Pagination Displaying Count of Total Records available and Current Page

Question

Hi,
I need to implement paging in one of our pages.
The problem is we need to display the count of total number of records the search has resulted and the search results that fall into the current page.
For e.g. If the search resulted in 100 records total and we are in page 5 (with 10 records per page), I need to display the count 100 on the top and records 51-50 in the page.
How to get the count of fetched results without running a second SELECT COUNT(1) FROM ... clause.
Is there a way to do this in a optimized way?
Thanks

Answer 1

How to get the count of fetched results without running a second SELECT COUNT(1) FROM ... clause.
SQL> select cnt "Total", rn "Line", empno, ename, job
  from (select count (*) over () cnt, row_number () over (order by empno) rn,
               empno, ename, job
          from emp)
where rn between 4 and 6
     Total       Line      EMPNO ENAME      JOB     
        14          4       7566 JONES      MANAGER 
        14          5       7654 MARTIN     SALESMAN
        14          6       7698 BLAKE      MANAGER