sql - このクエリで部門名を表示するにはどうすればよいですか?

Question

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

score 2 · Accepted Answer

これは、あなたが探していると思われるクエリです。まず、ユーザーと質問をクロス結合します。これで、2 つの組み合わせのすべてが可能になったので、一致する回答のカウントを開始できます。

編集: 0 をカウントできるように、join を answer から cross join に変更しました。

SELECT 
       dbo.[user].department, 
       dbo.question.q_text, 
       dbo.question.sub_q_text, 
       dbo.answer.text, 
       COUNT(qa.answer_id) AS Users_Answered
  FROM [user]
 CROSS JOIN question
 CROSS JOIN answer
  LEFT JOIN alll
    ON [user].User_ID = alll.User_ID
  LEFT JOIN qa
    ON alll.qa_id = qa.aq_id
   AND question.q_id = qa.q_id
   AND qa.answer_id = answer.answer_id
 GROUP BY      
       dbo.[user].department, 
       dbo.question.q_text, 
       dbo.question.sub_q_text, 
       dbo.answer.text
 ORDER BY 1, 2

@ Sql Fiddle で確認できます。

クエリ @ Sql Fiddle の新しいバージョン。

sql - このクエリで部門名を表示するにはどうすればよいですか?

1 に答える 1

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