Max()Over Partition By with date conditions

Question

如何将以下结果变为黄色？

我想找到上一年的最高分(不包括当前日期)和Name1和Parent1的分区

我已经尝试了以下没有给出所需结果的内容,它只返回正确分区的max,但是在所有日期之间.

select 
[VDate]
,[Name1]
,[Parent1]
,[Score]
,max(case when [VDate] > dateadd(year, -1, [VDate]) then [Score] else null end) over (partition by [Name1], [Parent1]) AS MaxScoreInPreviousLast12Months
from [dbo].[Control]

表数据:

CREATE TABLE Control
    ([VDate] datetime, [Name1] varchar(10), [Parent1] varchar(10), [Score] int);

INSERT INTO Control ([VDate], [Name1], [Parent1], [Score])
VALUES
('2018-08-01 00:00:00', 'Name1', 'Parent1', 80),
('2018-07-01 00:00:00', 'Name1', 'Parent1', 85),
('2018-06-01 00:00:00', 'Name1', 'Parent1', 90),
('2017-09-01 00:00:00', 'Name1', 'Parent1', 100),
('2017-08-01 00:00:00', 'Name1', 'Parent1', 95),
('2017-07-01 00:00:00', 'Name1', 'Parent1', 70),

('2018-08-01 00:00:00', 'Name2', 'Parent2', 80),
('2018-07-01 00:00:00', 'Name2', 'Parent2', 85),
('2018-06-01 00:00:00', 'Name2', 'Parent2', 90),
('2017-10-01 00:00:00', 'Name2', 'Parent2', 60),
('2017-08-01 00:00:00', 'Name2', 'Parent2', 95),
('2017-07-01 00:00:00', 'Name2', 'Parent2', 70),

('2018-08-01 00:00:00', 'Name3', 'Parent3', 80),
('2018-07-01 00:00:00', 'Name3', 'Parent3', 96),
('2018-06-01 00:00:00', 'Name3', 'Parent3', 90),
('2017-10-01 00:00:00', 'Name3', 'Parent3', 96),
('2017-08-01 00:00:00', 'Name3', 'Parent3', 99),
('2017-07-01 00:00:00', 'Name3', 'Parent3', 105)
;

这适用于SQL Server 2016+

Answer 1

这是一种使用外部应用于相关子查询的方法.感谢您发布ddl和示例数据.使这很好,易于使用.

select c.*
    , x.MaxScore
from Control c
outer apply
(
    select MaxScore = max(Score)
    from Control c2
    where c2.VDate < c.VDate
        and c2.VDate >= dateadd(year, -1, c.VDate)
        and c.Name1 = c2.Name1
        and c.Parent1 = c2.Parent1
) x