如何根据年份和月份进行排名？

Posted 2023-02-16

【中文标题】如何根据年份和月份进行排名？

【英文标题】：How to make Ranking based on Year and Month?

【发布时间】：2019-12-06 10:52:09

【问题描述】：

我正在尝试根据年份和月份放置排名。我有类似的记录

产品

ProdID  Years  Months  Quantity
--------------------------------
1652    2018    10         2    
1010    2018    9          2    
2236    2018    10         2    
2236    2018    10         2    
1445    2019    5          2    
1789    2019    12         2    
1232    2018    12         2    

我尝试了以下查询

SELECT
    ProdID, Years, Months, Quantity,
    DENSE_RANK()OVER (Partition By Years Order By Months) Ranks
FROM Products

显然，结果会是

ProdID  Years  Months  Quantity   Ranks
---------------------------------------
1010    2018    9          2       1
1652    2018    10         2       2 
2236    2018    10         2       2
2236    2018    10         2       2
1232    2018    12         2       3
1445    2019    5          2       1
1789    2019    12         2       2

期待

ProdID  Years  Months  Quantity   Ranks
---------------------------------------
1010    2018    9          2       1
1652    2018    10         2       2 
2236    2018    10         2       2
2236    2018    10         2       2
1232    2018    12         2       3
1232    2018    12         2       3
1445    2019    5          2       4
1789    2019    12         2       5

【参考方案1】：

您需要从查询中删除 partition by 子句。只需使用 order by 子句。

SELECT ProdID, Years, Months, Quantity,
DENSE_RANK()OVER (Order By Years, Months) Ranks
FROM Products

【讨论】：

正确的兄弟。还剩 5 分钟接受您的回答。谢谢你

【参考方案2】：

下面的查询应该做你想做的事：

SELECT
    ProdID, Years, Months, Quantity,
    DENSE_RANK()OVER (ORDER BY  CAST(CAST(MONTHS AS VARCHAR)+'-01-'+CAST(YEARS AS VARCHAR) AS DATE)) Ranks
FROM Products