33 lines
825 B
MySQL
33 lines
825 B
MySQL
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/**
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编写一个 SQL 查询来实现分数排名。
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如果两个分数相同，则两个分数排名（Rank）相同。请注意，平分后的下一个
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名次应该是下一个连续的整数值。换句话说，名次之间不应该有“间隔”。
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+----+-------+
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| Id | Score |
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+----+-------+
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| 1 | 3.50 |
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| 2 | 3.65 |
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| 3 | 4.00 |
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| 4 | 3.85 |
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| 5 | 4.00 |
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| 6 | 3.65 |
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+----+-------+
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例如，根据上述给定的 Scores 表，你的查询应该返回（按分数从高到低排列）：
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+-------+------+
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| Score | Rank |
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+-------+------+
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| 4.00 | 1 |
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| 4.00 | 1 |
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| 3.85 | 2 |
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| 3.65 | 3 |
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| 3.65 | 3 |
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| 3.50 | 4 |
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+-------+------+
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*/
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select a.Score as Score,
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(select count(distinct b.Score) from Scores b where b.Score >= a.Score) as Rank
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from Scores a
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order by a.Score DESC
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