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An inner N reporting retrieve a set of rows in a complete data set classified by its row number.
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Inner-n query
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;