Reporting - Inner N

An inner N reporting retrieve a set of rows in a complete data set classified by its row number.

The following inner-N query with the Oracle row_number analytic function selects all rows from the employees table but returns only the fifty-first through one-hundredth row:

SELECT last_name FROM 
   (SELECT last_name, ROW_NUMBER() OVER (ORDER BY last_name) R FROM employees)
   WHERE R BETWEEN 51 AND 100;

• ROW_NUMBER