Simple query... but couldn't get it

Question

CREATE TABLE person_del
DNO VARCHAR2(5),
place VARCHAR2(10),
Got VARCHAR2(10)
commit;
insert into person_del values('1','home','Y')
insert into person_del values('1','office','N')
insert into person_del values('1','other','Y')
insert into person_del values('2','office','Y')
insert into person_del values('3', 'home', 'N')
insert into person_del values('3', 'office', 'Y')
insert into person_del values('4', 'other', 'N')
insert into person_del values('5', 'home', 'Y')
insert into person_del values('6', 'home', 'N')
insert into person_del values('6', 'office', 'N')
insert into person_del values('7', 'home', 'Y')
insert into person_del values('7', 'office', 'Y')
commit;
select * from person_del
select dno,place,got,
case when got='Y' then 'Y'
else null
end as "won"
from person_del
where place in ('home','office')
I ran the above query, but the result is not what I wanted
The requirement is as described below:
List Y in a new column "won" for those dno's who achieved the place - either home or office
If GOT=Y for place home and GOT=N for place office, then display only that column where GOT=Y
If GOT=N for place home and GOT=Y for place office, then display only that column where GOT=Y
If both are N then list any one of the column
If both are Y then list any one fo the column
The place other is not taken into account
The output should be dno and won column
I know this is simple...but i couldn't get it and I need it in few mins
Can someone help me on this using CASE statement or something that isn't tricky to understand ASAP ?
Basically, the output for this one should be as follows:
dno won
1 Y
2 Y
3 Y
5 Y
6 N
7 Y

Answer 1

Guess you'll have to fiddle a bit with the possible combinations:
SQL> select dno
  2  ,      got won
  3  from ( select dno
  4         ,      got
  5         ,      row_number() over (partition by dno, got order by dno, got desc) cnt
  6         ,      count(*) over (partition by dno order by dno) cnt2      
  7         from   person_del t
  8         where  t.place in ('home', 'office')
  9       )
10  where ( case
11            when got = 'Y' and cnt = 1 then 1
12            when got = 'N' and cnt = cnt2 then 1
13          end
14        ) = 1
15  order by to_number(dno);
DNO   WON
1     Y
2     Y
3     Y
5     Y
6     N
7     Y
10    N
7 rows selected.I went for a CASE approach in order to show you that you can use it in your predicate (WHERE-clause) as well.
Solomon's solution is more concise, elegant and problably more performant as well ( and a sign for me to stop playing with queries after midnight ;) ).