我需要将多个相似记录转换为单个记录。 最多可以有10行需要组合。 需要组合的每组行都具有相同的ID。行数据的值是不相关的(实际上将是一个GUID)。 数据看起来是这样的:在sql server中将数据从多个记录转换为单个记录
表A
ID C1 C2 C3
ID1 x x x
ID1 y y y
ID2 y y y
ID2 x x x
ID2 y y y
ID2 y y y
ID3 x x x
ID3 y y y
ID3 y y y
我需要转换到这个结构,只有每个ID只能有一个记录。根据具有相同ID(约10)的记录数可以有N列。
表B
ID C1 C2 C3 C1A C2A C3A C1B C2B C3B
ID1 x x x y y y null null null
ID2 y y y x x x y y y
ID3 x x x y y y y y y
我不能修改表B中的。只需合并或插入它。
我正在使用SQL Server 2008 R2,表A的卷大约有一百万条记录。
任何帮助大大appriciated。
更新:添加真实的表格定义。
这里是表A创建脚本:
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[IntervalPivotTable](
[UID] [uniqueidentifier] NOT NULL,
[ServiceHash] [int] NULL,
[IntervalID] [nvarchar](50) NULL,
[IntervalTypeID] [nvarchar](50) NULL,
[IntervalGroupID] [nvarchar](50) NULL,
[DrivingConditionID] [nvarchar](50) NULL,
CONSTRAINT [PK_IntervalPivotTable] PRIMARY KEY CLUSTERED
(
[UID] 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
ALTER TABLE [dbo].[IntervalPivotTable] ADD CONSTRAINT [DF_IntervalPivotTable_UID] DEFAULT (newid()) FOR [UID]
GO
下面是表B创建脚本: SET ANSI_NULLS ON GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[PivotedIntervals](
[ServiceHash] [int] NULL,
[IntervalID_0] [nvarchar](50) NULL,
[IntervalTypeID_0] [nvarchar](50) NULL,
[IntervalGroupID_0] [nvarchar](50) NULL,
[DrivingConditionID_0] [nvarchar](50) NULL,
[IntervalID_1] [nvarchar](50) NULL,
[IntervalTypeID_1] [nvarchar](50) NULL,
[IntervalGroupID_1] [nvarchar](50) NULL,
[DrivingConditionID_1] [nvarchar](50) NULL,
[IntervalID_2] [nvarchar](50) NULL,
[IntervalTypeID_2] [nvarchar](50) NULL,
[IntervalGroupID_2] [nvarchar](50) NULL,
[DrivingConditionID_2] [nvarchar](50) NULL,
[IntervalID_3] [nvarchar](50) NULL,
[IntervalTypeID_3] [nvarchar](50) NULL,
[IntervalGroupID_3] [nvarchar](50) NULL,
[DrivingConditionID_3] [nvarchar](50) NULL,
[IntervalID_4] [nvarchar](50) NULL,
[IntervalTypeID_4] [nvarchar](50) NULL,
[IntervalGroupID_4] [nvarchar](50) NULL,
[DrivingConditionID_4] [nvarchar](50) NULL,
[IntervalID_5] [nvarchar](50) NULL,
[IntervalTypeID_5] [nvarchar](50) NULL,
[IntervalGroupID_5] [nvarchar](50) NULL,
[DrivingConditionID_5] [nvarchar](50) NULL,
[IntervalID_6] [nvarchar](50) NULL,
[IntervalTypeID_6] [nvarchar](50) NULL,
[IntervalGroupID_6] [nvarchar](50) NULL,
[DrivingConditionID_6] [nvarchar](50) NULL,
[IntervalID_7] [nvarchar](50) NULL,
[IntervalTypeID_7] [nvarchar](50) NULL,
[IntervalGroupID_7] [nvarchar](50) NULL,
[DrivingConditionID_7] [nvarchar](50) NULL,
[IntervalID_8] [nvarchar](50) NULL,
[IntervalTypeID_8] [nvarchar](50) NULL,
[IntervalGroupID_8] [nvarchar](50) NULL,
[DrivingConditionID_8] [nvarchar](50) NULL,
[IntervalID_9] [nvarchar](50) NULL,
[IntervalTypeID_9] [nvarchar](50) NULL,
[IntervalGroupID_9] [nvarchar](50) NULL,
[DrivingConditionID_9] [nvarchar](50) NULL,
[IntervalID_10] [nvarchar](50) NULL,
[IntervalTypeID_10] [nvarchar](50) NULL,
[IntervalGroupID_10] [nvarchar](50) NULL,
[DrivingConditionID_10] [nvarchar](50) NULL
) ON [PRIMARY]
GO
感谢尼古拉的想法,但我得到了以下错误:操作数数据类型uniqueidentifier对于最小操作符无效。 – sreeli 2012-03-18 02:33:42
尝试在旋转之前将其转换为varchar。 – 2012-03-18 02:47:50
@sreeli - 您是否尝试在转换过程中将guid转换为varchar,并在转换后将其转换回guid? – 2012-03-18 19:44:04