SQL Serverのテーブルから複数の最大行を選択する方法

Question

毎日max(batchid)の行を選択する必要があります。

サンプルテーブル：

Id | BatchId |Date     |KeyValue 
-- | --------|---------------------|----------- 
1 | 1  | 2016-12-13 12:30:66 |1234 
2 | 1  | 2016-12-13 12:30:66 |5654 
3 | 2  | 2016-12-13 08:30:66 |1234 
4 | 2  | 2016-12-13 08:30:66 |5654 
5 | 1  | 2016-12-12 12:10:45 |1234 
6 | 1  | 2016-12-12 12:10:45 |5634 
7 | 2  | 2016-12-12 08:10:45 |1234 
8 | 2  | 2016-12-12 08:10:45 |5634 
9 | 3  | 2016-12-12 04:10:45 |9628 

予想される出力：事前に

Id | BatchId |Date     |KeyValue 
-- | --------|---------------------|----------- 
3 | 2  | 2016-12-13 08:30:66 |1234 
4 | 2  | 2016-12-13 08:30:66 |5654 
9 | 3  | 2016-12-12 04:10:45 |9628 

ありがとう！

Answer 1

使用max() over . . .：

select t.* 
from (select t.*, max(date) over (partition by cast(date as date)) as maxdate 
     from sample t 
    ) t 
where maxdate = date; 

あるいは、rank()/dense_rank()：

select t.* 
from (select t.*, 
      dense_rank() over (partition by cast(date as date) order by date desc) as seqnum 
     from sample t 
    ) t 
where seqnum = 1; 

Answer 2

訂正とゴードン・リノフの拡大：

rextester：http://rextester.com/GECAZ46515

create table BatchKeys (Id int,BatchId int,Date datetime,KeyValue int) 
insert into BatchKeys (Id,BatchId,Date,KeyValue) values 
(1,1,'2016-12-13T12:30:06',1234) 
,(2,1,'2016-12-13T12:30:06',5654) 
,(3,2,'2016-12-13T08:30:06',1234) 
,(4,2,'2016-12-13T08:30:06',5654) 
,(5,1,'2016-12-12T12:10:45',1234) 
,(6,1,'2016-12-12T12:10:45',5634) 
,(7,2,'2016-12-12T08:10:45',1234) 
,(8,2,'2016-12-12T08:10:45',5634) 
,(9,3,'2016-12-12T04:10:45',9628) 


select t.* 
from (select t.*, max(BatchId) over (partition by cast(date as date)) as maxBatchId 
     from BatchKeys t 
    ) t 
where maxBatchId = BatchId; 

select t.* 
from (select t.*, 
      dense_rank() over (partition by cast(date as date) order by BatchId desc) as seqnum 
     from BatchKeys t 
    ) t 
where seqnum = 1; 

select top 1 with ties t.* 
from BatchKeys t 
order by dense_rank() over (partition by cast(date as date) order by BatchId desc)