Row Number In oracle - oracle

Question

I want to fetch data based on the last row number.
I want the records highlighted in yellow color. Please guide.

Answer 1

Should be a simple MAX function.
select max(row_number) rn,
account_no
from your_table
group by account_no
order by account_no;
If "row_number" represents the result of analytic function (which isn't clear from what you posted so far), then include ORDER BY clause into the function (I don't know which column you're sorting data on) in descending order so that your "max" actually becomes "min" whose RN = 1 and then it is easy to select it as a final result.
with temp as
(select columnb,
columnc,
row_number() over (partition by accountno order by SOMETHING desc) rn
^^^^^^^^^^^^^^^^^^^^^^^
add this
from some_table
)
select columnb,
columnc
from temp
where rn = 1
As I don't have your tables, here's Scott's EMP:
SQL> select * from emp;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- -------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17.12.80 920 20
7499 ALLEN SALESMAN 7698 20.02.81 1600 300 30
7521 WARD SALESMAN 7698 22.02.81 1250 500 30
7566 JONES MANAGER 7839 02.04.81 2975 20
7654 MARTIN SALESMAN 7698 28.09.81 1250 1400 30
7698 BLAKE MANAGER 7839 01.05.81 2850 30
7782 CLARK MANAGER 7839 09.06.81 2450 10
7788 SCOTT ANALYST 7566 09.12.82 3000 20
7839 KING PRESIDENT 17.11.81 10000 10
7844 TURNER SALESMAN 7698 08.09.81 1500 0 30
7876 ADAMS CLERK 7788 12.01.83 1100 20
7900 JAMES CLERK 7698 03.12.81 950 30
7902 FORD ANALYST 7566 03.12.81 3000 20
7934 MILLER CLERK 7782 23.01.82 1300 10
14 rows selected.
Your code would then be like this; note line #6 which calculates row number as I suggested; you'll use it in the final WHERE clause (line #11), while presenting that "max" row number value you desperately wanted.
SQL> with temp as
2 (select deptno,
3 sal,
4 row_number() over (partition by deptno order by sal) rn,
5 --
6 row_number() over (partition by deptno order by sal desc) rnd
7 from emp
8 )
9 select deptno, sal, rn
10 from temp
11 where rnd = 1
12 /
DEPTNO SAL RN
---------- ---------- ----------
10 10000 3
20 3000 4
30 2850 6
SQL>