCTE.MonthYear
) QuizMonthOutput
我现在想要的只是显示上一个月的完成百分比。
我认为我现在的问题只是找到每个部门的员工总数，将其添加到上述查询的这一部分：
SELECT Divisions.DivisionShortcut
, [Percent Completion] = CAST([Sum of all Quizzes Taken by each Employee]
* 100.00 / ([Total Number of Employees]*[Total Number of Quizzes]) AS DECIMAL(18, 2))
那怎么做？
所需输出的示例：
计算应该是：完成百分比应如上所述计算，等于（每位员工所有测验的总和）/（员工总数*测验总数） 。例如，在A部门，如果有两名员工Emp1和Emp2。每个月，有四个测验。 Emp1参加了测验＃1和测验＃2，Emp2参加了测验＃4。完成百分比应为=（（Emp1 * 2测验）+（Emp2 * 1测验））/（员工总数*测验总数）
完成百分比=（2 + 1）/（2 * 4）= 2/8 = 0.25
答案 0 :(得分：1)
试试这个：
DROP TABLE #Employee
DROP TABLE #Division
DROP TABLE #Quiz
DROP TABLE #UserQuiz
CREATE TABLE #Employee(
Username CHAR(10),
Name VARCHAR(20),
Job VARCHAR(20),
DivisionID INT
)
INSERT INTO #Employee(Username, Name, Job, DivisionID) VALUES
('Me', 'Me', 'job1', 1),
('Myself', 'Myself', 'job2', 1),
('Andy', 'Andy', 'job3', 1),
('Ai', 'Ai', 'job4', 2)
CREATE TABLE #Division(
DivisionID INT,
DivisionName VARCHAR(20)
)
INSERT INTO #Division(DivisionID, DivisionName) VALUES
(1, 'Div1'),
(2, 'Div2')
CREATE TABLE #Quiz(
QuizID INT,
Title VARCHAR(20),
Description VARCHAR(20)
)
INSERT INTO #Quiz(QuizID, Title, Description) VALUES
(1, 'Quiz1', 'Quiz1'),
(2, 'Quiz2', 'Quiz2'),
(3, 'Quiz3', 'Quiz3'),
(4, 'Quiz4', 'Quiz4'),
(5, 'Quiz5', 'Quiz5'),
(6, 'Quiz6', 'Quiz6'),
(7, 'Quiz7', 'Quiz7'),
(8, 'Quiz8', 'Quiz8')
CREATE TABLE #UserQuiz(
UserQuizID INT,
Score INT,
DateTimeComplete DATETIME,
QuizID INT,
Username CHAR(10),
)
INSERT INTO #UserQuiz(UserQuizID, Score, DateTimeComplete, QuizID, Username) VALUES
(1, 10, '20000101', 1, 'Me'),
(2, 0, '20000101', 1, 'Myself'),
(3, 10, '20120210', 5, 'Me'),
(4, 10, '20120210', 6, 'Myself'),
(5, 10, '20120210', 7, 'Andy'),
(6, 10, '20120101', 5, 'Ai')
DECLARE @LastDayOfPrevMonth DATETIME, @FirstDayOfPrevMonth DATETIME
SET @FirstDayOfPrevMonth = DATEADD(dd, -DAY(DATEADD(mm, 1, GetDate()) - 1), DATEADD(mm, -1, GetDate()))
SET @LastDayOfPrevMonth = DATEADD(dd, -DAY(DATEADD(m, 1, GetDate())), DATEADD(m, 0, GetDate()))
;WITH LastMontQuizes AS
(SELECT distinct QuizID
FROM #UserQuiz
WHERE DateTimeComplete BETWEEN @FirstDayOfPrevMonth AND @LastDayOfPrevMonth
),
NumberOfQuizes AS
(SELECT COUNT(*) as NumberOfQuizes
FROM LastMontQuizes
),
NrOfQuizesPerDivision AS
(SELECT COUNT(*) as NrOfQuizesPerDivision, #Division.DivisionID
FROM #Division
INNER JOIN #Employee ON
#Division.DivisionID = #Employee.DivisionID
INNER JOIN #UserQuiz ON
#Employee.Username = #UserQuiz.Username
INNER JOIN LastMontQuizes ON
#UserQuiz.QuizID = LastMontQuizes.QuizID
GROUP BY #Division.DivisionID
),
NrOfEmployeesPerDivision AS
(SELECT COUNT(*) as NrOfEmployeesPerDivision, #Division.DivisionID
FROM #Division
INNER JOIN #Employee ON
#Division.DivisionID = #Employee.DivisionID
GROUP BY #Division.DivisionID
)
SELECT #Division.DivisionName,
NrOfQuizesPerDivision.DivisionID,
NrOfQuizesPerDivision.NrOfQuizesPerDivision * 100.0 / (NrOfEmployeesPerDivision.NrOfEmployeesPerDivision + NumberOfQuizes.NumberOfQuizes) AS Percentage,
NrOfQuizesPerDivision.NrOfQuizesPerDivision,
NrOfEmployeesPerDivision.NrOfEmployeesPerDivision,
NumberOfQuizes.NumberOfQuizes
FROM NrOfQuizesPerDivision
INNER JOIN NrOfEmployeesPerDivision ON
NrOfQuizesPerDivision.DivisionID = NrOfEmployeesPerDivision.DivisionID
INNER JOIN #Division ON
NrOfQuizesPerDivision.DivisionID = #Division.DivisionID
CROSS JOIN NumberOfQuizes