Rank Versus Dense Rank

Show how the two ranking functions differ on tied grade point averages. For every student with a known gpa, return first_name, last_name, gpa, rnk (RANK() by gpa descending) and dense (DENSE_RANK() by gpa descending). Sort by gpa descending, then id. After the two students at 3.80, RANK() skips to 6 while DENSE_RANK() continues with 5.

Expected result:

+------------+-----------+------+-----+-------+
| first_name | last_name |  gpa | rnk | dense |
+------------+-----------+------+-----+-------+
| Evelyn     | Park      | 3.98 |   1 |     1 |
| Sophia     | Rossi     | 3.92 |   2 |     2 |
| Grace      | Lee       | 3.88 |   3 |     3 |
| Ava        | Patel     |  3.8 |   4 |     4 |
| Mia        | Haddad    |  3.8 |   4 |     4 |
| Emily      | Zhang     | 3.72 |   6 |     5 |
| Charlotte  | Dubois    | 3.67 |   7 |     6 |
| Scarlett   | Johnson   |  3.6 |   8 |     7 |
| Harper     | Singh     | 3.55 |   9 |     8 |
| Zoe        | Campbell  |  3.5 |  10 |     9 |
+------------+-----------+------+-----+-------+
(showing 10 of 27 rows)

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