Paging with Oracle and sql server and generic paging method

Question

I want to implement paging in a gridview or in an html table which I will fill using ajax. How should I write queries to support paging? For example if pagesize is 20 and wh

Answer 1

"Because...data can be change from other sessions." What do you want to happen for this ?

For example, user gets the 'latest' ten rows at 10:30.

At 10:31, 3 new rows are added (so those ten being view by the user are no longer the latest).

At 10:32, the user requests then 'next' ten entries.

Do you want that new set to include those three that have been bumped from 8/9/10 down to 11/12/13 ? If not, in Oracle you can select the data as it was at 10:30

SELECT * FROM table_1 as of timestamp (timestamp '2009-01-29 10:30:00'); 

You still need the row_number logic, eg

 select * from
    (SELECT a.*, row_number() over (order by hire_date) rn
    FROM hr.employees as of timestamp (timestamp '2009-01-29 10:30:00') a)
 where rn between 10 and 19