SQL数据透视和函数

Question

USE [WPF]
GO
/****** Object:  Table [dbo].[Issue]    Script Date: 17/04/2017 4:45:16 PM ******/
CREATE TABLE [dbo].[Issue](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [ProjectID] [int] NULL,
    [Drawing ID] [int] NULL,
    [Revision ID] [int] NULL,
    [Issue Number] [int] NULL,
 CONSTRAINT [PK_DrawingIssue] 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:  Table [dbo].[Register]    Script Date: 17/04/2017 4:45:16 PM ******/
CREATE TABLE [dbo].[Register](
    [ID] [int] NOT NULL,
    [ProjectID] [int] NULL,
    [Number] [nvarchar](255) NULL,
 CONSTRAINT [PK_Drawing_Register] 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:  Table [dbo].[Revision]    Script Date: 17/04/2017 4:45:16 PM ******/
CREATE TABLE [dbo].[Revision](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [ProjectID] [int] NULL,
    [Drawing ID] [int] NULL,
    [Revision] [nvarchar](255) NULL,
 CONSTRAINT [PK_DrawingRevision] 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
SET IDENTITY_INSERT [dbo].[Issue] ON 

GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (9, 23, 3, 5, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (10, 23, 4, 6, 9)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (19, 23, 7, 12, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (164, 23, 12, 61, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (165, 23, 13, 62, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (167, 23, 13, 62, 0)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (168, 23, 13, 62, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (169, 23, 13, 64, 0)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (170, 23, 13, 64, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (171, 23, 13, 64, 3)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (254, 23, 5, 86, 4)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (256, 23, 13, 88, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (257, 23, 13, 89, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (258, 23, 13, 64, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (259, 23, 16, 91, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (260, 23, 16, 91, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (297, 2, 17, 108, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (298, 2, 17, 108, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (299, 2, 17, 108, 6)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (300, 2, 17, 109, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (301, 2, 17, 109, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (302, 2, 17, 109, 3)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (303, 2, 17, 110, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (304, 2, 17, 110, 2)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (305, 2, 17, 110, 7)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (306, 2, 17, 110, 8)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (307, 2, 17, 110, 6)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (308, 23, 18, 111, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (309, 23, 19, 112, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (310, 23, 20, 113, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (311, 23, 21, 114, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (312, 23, 22, 115, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (313, 23, 23, 116, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (314, 23, 24, 117, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (315, 23, 25, 118, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (316, 23, 26, 119, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (317, 23, 27, 120, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (318, 23, 28, 121, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (319, 23, 29, 122, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (320, 23, 30, 123, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (321, 26, 31, 124, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (322, 26, 32, 125, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (323, 26, 33, 126, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (324, 26, 34, 127, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (325, 26, 35, 128, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (326, 2, 36, 129, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (327, 26, 37, 130, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (328, 2, 38, 131, 1)
GO
INSERT [dbo].[Issue] ([ID], [ProjectID], [Drawing ID], [Revision ID], [Issue Number]) VALUES (329, 23, 39, 132, 1)
GO
SET IDENTITY_INSERT [dbo].[Issue] OFF
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (3, 23, N'1')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (4, 23, N'7')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (7, 23, N'3333')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (12, 23, N'D1')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (13, 23, N'DT1')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (16, 23, N'Dwg1')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (17, 2, N'D1')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (18, 23, N'23')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (19, 23, N'983')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (20, 23, N'100')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (21, 23, N'11112')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (22, 23, N'555')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (23, 23, N'666666')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (24, 23, N'77')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (25, 23, N'88')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (26, 23, N'99')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (27, 23, N'2')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (28, 23, N'3')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (29, 23, N'4')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (30, 23, N'Dwg12345')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (31, 26, N'1')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (32, 26, N'2')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (33, 26, N'3')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (34, 26, N'4')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (35, 26, N'5')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (36, 2, N'DT123')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (37, 26, N'DTApr04')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (38, 2, N'DTApr05')
GO
INSERT [dbo].[Register] ([ID], [ProjectID], [Number]) VALUES (39, 23, N'DTA05')
GO
SET IDENTITY_INSERT [dbo].[Revision] ON 

GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (5, 23, 3, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (6, 23, 4, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (12, 23, 7, N'3')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (61, 23, 12, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (62, 23, 13, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (64, 23, 13, N'1')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (88, 23, 13, N'1')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (89, 23, 13, N'2')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (90, 23, 13, N'1')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (91, 23, 16, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (108, 2, 17, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (109, 2, 17, N'1')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (110, 2, 17, N'2')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (111, 23, 18, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (112, 23, 19, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (113, 23, 20, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (114, 23, 21, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (115, 23, 22, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (116, 23, 23, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (117, 23, 24, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (118, 23, 25, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (119, 23, 26, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (120, 23, 27, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (121, 23, 28, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (122, 23, 29, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (123, 23, 30, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (124, 26, 31, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (125, 26, 32, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (126, 26, 33, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (127, 26, 34, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (128, 26, 35, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (129, 2, 36, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (130, 26, 37, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (131, 2, 38, N'0')
GO
INSERT [dbo].[Revision] ([ID], [ProjectID], [Drawing ID], [Revision]) VALUES (132, 23, 39, N'0')
GO
SET IDENTITY_INSERT [dbo].[Revision] OFF
GO

我有3个表作为注册，修订，问题我需要最新的4个问题，按照问题ID的顺序排序，修订版ID我已经成功地进行了如下查询，

SELECT 
[DrawingID],
[RevisionID],
[IssueID],
Number,
[Revision],
[Issue Number],          
               'Issue' + Cast(rn AS CHAR(10)) AS Issue 
        FROM   (
SELECT dwgReg.Number,
dwgRev.Revision,
dwgIssue.[Issue Number],
dwgReg.ID as DrawingID,
dwgRev.ID as RevisionID,
dwgIssue.ID as IssueID,                            
                       Row_number() 
                         OVER ( 
                           partition BY dwgIssue.[Drawing ID] 
                           ORDER BY dwgReg.[ID], dwgRev.[Revision] 
                         DESC, dwgIssue.[Issue Number] DESC) 
                               AS rn 
                FROM   Issue dwgIssue 
                       INNER JOIN Register dwgReg
                               ON dwgIssue.[Drawing ID]=dwgReg.ID
                       INNER JOIN Revision dwgRev
                               ON dwgRev.ID=dwgIssue.[Revision ID]
                                  AND dwgRev.[Drawing ID]=dwgReg.ID)dwgIssue
                                  where rn<=4

我只需要借助SQL函数来转动这个查询，结果需要像，

DrawingID Number Issue1 Issue2 Issue3 Issue4

每个图纸最多有4行，最少1行。 请一些人帮我解决一下。

Answer 1

我只会使用条件聚合。以下是针对这些问题的方法：

select i.drawingid,
       max(case when seqnum = 1 then id end) as issueid_1,
       max(case when seqnum = 2 then id end) as issueid_2,
       max(case when seqnum = 3 then id end) as issueid_3,
       max(case when seqnum = 4 then id end) as issueid_4
from (select i.*,
             row_number() over (partition by i.drawingid order by i.revisionid desc) as seqnum
      from issue i
     ) i
group by i.drawingid;

其余的只是加入你想要的其他列。

Answer 2

USE TestDB GO

WITH CTE

      AS ( SELECT   [Drawing ID] ,
                    MAX(CASE WHEN IssueCount = 1 THEN ID
                        END) AS Issue_1 ,
                    MAX(CASE WHEN IssueCount = 2 THEN ID    
                        END) AS Issue_2 ,
                    MAX(CASE WHEN IssueCount = 3 THEN ID
                        END) AS issue_3 ,
                    MAX(CASE WHEN IssueCount = 4 THEN ID
                        END) AS issue_4
           FROM     ( SELECT    ID ,
                                ProjectID ,
                                [Drawing ID] ,
                                [Revision ID] ,
                                [Issue Number] ,
                                ROW_NUMBER() OVER ( PARTITION BY [Drawing ID] ORDER BY [Revision ID] DESC ) AS IssueCount
                      FROM      dbo.ISSUE (NOLOCK)
                    ) i
           GROUP BY [Drawing ID]
         )
SELECT  [Drawing ID] ,
        Issue_1 ,
        Issue_2 ,
        issue_3 ,
        issue_4
FROM    CTE