Question

我在下面的查询中，交叉连接来自Persons表的Person_ID和来自DateRange的Date Range。这给了我范围内每个日期的Person_ID。

WITH DateRange(DateData) AS
                    (
                        SELECT CONVERT(DATETIME, '02/01/2016') as Date
                        UNION ALL
                        SELECT DATEADD(d,1,DateData)
                        FROM DateRange
                        WHERE DateData < CONVERT(DATETIME, '04/26/2016')
                    )
SELECT TBL_PERSONS.ID AS PERSON_ID, DateRange.DateData AS [DATE]
       FROM
         TBL_PERSONS
         CROSS JOIN DateRange                                    
         WHERE TBL_PERSONS.STATUS='Active'

现在我要做的是每个Person_ID我想从同一个Person_ID的不同表中过滤最大日期的行。像这样的东西，

WITH DateRange(DateData) AS
                    (
                        SELECT CONVERT(DATETIME, '02/01/2016') as Date
                        UNION ALL
                        SELECT DATEADD(d,1,DateData)
                        FROM DateRange
                        WHERE DateData < CONVERT(DATETIME, '02/15/2016')
                    )
SELECT T1.PERSON_ID, T1.[DATE]
FROM 
    (SELECT TBL_PERSONS.ID AS PERSON_ID, DateRange.DateData AS [DATE]
       FROM
         TBL_PERSONS
         CROSS JOIN DateRange                                    
         WHERE TBL_PERSONS.STATUS='Active'
     ) T1
GROUP BY T1.PERSON_ID, T1.[DATE]
HAVING T1.[DATE] <=  (SELECT DATEADD(day, 5, MAX(CAST(event_time_Local AS DATE))) AS [DATE] 
                                    FROM TBL_EVENTS_HISTORY
                                    WHERE PRIMARYID = T1.PERSON_ID
                                    GROUP BY PRIMARYID )

但是这仍然给出了所有person_id的所有日期。我尝试使用Where而不是HAVING但没有任何变化。我也试过，下面但是同样的结果。

WITH DateRange(DateData) AS
                    (
                        SELECT CONVERT(DATETIME, '02/01/2016') as Date
                        UNION ALL
                        SELECT DATEADD(d,1,DateData)
                        FROM DateRange
                        WHERE DateData < CONVERT(DATETIME, '02/15/2016')
                    )
SELECT T1.PERSON_ID, T1.[DATE]
FROM 
    (SELECT TBL_PERSONS.ID AS PERSON_ID, DateRange.DateData AS [DATE]
       FROM
         TBL_PERSONS
         CROSS JOIN DateRange                                    
         WHERE TBL_PERSONS.STATUS='Active'
     ) T1
JOIN 
(SELECT PRIMARYID AS PERSON_ID, DATEADD(day, 5, MAX(CAST(event_time_Local AS DATE))) AS [DATE] 
                                    FROM TBL_EVENTS_HISTORY
                                    GROUP BY PRIMARYID ) T2
ON T1.PERSON_ID = T2.PERSON_ID
AND T1.[DATE] <= T2.[DATE]

我的问题是，我做错了吗？或者甚至可以为每个组分别使用过滤器？

注意：我正在尝试构建独立于SQL Server或Oracle的查询。

SQL：GROUP BY与来自子查询的单个组过滤器

0 个答案: