字段中相同数据的区分开,求相同数据的第一条
CREATE TABLE [dbo].[Wound](
[WoundID] [int] IDENTITY(1,1) NOT NULL,
[Winding] [varchar](50) NULL,
[TF_ID] [int] NULL,
CONSTRAINT [PK_Wound] PRIMARY KEY CLUSTERED
(
[WoundID] 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
insert into Wound values('NP1',1)
insert into Wound values('NP1',1)
insert into Wound values('NP2',1)
insert into Wound values('NP3',1)
insert into Wound values('NP2',1)
insert into Wound values('NP3',2)
insert into Wound values('NP3',2)
insert into Wound values('NP1',2)
insert into Wound values('NP1',2)
select * from Wound T
where not exists (select 1 from Wound where T.[Winding]=[Winding] and T.[TF_ID]=[TF_ID] And T.[WoundID]>[WoundID] )
