Question

在我选择的结果中，我看到两行都可以，但我想查看所有列，如：

'Anne','Bauer','m1'
'Thomas','Neben','m3'

If (OBJECT_ID('tempdb..##test') Is Not Null)
   Begin
      Drop Table ##test
   End

CREATE TABLE ##test (
    givenname varchar(50), 
    surname varchar(50), 
    rann varchar(50)
);


INSERT INTO ##test VALUES ('Anne','Bauer','m1');
INSERT INTO ##test VALUES ('Klaus','Griebe','m2');
INSERT INTO ##test VALUES ('Thomas','Neben','m2');
INSERT INTO ##test VALUES ('Thomas','Neben','m3');

SELECT count(rann) as coun, rann  
FROM ##test
group by rann
having count(rann) = 1
  order by coun desc

Answer 1

您可以尝试以下方法：

select givenname,surname,rann from (
select *,count(*) over (partition by rann) rn from ##test
)t where rn=1

Answer 2

只使用带计数的分区

   Select count(rann) over (partition by rann) [count], rann from ##test

如何显示带有计数的所有列？

2 个答案: