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我有一个用户活动表。我有 HWA、活动日期和 groupID。我根据日期范围获得用户活动的季度，即：

日期范围：2011-08-01 - 2012-07-31

Q1 - Aug-Oct
Q2 - Nov-Jan
Q3 - Feb-Apr
Q4 - May-Jul

一些 HWA 是其他 HWA 的替代品。在这些情况下，它们具有相同的 groupID 以表明它们是链接的。在这些情况下，我需要取消重叠的季度。澄清一下，如果两个 HWA 在第 2 季度使用并且它们具有相同的 groupID，那么我只需要为其中一个计算第 2 季度（这无关紧要）。下面是我现在使用的查询，得到的输出是：

SELECT act.HWA, count(act.HWA), m.Status, m.GroupID
    FROM (
        SELECT 
          a.HWA, a.Date,
          CASE 
            WHEN MONTH(a.Date) BETWEEN 8 AND 10 THEN 'Q1'
            WHEN (MONTH(a.Date) BETWEEN 11 AND 12 OR MONTH(a.Date) = 1) THEN 'Q2'
            WHEN MONTH(a.Date) BETWEEN 2 AND 4 THEN 'Q3'
            WHEN MONTH(a.Date) BETWEEN 5 AND 7 THEN 'Q4'
          END AS quarter,
          CASE
            WHEN MONTH(a.Date) <= 7 THEN YEAR(a.Date) - 1 
            ELSE EXTRACT(YEAR_MONTH from a.Date)
          END AS quarteryear,
          COUNT(*) AS num_activites
        FROM activity a
        WHERE a.InstitutionNumber = '000000000075'  
          AND (a.HWA = '001372EADBC4' 
            OR a.HWA = '180373E241DB' 
            OR a.HWA = '180373E23DE7')
          AND (a.Date between '2011-08-01' and '2012-07-31')
        GROUP BY
          quarter,
          a.HWA
    ) act, machine m
    where act.HWA = m.HWA
    group by act.HWA

这会返回：

HWA             quarters      status      groupid

001372EADBC4        3        deleted        59970
180373E23DE7        2         online        59970
180373E241DB        1        deleted        59970

预期结果将是：

HWA 宿舍状态 groupid

001372EADBC4        2        deleted        59970
180373E23DE7        2         online        59970
180373E241DB        0        deleted        59970

这是我通过稍微更改上述查询生成的每个 HWA 的季度列表。您可以看到所有三个 HWA 都有第 3 季度的份额，我希望它们中只有一个拥有第 3 季度的份额：

001372EADBC4    1   deleted 59970
001372EADBC4    2   deleted 59970
001372EADBC4    3   deleted 59970
180373E23DE7    3   online  59970
180373E241DB    3   deleted 59970
180373E23DE7    4   online  59970
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1 回答 1

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所以我通过在大多数情况下改变分组来解决这个问题：

SELECT act.HWA, count(act.HWA), m.Status, m.GroupID
  FROM (
   SELECT 
      a.HWA, a.Date,
      CASE
        WHEN MONTH(a.Date) BETWEEN 8 AND 10 THEN '1'
        WHEN (MONTH(a.Date) BETWEEN 11 AND 12 OR MONTH(a.Date) = 1) THEN '2'
        WHEN MONTH(a.Date) BETWEEN 2 AND 4 THEN '3'
        WHEN MONTH(a.Date) BETWEEN 5 AND 7 THEN '4'
       END AS quarter,
       CASE
          WHEN MONTH(a.Date) <= 7 THEN YEAR(a.Date) - 1 
          ELSE EXTRACT(YEAR_MONTH from a.Date)
        END AS quarteryear,
        COUNT(*) AS num_activites
      FROM activity a, machine m
      WHERE
        a.InstitutionNumber = '000000000075'
        AND m.InstitutionID = 14
        AND (a.HWA = '001372EADBC4' 
            OR a.HWA = '180373E241DB' 
            OR a.HWA = '180373E23DE7')
        AND a.HWA = m.HWA
        AND (a.Date between '2011-08-01' and '2012-07-31')
        AND a.EngineRequests > 0
        AND a.FilesAnalyzed > 0
      GROUP BY
        quarter,
        m.GroupID
  ) act, machine m
WHERE act.HWA = m.HWA
AND m.InstitutionID = 14
GROUP BY act.HWA

我在 SELECT 动作中添加了以下内容：

AND m.InstitutionID = 14 按 m.GroupID 分组

我从 SELECT 法案中删除了以下内容：

按 a.HWA 分组

于 2012-08-03T05:12:19.030 回答