Selecting the second row of a table using rownum

Question

I have tried the below query:

select empno from (
                   select empno 
                     from emp
                    order by sal desc
               


        

Answer 1

Select * From (SELECT *,
  ROW_NUMBER() OVER(ORDER BY column_name  DESC) AS mRow

FROM table_name 

WHERE condition) as TT
Where TT.mRow=2;

Answer 2

You can use RANK or DENSE_RANK to achieve what you are trying to achieve here.

Answer 3

To explain this behaviour, we need to understand how Oracle processes ROWNUM. When assigning ROWNUM to a row, Oracle starts at 1 and only increments the value when a row is selected; that is, when all conditions in the WHERE clause are met. Since our condition requires that ROWNUM is greater than 2, no rows are selected and ROWNUM is never incremented beyond 1.

The bottom line is that conditions such as the following will work as expected.

.. WHERE rownum = 1;

.. WHERE rownum <= 10;

While queries with these conditions will always return zero rows.

.. WHERE rownum = 2;

.. WHERE rownum > 10;

Quoted from Understanding Oracle rownum

You should modify you query in this way in order to work:

select empno
from
    (
    select empno, rownum as rn 
    from (
          select empno
          from emp
          order by sal desc
          )
    )
where rn=2;

EDIT: I've corrected the query to get the rownum after the order by sal desc

Answer 4

select empno from(
select empno,rownum as rum
from emp,
order by sal desc
)
where rum=2;

Answer 5

Select Second Row From a Table in Oracle

SELECT *
FROM (SELECT * FROM emp ORDER BY rownum DESC)
WHERE rownum=1

Answer 6

try this way it's working 100% SQL> SELECT * FROM STUD;

RNUMBER SNAME MARKS

---

   104 mahesh                       85
   101 DHANU                        20
   102 BHARATH                      10
   100 RAJ                          50
   103 GOPI                         65

SQL> select * from(select MARKS,ROWNUM AS RS from ( select * from stud order by marks desc)) where RS=2;

 MARKS         RS

---

    65          2

SQL>