Oracle i podział na podstrony Opcje

[mroowa]

Witam,
mam problem taki jak w temacie.

Robie zapytanie do Oracle które zwraca mi dużo wyników, potrzebuje podzielić je na podstrony w php.
Coś jak w MySQL

[SQL] pobierz, plaintext 
SELECT * FROM tabela WHERE STATUS = 'T' LIMIT 0, 20
[SQL] pobierz, plaintext 

a na następnej podstronie

[SQL] pobierz, plaintext 
SELECT * FROM tabela WHERE STATUS = 'T' LIMIT 21, 20
[SQL] pobierz, plaintext 

Jak coś takiego zrobić na oracle, słyszałem coś o FETCH, ale nie wiem z czym to sie je (IMG:http://forum.php.pl/style_emoticons/default/sad.gif)

Z góry dzięki za pomoc.

[Blackhole]

A dlaczeto takie zapytanie

[SQL] pobierz, plaintext 
SELECT * FROM scott.emp WHERE ROWNUM <= 10 AND ROWNUM > 3
[SQL] pobierz, plaintext 

nie zwraca nic?

[KILIUSZKIN]

A dlaczeto takie zapytanie

[SQL] pobierz, plaintext 
SELECT * FROM scott.emp WHERE ROWNUM <= 10 AND ROWNUM > 3
[SQL] pobierz, plaintext 

nie zwraca nic?

Rownum is a pseudo column. It numbers the records in a result set. The first record that meets the where criteria in a select statement is given rownum=1, and every subsequent record meeting that same criteria increases rownum. After issuing a select statement, one of the last steps that oracle does is to assign an increasing (starting with 1, increased by 1) number to each row returned. The value of this row number can always be queried with rownum in a select statement:

[SQL] pobierz, plaintext 
--------------
SELECT
  rownum, column_1, column_2 
FROM table_1, table_2
WHERE field_3 = 'some value'
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It is important to realize that the first row's rownum is always 1. This implies that the following query won't return a single row:

[SQL] pobierz, plaintext 
SELECT 
  column_1, column_2 
FROM table_1, table_2
WHERE field_3 = 'some value' AND rownum > 5
[SQL] pobierz, plaintext 

This is so because the first row would have to meet the following two mutually excluding criterias:
rownum is 1
rownum is 6 (rownum > 5)
In order to do this query in the (probably) intended spirit, a sub-query must be executed:

[SQL] pobierz, plaintext 
SELECT 
  column_1, column_2 
FROM ( SELECT 
    rownum r_, column_1, column_2
  FROM table_1, table_2
  WHERE field_3 = 'some value'
)
WHERE r_ > 5
[SQL] pobierz, plaintext