Select distinct rows only and also remove the distinct rows tied with anyother records.

Question

HI Team,
I need query on below requirment:
In my table any value comes with UN in one field alone, i need to select that row. but UN value comes with anyother row i want to reject that UN row.
For example:
EmployeeID
Name
Speciality
1
John
UN
1
John
KH
2
Mony
UN
3
Kash
UN
3
Kash
UI
I need a Final result
1 John KH
2 Mony UN
3 Kash UI. Need to reject UN value combined with anyother row aand also If any row comes with UN value alone need to incude resultset.

Answer 1

One more option:
declare @tabl table(EmployeeID int,Name varchar(10),Speciality varchar(10));
insert into @tabl values
(1 ,'John','UN'),
(1 ,'John','KH'),
(2 ,'Mony','UN'),
(3 ,'Kash','UN'),
(3 ,'Kash','UI'),
(4 ,'Cat','UN'),
(4 ,'Cat','UT');
with cte as (SELECT *,
count(case when Speciality ='UN' then NULL else 1 end) OVER (PARTITION BY EMployeeID,Name,Speciality ) AS RN1,
count(case when Speciality ='UN' then NULL else 1 end) OVER (PARTITION BY EMployeeID,Name ) as rn2
FROM @tabl)
select EmployeeID,Name,Speciality from cte where RN1=rn2