pivot-行转列示例1

Posted 2020-10-17

USE [ExampleDb]
GO
/****** Object:  Table [dbo].[SalesInfo1]    Script Date: 2017/12/16 13:38:19 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[SalesInfo1](
    [Make] [nvarchar](50) NOT NULL CONSTRAINT [DF_SalesInfo_Make]  DEFAULT (‘‘),
    [Year] [int] NOT NULL CONSTRAINT [DF_SalesInfo_Year]  DEFAULT ((0)),
    [Sales] [int] NOT NULL CONSTRAINT [DF_SalesInfo_Sales]  DEFAULT ((0)),
    [Id] [int] IDENTITY(1,1) NOT NULL,
 CONSTRAINT [PK_SalesInfo] 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].[SalesInfo1] ON 

INSERT [dbo].[SalesInfo1] ([Make], [Year], [Sales], [Id]) VALUES (N‘Honda‘, 1990, 2000, 1)
INSERT [dbo].[SalesInfo1] ([Make], [Year], [Sales], [Id]) VALUES (N‘Honda‘, 1990, 1000, 2)
INSERT [dbo].[SalesInfo1] ([Make], [Year], [Sales], [Id]) VALUES (N‘Acura‘, 1990, 500, 3)
INSERT [dbo].[SalesInfo1] ([Make], [Year], [Sales], [Id]) VALUES (N‘Honda‘, 1991, 3000, 4)
INSERT [dbo].[SalesInfo1] ([Make], [Year], [Sales], [Id]) VALUES (N‘Acura‘, 1991, 300, 5)
INSERT [dbo].[SalesInfo1] ([Make], [Year], [Sales], [Id]) VALUES (N‘Acura‘, 1991, 600, 6)
INSERT [dbo].[SalesInfo1] ([Make], [Year], [Sales], [Id]) VALUES (N‘Acura‘, 1991, 800, 7)
SET IDENTITY_INSERT [dbo].[SalesInfo1] OFF
--------------------------------------------------------------------------------------------

select  [Make] ,
        [Year] ,
        [Sales] ,
        [Id]
from    [ExampleDb].[dbo].[SalesInfo1]; 

---------------------------------------------------------------------------------------------
--Step 1
select  t.Make ,
        [1990] ,
        [1991]
from    dbo.SalesInfo1 pivot ( sum(Sales) for Year in ( [1990], [1991] ) ) t;

--Step 2
select  tmp.Make ,
        sum(tmp.[1990]) [1990] ,
        sum(tmp.[1991]) [1991]
from    ( select    t.Make ,
                    [1990] ,
                    [1991]
          from      dbo.SalesInfo1 pivot ( sum(Sales) for Year in ( [1990],
                                                              [1991] ) ) t
        ) tmp
group by tmp.Make;
     
---------------------------------------------------------------------------------------------

select  *
from    ( select    Make ,
                    Year ,
                    Sales
          from      dbo.SalesInfo1
        ) tmp pivot ( sum(Sales) for Year in ( [1990], [1991] ) ) t;


--复制表
select  [Make] ,
        [Year] ,
        [Sales]
into    [ExampleDb].[dbo].SalesInfo2
from    [ExampleDb].[dbo].SalesInfo1;


--Step 1
select  t.Make ,
        [1990] ,
        [1991]
from    dbo.SalesInfo2 pivot ( sum(Sales) for Year in ( [1990], [1991] ) ) t;