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    學(xué)習(xí)啦>學(xué)習(xí)英語>專業(yè)英語>計(jì)算機(jī)英語>

    在mysql數(shù)據(jù)庫中 rank的用法

    時(shí)間: 長思709 分享

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

      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?下面小編就跟你們詳細(xì)介紹下在mysql數(shù)據(jù)庫中 rank的用法的用法,希望對你們有用。 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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