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      在mysql數(shù)據(jù)庫中 rank的用法

      時(shí)間: 長(zhǎng)思709 分享

        在mysql數(shù)據(jù)庫中 rank的用法的用法你知道嗎?下面小編就跟你們?cè)敿?xì)介紹下在mysql數(shù)據(jù)庫中 rank的用法的用法,希望對(duì)你們有用。

        在mysql數(shù)據(jù)庫中 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.

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

        | 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):

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

        | Score | Rank |

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

        | 4.00 | 1 |

        | 4.00 | 1 |

        | 3.85 | 2 |

        | 3.65 | 3 |

        | 3.65 | 3 |

        | 3.50 | 4 |

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

        題目解答:

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        # 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;

      在mysql數(shù)據(jù)庫中 rank的用法

      在mysql數(shù)據(jù)庫中 rank的用法的用法你知道嗎?下面小編就跟你們?cè)敿?xì)介紹下在mysql數(shù)據(jù)庫中 rank的用法的用法,希望對(duì)你們有用。 在mysql數(shù)據(jù)庫中 rank的用法的用法如下: Write a SQL query to rank scores. If there is a tie between t
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