SELECT * FROM student;

--Example 1
SELECT student_id, first_name, last_name, enrolment_date,
LEAD(enrolment_date) OVER (ORDER BY enrolment_date ASC) AS next_enr_date
FROM student
ORDER BY student_id ASC;

--Example 2
SELECT student_id, first_name, last_name, enrolment_date,
LEAD(enrolment_date) OVER (ORDER BY enrolment_date ASC) AS next_enr_date
FROM student
ORDER BY enrolment_date ASC;

--Example 3
SELECT student_id, first_name, last_name, enrolment_date,
LEAD(enrolment_date, 2, '31-DEC-2999') OVER (ORDER BY enrolment_date ASC) AS next_enr_date
FROM student
ORDER BY enrolment_date ASC;


--Example 3
SELECT student_id, first_name, last_name, enrolment_date,
LEAD(enrolment_date) OVER (ORDER BY enrolment_date ASC) AS next_enr_date
FROM student
WHERE LEAD(enrolment_date) OVER (ORDER BY enrolment_date ASC) > '01-FEB-2015'
ORDER BY enrolment_date ASC;

http://www.databasestar.com/oracle-lead/

A few examples of the LEAD function.

Oracle LEAD Function

sql, Oracle

SQL