mysql rank的用法

mysql rank的用法

在mysql数据库中 rank的用法的用法你知道吗？下面小编就跟你们详细介绍下在mysql数据库中 rank的用法的用法，希望对你们有用。

在mysql数据库中 rank的用法的用法如下：

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.

?

1

2

3

4

5

6

7

8

9

10

+----+-------+

| 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):

?

1

2

3

4

5

6

7

8

9

10

+-------+------+

| Score | Rank |

+-------+------+

| 4.00 | 1 |

| 4.00 | 1 |

| 3.85 | 2 |

| 3.65 | 3 |

| 3.65 | 3 |

| 3.50 | 4 |

+-------+------+

题目解答：

?

1

2

3

4

5

6

7

8

9

10

# Write your MySQL query statement below

SELECT Scores.Score, COUNT(Ranking.Score) AS RANK

FROM Scores

, (

SELECT DISTINCT Score

FROM Scores

) Ranking

WHERE Scores.Score <= Ranking.Score

GROUP BY Scores.Id, Scores.Score

ORDER BY Scores.Score DESC;