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POHow to modify this SQL Query to show the percentage of participation in the last sending quiz in each division in the company?
 

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  1. POHow to modify this SQL Query to show the percentage of participation in the last sending quiz in each division in the company?
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    <p>I have the following query that shows the number of participants in the last sending quiz in each division. I want to keep it as it is but instead of showing the number of participants, I want to show the percentage of participation in the last sending quiz. </p> <p>For your information, I have the following database design:</p> <ul> <li><p><strong>Employee</strong> table: <code>Username, Name, Job, DivisionCode</code></p></li> <li><p><strong>Division</strong> table: <code>SapCode, DivisionName</code></p></li> <li><p><strong>Quiz</strong> table: <code>QuizID, Title, Description, IsSent</code></p></li> <li><p><strong>UserQuiz</strong> table: <code>UserQuizID, Score, DateTimeComplete, QuizID, Username</code></p></li> </ul> <p>NOTE: The first attribute in each table is the primary key.</p> <p><code>IsSent</code> is a flag used to determine which quiz is sent to the users and which one is not.</p> <p>So how to modify this query to show the percentage of participation?</p> <p>SQL query:</p> <pre><code>SELECT dbo.Divisions.DivisionShortcut, COUNT(DISTINCT dbo.UserQuiz.Username) AS [Number of Participants], dbo.Quiz.QuizID FROM dbo.Divisions INNER JOIN dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode INNER JOIN dbo.UserQuiz ON dbo.employee.Username = dbo.UserQuiz.Username INNER JOIN dbo.Quiz ON dbo.UserQuiz.QuizID = dbo.Quiz.QuizID WHERE [Quiz].[QuizID] = (SELECT MAX([QuizID]) FROM dbo.Quiz WHERE (IsSent = 1)) GROUP BY dbo.Divisions.DivisionShortcut, dbo.Quiz.QuizID </code></pre> <p>Database Schema:</p> <pre><code>/****** Object: Table [dbo].[Divisions] Script Date: 03/07/2012 15:48:13 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[Divisions]( [SapCode] [float] NOT NULL, [DivisionShortcut] [varchar](10) NOT NULL, [DivisionName] [varchar](max) NOT NULL, CONSTRAINT [PK_Divisions] PRIMARY KEY CLUSTERED ( [SapCode] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO SET ANSI_PADDING OFF GO /****** Object: Table [dbo].[Quiz] Script Date: 03/07/2012 15:48:13 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[Quiz]( [QuizID] [int] IDENTITY(1,1) NOT NULL, [Title] [varchar](max) NOT NULL, [IsSent] [bit] NOT NULL, [Description] [varchar](max) NULL, CONSTRAINT [PK_Quiz] PRIMARY KEY CLUSTERED ( [QuizID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO SET ANSI_PADDING OFF GO /****** Object: Table [dbo].[employee] Script Date: 03/07/2012 15:48:13 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[employee]( [Name] [nvarchar](max) NOT NULL, [Username] [nvarchar](255) NOT NULL, [JobTitle] [nvarchar](max) NOT NULL, [BadgeNo] [float] NOT NULL, [EmpOrgType] [float] NOT NULL, [DivisionCode] [float] NOT NULL, CONSTRAINT [PK_employee] PRIMARY KEY CLUSTERED ( [Username] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO /****** Object: Table [dbo].[UserQuiz] Script Date: 03/07/2012 15:48:13 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[UserQuiz]( [UserQuizID] [int] IDENTITY(1,1) NOT NULL, [QuizID] [int] NOT NULL, [DateTimeComplete] [smalldatetime] NOT NULL, [Score] [float] NOT NULL, [Username] [nvarchar](255) NOT NULL, CONSTRAINT [PK_UserQuiz] PRIMARY KEY CLUSTERED ( [UserQuizID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO /****** Object: Default [DF_Quiz_IsSent] Script Date: 03/07/2012 15:48:13 ******/ ALTER TABLE [dbo].[Quiz] ADD CONSTRAINT [DF_Quiz_IsSent] DEFAULT ((0)) FOR [IsSent] GO /****** Object: ForeignKey [FK_employee_Divisions] Script Date: 03/07/2012 15:48:13 ******/ ALTER TABLE [dbo].[employee] WITH CHECK ADD CONSTRAINT [FK_employee_Divisions] FOREIGN KEY([DivisionCode]) REFERENCES [dbo].[Divisions] ([SapCode]) GO ALTER TABLE [dbo].[employee] CHECK CONSTRAINT [FK_employee_Divisions] GO /****** Object: ForeignKey [FK_UserQuiz_employee] Script Date: 03/07/2012 15:48:13 ******/ ALTER TABLE [dbo].[UserQuiz] WITH CHECK ADD CONSTRAINT [FK_UserQuiz_employee] FOREIGN KEY([Username]) REFERENCES [dbo].[employee] ([Username]) GO ALTER TABLE [dbo].[UserQuiz] CHECK CONSTRAINT [FK_UserQuiz_employee] GO /****** Object: ForeignKey [FK_UserQuiz_Quiz] Script Date: 03/07/2012 15:48:13 ******/ ALTER TABLE [dbo].[UserQuiz] WITH CHECK ADD CONSTRAINT [FK_UserQuiz_Quiz] FOREIGN KEY([QuizID]) REFERENCES [dbo].[Quiz] ([QuizID]) GO ALTER TABLE [dbo].[UserQuiz] CHECK CONSTRAINT [FK_UserQuiz_Quiz] </code></pre>
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