ROWNUM

Hi,

I would like to know, whether I can query a table based on the rownum.
for example, If I want the records from 5000 to 10000 in the table : Can I use
select * from table_name
where rownum between 5000 and 10000;

Badrinath

No ...
Rownum Changes with the Query.
Valid Commands for Rownum
are

Rownum = 1 (Equal Sign only with 1)
Rownum <= Always fine
Nothing else is supported... You won't get any thing.

Thanks

You can use ROWNUM to limit the number of rows returned by a query, as in this example:

SELECT * FROM emp WHERE ROWNUM < 10;


Conditions testing for ROWNUM values greater than a positive integer are always false. For example, this query returns no rows:

SELECT * FROM emp
WHERE ROWNUM > 1;


The first row fetched is assigned a ROWNUM of 1 and makes the condition false. The second row to be fetched is now the first row and is also assigned a ROWNUM of 1 and makes the condition false. All rows subsequently fail to satisfy the condition, so no rows are returned.

You can think things in defferent way:

First get a result set by querying rownum < 10000,
then you can get the result set you want by issuing rownum > 5000 based on the first result set which you already done.

Take care

the following is what I cut down from the same forum long time ago, thanks to the contributor.

To have records from 10 to 20
do
select * from emp where rownum < 21
minus
select * from emp where rownum < 11;

Cheers.

This would work as well

select * from
(select empno, ename, mgr, rownum as number_row from emp where rownum < 21)
where number_row > 11;

... and pando's is much more efficient.

Here is a thread on the topic:

http://www.dbasupport.com/forums/sho...?threadid=5480

- Chris

hi

yeah use the inline view like the one used by pando definately it will work
thanks
pras