Starスキーマに関して、次のデータベース設計があります。
alll table: ID, user_id, cat_id, qa_id
user table: user_id, name, department
category table: cat_id, cat_text, sub_cat_text
QA table: aq_id, q_id, answer_id
question table: q_id, q_text, sub_q_text
answer table: answer_id, text
これらの回答のいずれにも参加者がいない場合でも、サブ質問を含む各質問の参加者の総数とすべての回答を示すクエリを考え出す必要があります。幸いなことに、質問、サブ質問、各回答の参加者の総数を示すクエリを思いつくことができました。ただし、現在の問題は、部門を表示することです。いずれかの回答に参加者がいない場合、部門は NULL として表示されます。では、これをどのように変更しますか？
私のクエリ:
SELECT dbo.question.q_text, dbo.question.sub_q_text, COUNT(dbo.[user].user_id) AS Expr1, dbo.answer.text, dbo.[user].department
FROM dbo.alll INNER JOIN
dbo.category ON dbo.alll.cat_id = dbo.category.cat_id INNER JOIN
dbo.QA ON dbo.alll.qa_id = dbo.QA.aq_id INNER JOIN
dbo.[user] ON dbo.alll.user_id = dbo.[user].user_id INNER JOIN
dbo.question ON dbo.QA.q_id = dbo.question.q_id RIGHT OUTER JOIN
dbo.answer ON dbo.QA.answer_id = dbo.answer.answer_id
WHERE (dbo.[user].department = 'pmod') AND (dbo.question.q_text = 'q1') OR
(dbo.[user].department IS NULL)
GROUP BY dbo.answer.text, dbo.question.q_text, dbo.question.sub_q_text, dbo.[user].department
データベースのスクリプトは次のとおりです。
USE [master]
GO
/****** Object: Database [survey2] Script Date: 05/22/2012 13:18:16 ******/
CREATE DATABASE [survey2] ON PRIMARY
( NAME = N'survey2', FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS\MSSQL\DATA\survey2.mdf' , SIZE = 2048KB , MAXSIZE = UNLIMITED, FILEGROWTH = 1024KB )
LOG ON
( NAME = N'survey2_log', FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10_50.SQLEXPRESS\MSSQL\DATA\survey2_log.ldf' , SIZE = 1024KB , MAXSIZE = 2048GB , FILEGROWTH = 10%)
GO
ALTER DATABASE [survey2] SET COMPATIBILITY_LEVEL = 100
GO
IF (1 = FULLTEXTSERVICEPROPERTY('IsFullTextInstalled'))
begin
EXEC [survey2].[dbo].[sp_fulltext_database] @action = 'enable'
end
GO
ALTER DATABASE [survey2] SET ANSI_NULL_DEFAULT OFF
GO
ALTER DATABASE [survey2] SET ANSI_NULLS OFF
GO
ALTER DATABASE [survey2] SET ANSI_PADDING OFF
GO
ALTER DATABASE [survey2] SET ANSI_WARNINGS OFF
GO
ALTER DATABASE [survey2] SET ARITHABORT OFF
GO
ALTER DATABASE [survey2] SET AUTO_CLOSE OFF
GO
ALTER DATABASE [survey2] SET AUTO_CREATE_STATISTICS ON
GO
ALTER DATABASE [survey2] SET AUTO_SHRINK OFF
GO
ALTER DATABASE [survey2] SET AUTO_UPDATE_STATISTICS ON
GO
ALTER DATABASE [survey2] SET CURSOR_CLOSE_ON_COMMIT OFF
GO
ALTER DATABASE [survey2] SET CURSOR_DEFAULT GLOBAL
GO
ALTER DATABASE [survey2] SET CONCAT_NULL_YIELDS_NULL OFF
GO
ALTER DATABASE [survey2] SET NUMERIC_ROUNDABORT OFF
GO
ALTER DATABASE [survey2] SET QUOTED_IDENTIFIER OFF
GO
ALTER DATABASE [survey2] SET RECURSIVE_TRIGGERS OFF
GO
ALTER DATABASE [survey2] SET DISABLE_BROKER
GO
ALTER DATABASE [survey2] SET AUTO_UPDATE_STATISTICS_ASYNC OFF
GO
ALTER DATABASE [survey2] SET DATE_CORRELATION_OPTIMIZATION OFF
GO
ALTER DATABASE [survey2] SET TRUSTWORTHY OFF
GO
ALTER DATABASE [survey2] SET ALLOW_SNAPSHOT_ISOLATION OFF
GO
ALTER DATABASE [survey2] SET PARAMETERIZATION SIMPLE
GO
ALTER DATABASE [survey2] SET READ_COMMITTED_SNAPSHOT OFF
GO
ALTER DATABASE [survey2] SET HONOR_BROKER_PRIORITY OFF
GO
ALTER DATABASE [survey2] SET READ_WRITE
GO
ALTER DATABASE [survey2] SET RECOVERY SIMPLE
GO
ALTER DATABASE [survey2] SET MULTI_USER
GO
ALTER DATABASE [survey2] SET PAGE_VERIFY CHECKSUM
GO
ALTER DATABASE [survey2] SET DB_CHAINING OFF
GO
USE [survey2]
GO
/****** Object: Table [dbo].[category] Script Date: 05/22/2012 13:18:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[category](
[cat_id] [int] IDENTITY(1,1) NOT NULL,
[cat_text] [varchar](50) NOT NULL,
[sub_cat_text] [varchar](50) NULL,
CONSTRAINT [PK_category] PRIMARY KEY CLUSTERED
(
[cat_id] 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].[answer] Script Date: 05/22/2012 13:18:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[answer](
[answer_id] [int] IDENTITY(1,1) NOT NULL,
[text] [varchar](50) NOT NULL,
CONSTRAINT [PK_answer] PRIMARY KEY CLUSTERED
(
[answer_id] 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].[user] Script Date: 05/22/2012 13:18:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[user](
[user_id] [int] IDENTITY(1,1) NOT NULL,
[name] [varchar](50) NOT NULL,
[department] [varchar](50) NOT NULL,
CONSTRAINT [PK_user] PRIMARY KEY CLUSTERED
(
[user_id] 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].[question] Script Date: 05/22/2012 13:18:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[question](
[q_id] [int] IDENTITY(1,1) NOT NULL,
[q_text] [varchar](50) NOT NULL,
[sub_q_text] [varchar](50) NULL,
CONSTRAINT [PK_question] PRIMARY KEY CLUSTERED
(
[q_id] 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].[QA] Script Date: 05/22/2012 13:18:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[QA](
[aq_id] [int] IDENTITY(1,1) NOT NULL,
[q_id] [int] NOT NULL,
[answer_id] [int] NOT NULL,
CONSTRAINT [PK_QA] PRIMARY KEY CLUSTERED
(
[aq_id] 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].[alll] Script Date: 05/22/2012 13:18:17 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[alll](
[ID] [int] IDENTITY(1,1) NOT NULL,
[user_id] [int] NULL,
[cat_id] [int] NULL,
[qa_id] [int] NULL,
CONSTRAINT [PK_alll] PRIMARY KEY CLUSTERED
(
[ID] 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: View [dbo].[showing number of participants in each Q] Script Date: 05/22/2012 13:18:18 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE VIEW [dbo].[showing number of participants in each Q]
AS
SELECT COUNT(dbo.question.q_id) AS Expr1, dbo.[user].department, dbo.category.cat_text, dbo.category.sub_cat_text, dbo.question.q_text
FROM dbo.alll INNER JOIN
dbo.answer ON dbo.alll.answer_id = dbo.answer.answer_id INNER JOIN
dbo.category ON dbo.alll.cat_id = dbo.category.cat_id INNER JOIN
dbo.question ON dbo.alll.q_id = dbo.question.q_id INNER JOIN
dbo.[user] ON dbo.alll.user_id = dbo.[user].user_id
GROUP BY dbo.[user].department, dbo.category.cat_text, dbo.category.sub_cat_text, dbo.question.q_text
GO
EXEC sys.sp_addextendedproperty @name=N'MS_DiagramPane1', @value=N'[0E232FF0-B466-11cf-A24F-00AA00A3EFFF, 1.00]
Begin DesignProperties =
Begin PaneConfigurations =
Begin PaneConfiguration = 0
NumPanes = 4
Configuration = "(H (1[40] 4[20] 2[20] 3) )"
End
Begin PaneConfiguration = 1
NumPanes = 3
Configuration = "(H (1 [50] 4 [25] 3))"
End
Begin PaneConfiguration = 2
NumPanes = 3
Configuration = "(H (1 [50] 2 [25] 3))"
End
Begin PaneConfiguration = 3
NumPanes = 3
Configuration = "(H (4 [30] 2 [40] 3))"
End
Begin PaneConfiguration = 4
NumPanes = 2
Configuration = "(H (1 [56] 3))"
End
Begin PaneConfiguration = 5
NumPanes = 2
Configuration = "(H (2 [66] 3))"
End
Begin PaneConfiguration = 6
NumPanes = 2
Configuration = "(H (4 [50] 3))"
End
Begin PaneConfiguration = 7
NumPanes = 1
Configuration = "(V (3))"
End
Begin PaneConfiguration = 8
NumPanes = 3
Configuration = "(H (1[56] 4[18] 2) )"
End
Begin PaneConfiguration = 9
NumPanes = 2
Configuration = "(H (1 [75] 4))"
End
Begin PaneConfiguration = 10
NumPanes = 2
Configuration = "(H (1[66] 2) )"
End
Begin PaneConfiguration = 11
NumPanes = 2
Configuration = "(H (4 [60] 2))"
End
Begin PaneConfiguration = 12
NumPanes = 1
Configuration = "(H (1) )"
End
Begin PaneConfiguration = 13
NumPanes = 1
Configuration = "(V (4))"
End
Begin PaneConfiguration = 14
NumPanes = 1
Configuration = "(V (2))"
End
ActivePaneConfig = 0
End
Begin DiagramPane =
Begin Origin =
Top = 0
Left = 0
End
Begin Tables =
Begin Table = "alll"
Begin Extent =
Top = 61
Left = 226
Bottom = 178
Right = 386
End
DisplayFlags = 280
TopColumn = 0
End
Begin Table = "answer"
Begin Extent =
Top = 182
Left = 0
Bottom = 269
Right = 160
End
DisplayFlags = 280
TopColumn = 0
End
Begin Table = "category"
Begin Extent =
Top = 36
Left = 426
Bottom = 138
Right = 586
End
DisplayFlags = 280
TopColumn = 0
End
Begin Table = "question"
Begin Extent =
Top = 189
Left = 427
Bottom = 291
Right = 587
End
DisplayFlags = 280
TopColumn = 0
End
Begin Table = "user"
Begin Extent =
Top = 45
Left = 0
Bottom = 147
Right = 160
End
DisplayFlags = 280
TopColumn = 0
End
End
End
Begin SQLPane =
End
Begin DataPane =
Begin ParameterDefaults = ""
End
Begin ColumnWidths = 9
Width = 284
Width = 2265
Width = 1500
Width = 1500
Width = 1500
Width = 1500
Width = 1500
Width = 1500
Width = 1500
End
End
Begin CriteriaPane =
Begin ColumnWidths = 12
Column = 1440
Alias = 900
Table' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'VIEW',@level1name=N'showing number of participants in each Q'
GO
EXEC sys.sp_addextendedproperty @name=N'MS_DiagramPane2', @value=N' = 1170
Output = 720
Append = 1400
NewValue = 1170
SortType = 1350
SortOrder = 1410
GroupBy = 1350
Filter = 1350
Or = 1350
Or = 1350
Or = 1350
End
End
End
' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'VIEW',@level1name=N'showing number of participants in each Q'
GO
EXEC sys.sp_addextendedproperty @name=N'MS_DiagramPaneCount', @value=2 , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'VIEW',@level1name=N'showing number of participants in each Q'
GO
/****** Object: ForeignKey [FK_QA_answer] Script Date: 05/22/2012 13:18:17 ******/
ALTER TABLE [dbo].[QA] WITH CHECK ADD CONSTRAINT [FK_QA_answer] FOREIGN KEY([answer_id])
REFERENCES [dbo].[answer] ([answer_id])
GO
ALTER TABLE [dbo].[QA] CHECK CONSTRAINT [FK_QA_answer]
GO
/****** Object: ForeignKey [FK_QA_question] Script Date: 05/22/2012 13:18:17 ******/
ALTER TABLE [dbo].[QA] WITH CHECK ADD CONSTRAINT [FK_QA_question] FOREIGN KEY([q_id])
REFERENCES [dbo].[question] ([q_id])
GO
ALTER TABLE [dbo].[QA] CHECK CONSTRAINT [FK_QA_question]
GO
/****** Object: ForeignKey [FK_alll_category] Script Date: 05/22/2012 13:18:17 ******/
ALTER TABLE [dbo].[alll] WITH CHECK ADD CONSTRAINT [FK_alll_category] FOREIGN KEY([cat_id])
REFERENCES [dbo].[category] ([cat_id])
GO
ALTER TABLE [dbo].[alll] CHECK CONSTRAINT [FK_alll_category]
GO
/****** Object: ForeignKey [FK_alll_QA] Script Date: 05/22/2012 13:18:17 ******/
ALTER TABLE [dbo].[alll] WITH CHECK ADD CONSTRAINT [FK_alll_QA] FOREIGN KEY([qa_id])
REFERENCES [dbo].[QA] ([aq_id])
GO
ALTER TABLE [dbo].[alll] CHECK CONSTRAINT [FK_alll_QA]
GO
/****** Object: ForeignKey [FK_alll_user] Script Date: 05/22/2012 13:18:17 ******/
ALTER TABLE [dbo].[alll] WITH CHECK ADD CONSTRAINT [FK_alll_user] FOREIGN KEY([user_id])
REFERENCES [dbo].[user] ([user_id])
GO
ALTER TABLE [dbo].[alll] CHECK CONSTRAINT [FK_alll_user]
GO