Problem
Write a SQL query to rank scores. If there is a tie between two scores, both should have the same ranking. Note that after a tie, the next ranking number should be the next consecutive integer value. In other words, there should be no "holes" between ranks.
+----+-------+
| Id | Score |
+----+-------+
| 1 | 3.50 |
| 2 | 3.65 |
| 3 | 4.00 |
| 4 | 3.85 |
| 5 | 4.00 |
| 6 | 3.65 |
+----+-------+
For example, given the above Scores table, your query should generate the following report (order by highest score):
+-------+------+
| Score | Rank |
+-------+------+
| 4.00 | 1 |
| 4.00 | 1 |
| 3.85 | 2 |
| 3.65 | 3 |
| 3.65 | 3 |
| 3.50 | 4 |
+-------+------+
Solution 1
# Write your MySQL query statement below
SELECT
Score,
(SELECT count(distinct Score) FROM Scores WHERE Score >= s.Score) as Rank
FROM
Scores s
ORDER BY
Score DESC
Explain:
nope.
Complexity:
- Time complexity :
- Space complexity :
Solution 2
# Write your MySQL query statement below
SELECT
Score,
(SELECT count(*) FROM (SELECT distinct Score as s FROM Scores) tmp WHERE s >= Score) as Rank
FROM
Scores
ORDER BY
Score DESC
Explain:
nope.
Complexity:
- Time complexity :
- Space complexity :