ROW_NUMBER and paging

Question

hello
A simple question on paging/ROW_NUMBER. The following sql is fine.
select PersonId, Logon, IsSuspended, ROW_NUMBER() OVER(ORDER BY Logon ASC) RowNumber FROM Person;
Now to do paging (retrieve only record 1 to 10), I added the WHERE clause:
select PersonId, Logon, IsSuspended, ROW_NUMBER() OVER(ORDER BY Logon ASC) RowNumber FROM Person WHERE RowNumber>1 AND RowNumber<10;
But the complaint was:
ORA-00904: "*ROWNUMBER*": invalid identifier
Of course I can INSERT into a temp table first then select off the temp table but... I don't need to resort to this right?
Thanks

Answer 1

ah... ROWNUM does it.Not the way you think it does....
SQL> select count(*) from emp
  2  /
  COUNT(*)
        14
Elapsed: 00:00:00.03
SQL> select ename, sal from emp where rownum > 1
  2  /
no rows selected
Elapsed: 00:00:00.01
SQL>You have to alias it, inside an inline view. It fact, just like ROW_NUMBER().
The other thing which concerns me is the word "paging" in the subject. This is the wrong way to handle paging of rows in a multi-row block. Your client program should handle both the paging and the fetching of rows from a resultset.
Cheers, APC
blog: http://radiofreetooting.blogspot.com