My query below is probably flawed... I just remembered you would have to
alias rownum...
select inner_row as rownum, gender
from (select rownum as inner_row, gender
from emp2 where rownum <= 600)
where rownum >= 500;
Regards,
Mark.
Ryan did a good job of explaining the use of rownum - better than my
attempt.
Mark Richard
To: [EMAIL PROTECTED]
09/07/2003 11:37 cc:
Subject: Re: something appears to be
funny with ROWNUM(Document link: Mark Richard)
ROWNUM has to start from 1 - If you never select a row then rownum can't
increase. You have to assign rownums and then filter them out later,
usually using a subquery.
The solution to your specific query below would be something like:
select rownum, gender
from (select rownum, gender
from emp2
where rownum <= 600
)
where rownum >= 500;
The emails I sent earlier for your other problem are based around the fact
that rownum will restart from 1 during each iteration. You possibly don't
understand rownum properly - it is a unique number assigned to a specific
result set, not the rows existing in the underlying table. It must start
from 1 each time and therefore where clauses can only test some conditions
like "rownum = 1" (get a single row), "rownum <= x" (get up to x rows).
MaryAnn Atkinson
<[EMAIL PROTECTED] To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
.com> cc:
Sent by: Subject: something appears to be funny
with ROWNUM
[EMAIL PROTECTED]
.com
09/07/2003 12:14
Please respond to
ORACLE-L
1. this first query gave me 600 lines of output.
SELECT Rownum, Gender
FROM EMP2
WHERE ROWNUM <= 600;
------------
2. this one right here told me no rows selected...
SELECT Rownum, Gender
FROM EMP2
WHERE ROWNUM BETWEEN 500 and 600;
I dont get it... something is funny with ROWNUM...
Any ideas?
thx
maa
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