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CodeSnip: Selecting the nth Record from a Table Using Oracle
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by Deepankar Sarangi
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| Conclusion |
Rownum proves to be to a better option than rowid for
finding the nth record of a table.
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User Comments
Title:
superb explanation
Name:
santy
Date:
2012-07-09 11:31:48 AM
Comment:
Good explanation......
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Title:
Mr
Name:
Bhavanarayana
Date:
2011-01-24 2:01:02 AM
Comment:
Hi.. this is a wonderful help... Plz do continue and share your knowledge.... Thank u very much for posting this online..Wish you all the best
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Title:
nice explanation
Name:
thousef
Date:
2010-12-29 3:41:00 PM
Comment:
it is a very nice method to understand the rowid,rownum queries..
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Title:
Good explanation
Name:
G.Gokul
Date:
2010-10-30 9:29:49 PM
Comment:
Yes,this is a very good explanation about rownum.And it is a very useful tip for me to understand about the rownum and rowid concept.
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Title:
Question
Name:
PrashantBilaiya
Date:
2010-01-21 6:13:10 AM
Comment:
1.How to get nth record without help rownum?
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Title:
Finding nth employee
Name:
Abhishek
Date:
2009-12-02 2:31:12 AM
Comment:
Tihs works out.....
U simply make an inline view with rownum as a column and filter using that column
Select * from
(
Select e.*, rownum AS Record_NUM from employees e)
where record_num=24
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Title:
Find Top nth record of employee
Name:
Alok Kumar Ranjan
Date:
2009-10-06 10:46:36 AM
Comment:
/* we can easily find Top nth record of Employee */
select * from emp
where rownum <= '&n';
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Title:
how to delete nth record from a table
Name:
shiba
Date:
2009-07-18 9:56:12 AM
Comment:
It is helpful
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Title:
Answer to sanjeet's question
Name:
Deepankar Sarangi (Auther)
Date:
2008-11-27 2:35:45 AM
Comment:
select * from emp where rownum <16;
EMPNO ENAME ROWID
---------- ---------- ------------------
7369 SMITH AAAHW7AABAAAMUiAAA
7499 ALLEN AAAHW7AABAAAMUiAAB
7521 WARD AAAHW7AABAAAMUiAAC
7566 JONES AAAHW7AABAAAMUiAAD
7654 MARTIN AAAHW7AABAAAMUiAAE
7698 BLAKE AAAHW7AABAAAMUiAAF
7782 CLARK AAAHW7AABAAAMUiAAG
7788 SCOTT AAAHW7AABAAAMUiAAH
7839 KING AAAHW7AABAAAMUiAAI
7844 TURNER AAAHW7AABAAAMUiAAJ
7876 ADAMS AAAHW7AABAAAMUiAAK
7900 JAMES AAAHW7AABAAAMUiAAL
7902 FORD AAAHW7AABAAAMUiAAM
7934 MILLER AAAHW7AABAAAMUiAAN
select * from emp where rownum <8 minus select * from emp where rownum <7;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
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Title:
question
Name:
sanjeet
Date:
2008-05-27 1:19:09 AM
Comment:
Question: display the 7th record of emp table with using rownum.
Question: delete all duplicate records except one record from emp table as empno. , ename, salary,
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