Postgresql 仅返回RANK（）之后的最低值

我使用以下方法创建了某些“案例”：

现在我需要在每个case_id中创建等级，其中名称只能出现一次，最低等级应该分配给最低的some_值

以下是数据示例：

以及所需的输出：

Select * from ( 

    Select Name, A, B, some_value, case_id 
    , ROWNO() over (partition by case_id, Name order by some_value) as R1
    from (
        Select 'SF' as Name, 'y' as A, 'n' as B, 120 as some_value, 1 as case_id
        union all Select 'NY' as Name, 'y' as A, 'n' as B, 150 as some_value, 1 as case_id
        union all Select 'LA' as Name, 'y' as A, 'n' as B, 155 as some_value, 1 as case_id
        union all Select 'SF' as Name, 'y' as A, 'n' as B, 160 as some_value, 1 as case_id
        union all Select 'SF' as Name, 'n' as A, 'y' as B, 110 as some_value, 5 as case_id
        union all Select 'NY' as Name, 'n' as A, 'y' as B, 120 as some_value, 5 as case_id
        union all Select 'LA' as Name, 'n' as A, 'y' as B, 125 as some_value, 5 as case_id
        union all Select 'LA' as Name, 'n' as A, 'y' as B, 140 as some_value, 5 as case_id
        union all Select 'NY' as Name, 'n' as A, 'y' as B, 155 as some_value, 5 as case_id
    ) testdata

    ) data
Where R1 = 1
order by case_id, some_value

---

您的意思是您想要最低的

案例id

值？在这里，示例数据和预期输出将非常有用。

Select * from ( 

    Select Name, A, B, some_value, case_id 
    , ROWNO() over (partition by case_id, Name order by some_value) as R1
    from (
        Select 'SF' as Name, 'y' as A, 'n' as B, 120 as some_value, 1 as case_id
        union all Select 'NY' as Name, 'y' as A, 'n' as B, 150 as some_value, 1 as case_id
        union all Select 'LA' as Name, 'y' as A, 'n' as B, 155 as some_value, 1 as case_id
        union all Select 'SF' as Name, 'y' as A, 'n' as B, 160 as some_value, 1 as case_id
        union all Select 'SF' as Name, 'n' as A, 'y' as B, 110 as some_value, 5 as case_id
        union all Select 'NY' as Name, 'n' as A, 'y' as B, 120 as some_value, 5 as case_id
        union all Select 'LA' as Name, 'n' as A, 'y' as B, 125 as some_value, 5 as case_id
        union all Select 'LA' as Name, 'n' as A, 'y' as B, 140 as some_value, 5 as case_id
        union all Select 'NY' as Name, 'n' as A, 'y' as B, 155 as some_value, 5 as case_id
    ) testdata

    ) data
Where R1 = 1
order by case_id, some_value