Question

我需要获取具有重复

的行的行ID

Select Name from table1 group by Name having count(1) > 1

表1

ID | Name    | ClientID
----------------------------
01 | John    |  01
02 | Sam     |  01
03 | Sue     |  01
04 | John    |  02
05 | John    |  01

唯一的问题是它只会返回Name而不是列的ID，因为我在同一个表上有多个客户端，并且我不想将其他客户端的名称计为重复项。< / p>

那么有没有办法在表中查找重复数据并返回行的ID，以便我可以在另一个查询中使用这些ID？

回答我修改了

感谢每一个人对我的答案，这是对我标记为答案的答案的修改。

select t1.*
from (select count(*) over (partition by entityname) as cnt ,t1.*
      from table1 t1 where ClientID = 1
     ) t1
where cnt > 1 and ClientID = 1 order by cnt;

Answer 1

使用窗口功能：

select t1.*
from (select t1.*, count(*) over (partition by name) as cnt
      from table1 t1
     ) t1
where cnt > 1;

count(*) over (partition by name)计算每个名称的行数。但是，它通过在每行上附加计数来实现，而不是通过减少行数。这是选择行所需的信息。

Answer 2

Select Name, min(ID) ROWID From table1 Group BY Name Having Count(ID)>1

min（ID）此处将返回第一次ID出现在副本中，而Count（ID）＆gt; 1将过滤掉您有重复项的行。

祝你好运！

Answer 3

查看欺骗的链接

Declare @Yourtable table (ID varchar(25),Name varchar(50),Client_ID varchar(25)) 
Insert into @Yourtable values 
('01','John','01'),
('02','Sam' ,'01'),
('03','Sue' ,'01'),
('04','John','02'),
('05','John','01')

Select A.*
      ,B.Dupes 
 From  @YourTable A
 Cross Apply (Select Dupes=(Select Stuff((Select Distinct ',' + cast(ID as varchar(25)) 
                              From @YourTable 
                              Where ID<>A.ID and Name=A.Name
                              For XML Path ('')),1,1,'')
                            )
              ) B
 Where Dupes is not null

返回

ID  Name    Client_ID   Dupes
01  John    01          04,05
04  John    02          01,05
05  John    01          01,04

Answer 4

您可以像这样查询

;WITH cte_duplicates
AS (SELECT
  id, name, client_id,
  ROW_NUMBER() OVER (PARTITION BY name ORDER BY id) AS rc
FROM @Yourtable)
SELECT
  id, name, client_id
FROM cte_duplicates
WHERE rc > 1

Answer 5

如果您想根据名称和ClientId提交重复项，请使用以下查询。

 ; with cte_1
   as (select *, count(*) over (partition by name,client_id order by ID) as dups
  from table1  ) 
 Select *
 From cte_1
 where dups> 1;

返回具有重复数据的行的id

5 个答案: