如何获得在SQL Server

Question

我也有类似的表行，各组与最低订购组和特别的名字这

CREATE TABLE [dbo].[Test](
    [Name] [NCHAR](10) NULL, 
    [GroupId] [INT] NULL, 
    [GroupOrder] [INT] NULL 
    ) 

及以下值

INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('A',1,1) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('A-1',1,2) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('B',2,1) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('B',2,2) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('B-1',2,3) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('C',3,1) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('C-1',3,2) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('C-1',3,3) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('D',4,1) 
INSERT INTO [dbo].[Test]([Name],[GroupId],[GroupOrder]) VALUES ('D',4,2) 

我需要这样的输出：行在具有最小订单组和名称字段的每个组中包含“-1”

Name GroupId GroupOrder 
    A-1   1 2 
    C-1   3 2 
    B-1   2 3 

Answer 1

您可以使用此

Select * from 
(
select *,Row_Number() Over(Partition by GroupId Order by GroupOrder asc) as rn 
From yourtable 
Where Name like '%-1%' 
) a 
Where rn = 1 

Answer 2

使用ROW_NUMBER窗口函数

Select * from 
(
select *,Row_Number() Over(Partition by Name Order by GroupOrder asc) as rn 
From yourtable 
Where rtrim(Name) like '[A-Z]-1' 
) a 
Where rn = 1 

如果Name应-1结束，然后使用Where Name like '%-1'。如果Name只包含-1然后Where Name like '%-1%'

Answer 3

CREATE TABLE [dbo].[#Test](
    [Name] [NCHAR](10) NULL, 
    [GroupId] [INT] NULL, 
    [GroupOrder] [INT] NULL 
    ) 


INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('A',1,1) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('A-1',1,2) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('B',2,1) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('B',2,2) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('B-1',2,3) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('C',3,1) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('C-1',3,2) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('C-1',3,3) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('D',4,1) 
INSERT INTO [dbo].[#Test]([Name],[GroupId],[GroupOrder]) VALUES ('D',4,2) 

select * from #Test 

Select * from 
(
select *,Row_Number() Over(Partition by Name Order by GroupOrder asc) as rn 
From #Test 
Where Name like '%[-1]%' 
) a 
Where rn = 1 
ORDER BY GroupOrder 

输出

Name GroupId GroupOrder 
A-1   1 2 
B-1   2 3  
C-1   3 2 

Answer 4

你可以使用charindex，top 1 with ties，并row_number

select Top (1) with ties 
     * 
from Test t 
where charindex('-1', t.Name) > 0 
order by row_number() over(partition by t.GroupId order by t.GroupOrder) 

演示链接：http://rextester.com/RBBKX12749