Question

我的观察表是这样的：

position price orderid buylog otherlog
1         15   100     08:00  08:01
2         15   100     08:00  08:02
2         15   100     08:00  08:05
2         15   100     08:00  08:02
2         15   101     08:10  08:15
2         15   101     08:10  08:12
2         15   102     08:20  08:25
2         15   103     08:30  08:31
2         15   103     08:30  08:32
2         15   103     08:30  08:33

预期结果：

position price orderid buylog otherlog
1         15   100     08:00  08:01
2         15   100     08:00  08:05
2         15   101     08:10  08:15
2         15   102     08:20  08:25
2         15   103     08:30  08:33

这只是迈出的一步，我想，我真正想要的是：

position price
1         15 
2         60

所以我需要概述每个职位的总付款。

但是现在，我需要的是：对于每个位置和orderid，我只想要具有最高其他日志条目的行。

现在有其他日志时间低于buylog-times，但我只是通过buylog < otherlog过滤掉了它们。

但是现在我不知道如何只显示每个orderid组中最高的其他日志。我尝试使用max(otherlog)，但它仍会输出第一个表格。

这是将三个表连接在一起后的视图，我希望在同一个查询中得到预期的结果。

查询是这样的：

select position,price,orderid,buylog,otherlog 
from table1 inner join table2 on t1.userid=t2.userid  
inner join table3 on t2.id=t2.id 
where (some conditions to narrow down the results)

我正在使用ms sql server 2012。

//修改

查询：

Use [dbname]

go

    with cte
    as  (   select olt.position,
                ot.price,
                ot.orderid,
                ot.buylog = min(ot.buylog) over (partition by olt.position,ot.orderid),
                olt.otherlog = max(olt.otherlog) over (partition by olt.position,ot.orderid),
                rn=row_number() over(partition by olt.position, order by olt.position)
            from ordertable as ot inner join anothertable as at 
                            on ordertable.userid=anothertable.userid

                inner join otherlogtable as olt on anothertable.id=otherlogtable.sessionlogid
        )
    select  
    olt.position,
    ot.price,
    ot.orderid,
    ot.buylog,
    olt.otherlog
    from
    cte
    where
    rn=1

Answer 1

这应该可行（虽然不确定列的来源）：

WITH cte 
     AS (SELECT position, 
                price, 
                orderid, 
                buylog = Min(buylog) 
                          OVER( 
                            partition BY position,orderid), 
                otherlog = Max(otherlog) 
                            OVER( 
                              partition BY position,orderid), 
                rn = Row_number() 
                     OVER( 
                       partition BY position,orderid 
                       ORDER BY position) 
         FROM  T1)
SELECT position, 
       price, 
       orderid, 
       buylog, 
       otherlog 
FROM   cte 
WHERE  rn = 1

这里是DEMO

修改以下是您加入的完整查询，将您编辑过的问题考虑在内：

WITH cte 
     AS (SELECT olt.position, 
                ot.price, 
                ot.orderid, 
                ot.buylog = Min(ot.buylog) 
                              OVER ( 
                                partition BY olt.position, ot.orderid), 
                olt.otherlog = Max(olt.otherlog) 
                                 OVER ( 
                                   partition BY olt.position, ot.orderid), 
                rn=Row_number() 
                     OVER( 
                       partition BY olt.position 
                       ORDER BY olt.position) 
         FROM   ordertable AS ot 
                INNER JOIN anothertable AS at 
                        ON ordertable.userid = anothertable.userid 
                INNER JOIN otherlogtable AS olt 
                        ON anothertable.id = otherlogtable.sessionlogid) 
SELECT position, 
       price, 
       orderid, 
       buylog, 
       otherlog 
FROM   cte 
WHERE  rn = 1

问题是：

从CTE上的外部选择中移除表名称（例如SELECT position而不是SELECT olt.position）
删除PARTITION BY部分ROW_NUMBER和ORDER BY之间的逗号：rn=Row_number() OVER( partition BY olt.position ORDER BY olt.position)

Answer 2

试试这个：

with cte

as  (   select olt.position,

            ot.price,

            ot.orderid,

            log1 = min(ot.buylog) over (partition by olt.position,ot.orderid),

            log2 = max(olt.otherlog) over (partition by olt.position,ot.orderid),

            rn=row_number() over(partition by olt.position order by olt.position)

        from

            ordertable as ot

            inner join anothertable as at on ordertable.userid=anothertable.userid

            inner join otherlogtable as olt on anothertable.id=otherlogtable.sessionlogid
    )

select   position,  price,   orderid,

log1 ALIASNAME1, log2 ALIASNAME2

from   cte  where  rn=1

使用value1查询

2 个答案: