获取表格中的第一个和最后一个记录

Question

我有不同的STime和ETime的Id1和Id2。对于每组Id1和Id2，我倾向于获取第一个和最后一个记录（如输出中所示）。 我试图通过ASC和DESC顺序使用分区与ID1和ID2，并责令该表：

ROW_NUMBER() OVER(PARTITION BY B.HardwareId, A.TripId ORDER BY StartTime) AS first_record, 
ROW_NUMBER() OVER(PARTITION BY B.HardwareId, A.TripId ORDER BY StopTime DESC) AS last_record 

如预期，我没有得到结果。

SELECT 
    A.Id1 AS Id1, 
    A.Id2 AS TriId2pId, 
    STime, 
    ETime, 
    Latitude, 
    Longitude 

FROM 
    Tr.T1 AS A 
JOIN 
    Tp.G2 AS B 
ON 
    A.STime < B.DateTime 
    AND A.ETime >= B.DateTime 
    AND A.Id1 = B.Id1 
WHERE 
    (A._PARTITIONTIME BETWEEN TIMESTAMP('2016-11-23') 
    AND TIMESTAMP('2016-11-23') 
    AND A.Id1 IN (976)) 
ORDER BY 
    B.Id1, 
    A.Id2, 
    B.DateTime 



    Id1 Id2 STime    ETime    Latitude Longitude 
    976 715 2016-11-23 13:06:26 2016-11-23 13:23:30 26.2230015 -80.12314  
    976 715 2016-11-23 13:06:26 2016-11-23 13:23:30 26.2229767 -80.12326  
    976 715 2016-11-23 13:06:26 2016-11-23 13:23:30 26.2226944 -80.12344 
    976 800 2016-11-23 13:06:26 2016-11-23 13:24:59 26.2251511 -80.11865  
    976 800 2016-11-23 13:06:26 2016-11-23 13:24:59 26.2251511 -80.11912  
    976 800 2016-11-23 13:06:26 2016-11-23 13:24:59 26.2250233 -80.11929  
    976 800 2016-11-23 13:06:26 2016-11-23 13:24:59 26.2245369 -80.11929   


    Id1 Id2 STime    ETime    Latitude Longitude 
    976 715 2016-11-23 13:06:26 2016-11-23 13:23:30 26.2230015 -80.12314 
    976 715 2016-11-23 13:06:26 2016-11-23 13:23:30 26.2226944 -80.12344 
    976 800 2016-11-23 13:06:26 2016-11-23 13:24:59 26.2251511 -80.11865 
    976 800 2016-11-23 13:06:26 2016-11-23 13:24:59 26.2245369 -80.11929 

Answer 1

查询在你原来的问题不完全匹配，你后面的评论，但仍低于应该帮助你，使你的目标

尝试

SELECT 
    A.Id AS Id, 
    StartTime, 
    StopTime, 
    Latitude, 
    Longitude 
FROM (
    SELECT 
    A.Id AS Id, 
    StartTime, 
    StopTime, 
    Latitude, 
    Longitude, 
    ROW_NUMBER() OVER(PARTITION BY id ORDER BY StartTime) AS first_record, 
    ROW_NUMBER() OVER(PARTITION BY id ORDER BY StartTime DESC) AS last_record 
    FROM 
    Tb1.Ids AS A 
    JOIN 
    Tb2.Points AS B 
    ON 
    A.StartTime <= B.DateTime 
    AND A.StopTime >= B.DateTime 
    AND A.HardwareId = B.HardwareId 
    WHERE 
    (A._PARTITIONTIME BETWEEN TIMESTAMP('2016-11-23') 
    AND TIMESTAMP('2016-11-23')) 
    AND A.Id IN (334) 
) 
WHERE first_record = 1 OR last_record = 1 

理念这里在内部添加两个字段将编号从开始和结束的所有行的查询

ROW_NUMBER() OVER(PARTITION BY id ORDER BY StartTime) AS first_record, 
    ROW_NUMBER() OVER(PARTITION BY id ORDER BY StartTime DESC) AS last_record 

和tha n离开第一行和最后一行

WHERE first_record = 1 OR last_record = 1