Question

我需要根据条件找到不同类别的数据：破碎场，能量和PR。前两个类别很好。数据是一对一的映射。问题是公关类别。此类别中有几个日期。我需要在此类别中找到min（MilestoneDate），但min（MilesotoneDate）必须大于今天并且最接近今天。

Following are table data:

Site   Building       MilestoneID   MilestoneType  MilestoneDate
 AGE     building1     MIC.MS.1000    Breakground    1/1/18
 AGE     building1     MIC.ACT.1000   Energization   2/3/19
 AGE     building1     PTM.B1.1130    PR             2/5/19
 AGE     building1     PTM.B1.1140    PR             3/4/20
 AGE     building1     PTM.B1.1150    PR             12/25/20
 AGE     building1     PTM.B1.1160    PR             5/25/22
 AGE     building2     MIC.MS.1000    Breakground    2/2/19
 AGE     building2     MIC.ACT.1000   Energization   12/5/19
 AGE     building2     PTM.B2.1130    PR             3/5/20
 AGE     building2      PTM.B2.1140   PR             8/10/20
 AGE     building2      PTM.B2.1150   PR             3/4/21
 AGE     building2      PTM.B2.1160   PR             5/4/22
 OCA     building1     MIC.MS.1000    Breakground    4/2/19
 OCA     building1     MIC.ACT.1000   Energization   5/4/20  
 OCA     building1      PTM.B1.1130   PR             6/8/21
 OCA     building1     PTM.B1.1140    PR             12/2/21
 OCA     building1     PTM.B1.1150    PR             3/5/22
 OCA     building1     PTM.B1.1160    PR             12/30/22

与managementview AS （选择 * 从management_view_nancy m 左联接（选择 * 来自（ SELECT projectobjectid， id AS activity_id， finishdate作为里程碑日期， NAME AS里程碑来自活动 ds = （选择最大（ds）来自活动）全联盟 SELECT projectobjectid， id AS activity_id，最少（结束日期）AS结束日期，名称来自活动在哪里输入（'LRP-RVA-B3-FS1000'， 'LRP-RVA-B3-PR1000'， 'LRP-RVA-B3-PR1500'） AND projectobjectid = 4908 GROUP BY projectobjectid， ID， NAME））p 在try_cast（m.objectid为DOUBLE）= p.projectobjection AND m.id = p.activity_id），pr AS （选择 *， row_number（）OVER（按站点，建筑物，里程碑类型的分区ORDER BY try（cast（substr（milestonedate，1，10）AS date）））rn 从管理层的观点在哪里try（cast（substr（milestonedate，1，10）AS日期））> = CURRENT_DATE AND trim（milestonetype）='PR'） SELECT网站，建造， ID，里程碑类型里程碑，里程碑日期从管理层的观点里程碑类型IN（“突破地”， “激励”）全联盟 SELECT网站，建造， ID，里程碑类型里程碑，里程碑日期从公关 rn = 1

查询工作正常，但没有得到我想要的结果。我需要PR类别中的min（MilestoneDate），并且min（MilestoneDate）应该大于今天但最接近今天。该查询仍然为我提供了PR类别中的多个MilestoneDate。任何建议将不胜感激

Answer 1

我建议使用CTE引入要保留的PR数据点：

WITH cte AS (
    SELECT *,
        ROW_NUMBER() OVER (PARTITION BY Site, Building ORDER BY MilestoneDate) rn
    FROM managementview
    WHERE MilestoneDate >= CURRENT_DATE AND milestonetype = 'PR'
)

SELECT site, building, id, milestonetype, milestone, milestonedate
FROM managementview
WHERE milestonetype IN ('Breakground', 'Energization')
UNION ALL
SELECT site, building, id, milestonetype, milestone, milestonedate
FROM cte
WHERE rn = 1;

如果您的Presto版本不支持CTE，请尝试对其进行内联：

SELECT site, building, id, milestonetype, milestone, milestonedate
FROM managementview
WHERE milestonetype IN ('Breakground', 'Energization')
UNION ALL
SELECT site, building, id, milestonetype, milestone, milestonedate
FROM
(
    SELECT m.*,
        ROW_NUMBER() OVER (PARTITION BY Site, Building ORDER BY MilestoneDate) rn
    FROM managementview m
    WHERE MilestoneDate >= CURRENT_DATE AND milestonetype = 'PR'
) t
WHERE rn = 1;

如何按条件从多个类别中查找日期

1 个答案: