Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17


Oracle Rownum

Posted on 2004-04-18
Medium Priority
Last Modified: 2009-09-30
i have this query

select deptno,sal,rownum
select deptno,sum(sal) sal
from emp
group by deptno)

this will give me the rownum....but i want to reset the rownum when the dept changes.How can you do this or is there any other way????
Question by:sindhuanand
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Accepted Solution

musdu earned 200 total points
ID: 10857124

select deptno,sal, rank() over (partition by deptno order by rownum) as seq
select deptno,sum(sal) sal
from emp
group by deptno)

LVL 13

Expert Comment

ID: 10857134
This is Easy:

sect deptno,sal,row_number() over (partition by deptno order by '1')
(select deptno,sum(sal) sal
from emp
group by deptno)

Analytics Rock...Analytics Roll


my question is:

since you are grouping by deptno, so if you want to reset the rownum for each deptno, then each deptno will have rownum 1 eactly...this doesn't makes sense to me. For Example:
  1  select deptno,sal,row_number() over (partition by deptno order by '1')
  2  from
  3  (select deptno,sum(sal) sal
  4  from test.emp
  5* group by deptno)
SQL> /

========== ========== ==============================
        10       8750                              1
        20      10075                              1
        30       9480                              1

However, this may makes sense:

  1  select empno,ename,deptno,sal,row_number() over (partition by deptno order by '1')
  2* from test.emp
SQL> /

========== ========== ========== ========== ==============================
      7782 CLARK              10       2450                              1
      7839 KING               10       5000                              2
      7934 MILLER             10       1300                              3
      7566 JONES              20       2975                              1
      7902 FORD               20       3000                              2
      7876 ADAMS              20       1100                              3
      7788 SCOTT              20       3000                              4
      7499 ALLEN              30       1680                              1
      7900 JAMES              30        950                              2
      7844 TURNER             30       1500                              3
      7654 MARTIN             30       1250                              4
      7698 BLAKE              30       2850                              5
      7521 WARD               30       1250                              6

Would you please tell us what is reason behind getting such output (as you described) ?

Featured Post

Free Backup Tool for VMware and Hyper-V

Restore full virtual machine or individual guest files from 19 common file systems directly from the backup file. Schedule VM backups with PowerShell scripts. Set desired time, lean back and let the script to notify you via email upon completion.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Truncate is a DDL Command where as Delete is a DML Command. Both will delete data from table, but what is the difference between these below statements truncate table <table_name> ?? delete from <table_name> ?? The first command cannot be …
Note: this article covers simple compression. Oracle introduced in version 11g release 2 a new feature called Advanced Compression which is not covered here. General principle of Oracle compression Oracle compression is a way of reducing the d…
This video shows, step by step, how to configure Oracle Heterogeneous Services via the Generic Gateway Agent in order to make a connection from an Oracle session and access a remote SQL Server database table.
This video shows how to configure and send email from and Oracle database using both UTL_SMTP and UTL_MAIL, as well as comparing UTL_SMTP to a manual SMTP conversation with a mail server.

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question