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solve.sql

# Rank Scores

## 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

```select Scores.Score , Ranking.Score
from Scores
join (select distinct Score from Scores) Ranking
on Scores.Score <= Ranking.Score
order by Scores.Score desc;```

``````4.00	4.00
4.00	4.00
3.85	4.00
3.85	3.85
3.65	3.65
3.65	4.00
3.65	4.00
3.65	3.85
3.65	3.85
3.65	3.65
3.50	4.00
3.50	3.85
3.50	3.50
3.50	3.65
``````

```select Scores.Score as Score, COUNT(*) as Rank
from Scores
join (select distinct Score from Scores) Ranking
on Scores.Score <= Ranking.Score
group by Scores.Id
order by Scores.Score desc;```
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