排名增加只爲行值的變化

Question

我已經使用psql的排名和分區功能來創建一張表，描述了旅行拍攝的照片序列，其中id是圖片ID，nsid是攝影師ID，位置是拍攝照片的地方，排名是在旅行期間拍攝照片的順序（由相同的date_trunc時間段中的照片定義）。

id |nsid   |location |date_taken |time_taken |date_trunc |rank 
1 |10000137@N04 |11   |08/03/2006 |18:42:02 |2006-03-06 |1  
2 |10000137@N04 |11   |08/03/2006 |18:56:44 |2006-03-06 |2  
3 |10000137@N04 |446  |12/09/2007 |01:05:27 |2007-09-10 |1  
4 |10000137@N04 |4   |12/09/2007 |01:05:35 |2007-09-10 |2  
5 |10000137@N04 |4   |12/09/2007 |01:05:41 |2007-09-10 |3  
6 |10000137@N04 |56   |12/09/2007 |01:05:45 |2007-09-10 |4  
7 |10000137@N04 |11   |03/07/2008 |09:21:54 |2008-06-30 |1  
8 |10000137@N04 |3199  |09/03/2013 |16:37:40 |2013-03-04 |1  
9 |10000137@N04 |4   |09/03/2013 |18:56:55 |2013-03-04 |2  
10 |10000280@N07 |215  |02/08/2007 |17:25:43 |2007-07-30 |1  
11 |10000280@N07 |215  |03/08/2007 |19:35:11 |2007-07-30 |2  
12 |100006043@N02 |203  |05/08/2013 |14:02:49 |2013-07-29 |1  
13 |100006043@N02 |1   |05/08/2013 |18:08:45 |2013-07-29 |2  
14 |100010324@N02 |1   |14/04/2013 |19:19:13 |2013-04-08 |1  
15 |100010343@N03 |367  |04/06/2014 |18:54:13 |2014-06-02 |1  
16 |100014982@N03 |2909  |28/08/2013 |23:20:27 |2013-08-26 |1  
17 |100014982@N03 |183  |13/09/2013 |12:26:41 |2013-09-09 |1  
18 |100018928@N06 |1149  |01/08/2013 |08:40:22 |2013-07-29 |1  
19 |100018928@N06 |1149  |01/08/2013 |08:40:23 |2013-07-29 |2  
20 |100018928@N06 |1149  |01/08/2013 |08:40:32 |2013-07-29 |3  
21 |100018928@N06 |1149  |01/08/2013 |08:40:33 |2013-07-29 |4  
22 |100021169@N02 |10   |02/07/2005 |18:17:26 |2005-06-27 |1  
23 |100021169@N02 |10   |02/07/2005 |18:18:13 |2005-06-27 |2 

我想創建一個名爲location_rank的新列，它是位置訪問順序的位置。因此，在同一次旅行中由相同用戶用戶在同一位置拍攝的照片將具有相同的location_rank，並且location_rank值只會增加該用戶旅行期間訪問的每個新位置（即僅當位置值從前一行改變時在分區中）。因此，所需的表是這樣的：

id |nsid   |location |date_taken|time_taken|date_trunc |rank|location_rank 
1 |10000137@N04 |11  |08/03/06 |18:42:02 |2006-01-01 |1 |1 
2 |10000137@N04 |11  |08/03/06 |18:56:44 |2006-01-01 |2 |1 
3 |10000137@N04 |446  |12/09/07 |01:05:27 |2007-01-01 |1 |1 
4 |10000137@N04 |4  |12/09/07 |01:05:35 |2007-01-01 |2 |2 
5 |10000137@N04 |4  |12/09/07 |01:05:41 |2007-01-01 |3 |2 
6 |10000137@N04 |56  |12/09/07 |01:05:45 |2007-01-01 |4 |3 
7 |10000137@N04 |11  |03/07/08 |09:21:54 |2008-01-01 |1 |1 
8 |10000137@N04 |3199  |09/03/13 |16:37:40 |2013-01-01 |1 |1 
9 |10000137@N04 |4  |09/03/13 |18:56:55 |2013-01-01 |2 |2 
10 |10000280@N07 |215  |02/08/07 |17:25:43 |2007-01-01 |1 |1 
11 |10000280@N07 |215  |03/08/07 |19:35:11 |2007-01-01 |2 |1 
12 |100006043@N02 |203  |05/08/13 |14:02:49 |2013-01-01 |1 |1 
13 |100006043@N02 |1  |05/08/13 |18:08:45 |2013-01-01 |2 |2 
14 |100010324@N02 |1  |14/04/13 |19:19:13 |2013-01-01 |1 |1 
15 |100010343@N03 |367  |04/06/14 |18:54:13 |2014-01-01 |1 |1 
16 |100014982@N03 |2909  |28/08/13 |23:20:27 |2013-01-01 |1 |1 
17 |100014982@N03 |183  |13/09/13 |12:26:41 |2013-01-01 |2 |2 
18 |100018928@N06 |1149  |01/08/13 |08:40:22 |2013-01-01 |1 |1 
19 |100018928@N06 |1149  |01/08/13 |08:40:23 |2013-01-01 |2 |1 
20 |100018928@N06 |1149  |01/08/13 |08:40:32 |2013-01-01 |3 |1 
21 |100018928@N06 |1149  |01/08/13 |08:40:33 |2013-01-01 |4 |1 
22 |100021169@N02 |10  |02/07/05 |18:17:26 |2005-01-01 |1 |1 
23 |100021169@N02 |10  |02/07/05 |18:18:13 |2005-01-01 |2 |1 
24 |10002296@N02 |25  |12/03/11 |13:41:10 |2011-01-01 |1 |1 
25 |10002296@N02 |25  |12/03/11 |13:42:19 |2011-01-01 |2 |1 
26 |10002296@N02 |25  |12/03/11 |14:00:49 |2011-01-01 |3 |1 
27 |10002296@N02 |25  |12/03/11 |14:07:57 |2011-01-01 |4 |1 
28 |10002296@N02 |25  |12/03/11 |14:10:12 |2011-01-01 |5 |1 
29 |10002450@N05 |105  |07/08/11 |02:43:45 |2011-01-01 |1 |1 
30 |10002450@N05 |5  |07/08/11 |05:19:27 |2011-01-01 |2 |2 
31 |100025689@N07 |966  |28/10/13 |20:19:05 |2013-01-01 |1 |1 
32 |100025689@N07 |966  |28/10/13 |20:35:38 |2013-01-01 |2 |1 
33 |100025689@N07 |966  |28/10/13 |20:35:55 |2013-01-01 |3 |1 
34 |100025689@N07 |966  |28/10/13 |21:09:53 |2013-01-01 |4 |1 
35 |100025689@N07 |966  |28/10/13 |21:27:50 |2013-01-01 |5 |1 
36 |100029993@N07 |831  |27/09/14 |18:27:24 |2014-01-01 |1 |1 
37 |100029993@N07 |3708  |09/10/14 |20:36:42 |2014-01-01 |2 |2 
38 |100033343@N05 |42  |31/10/14 |12:23:50 |2014-01-01 |1 |1 
39 |10003453@N03 |16  |28/08/09 |13:46:44 |2009-01-01 |1 |1 
40 |10003453@N03 |186  |28/08/09 |14:17:39 |2009-01-01 |2 |2 
41 |10003453@N03 |19  |28/08/09 |16:43:07 |2009-01-01 |3 |3 
42 |10003453@N03 |2919  |29/08/09 |12:18:10 |2009-01-01 |4 |4 
43 |10003453@N03 |2453  |29/08/09 |13:22:12 |2009-01-01 |5 |5 
44 |10003453@N03 |262  |29/08/09 |15:59:14 |2009-01-01 |6 |6 
45 |10003453@N03 |22  |30/08/09 |15:26:56 |2009-01-01 |7 |7 
46 |10003453@N03 |33  |30/08/09 |16:25:30 |2009-01-01 |8 |8 
47 |10003453@N03 |2914  |30/08/09 |21:29:39 |2009-01-01 |9 |9 
48 |10003453@N03 |408  |03/09/09 |23:36:12 |2009-01-01 |10 |10 
49 |10003453@N03 |133  |06/09/09 |21:57:03 |2009-01-01 |11 |11 
50 |10003453@N03 |713  |16/09/09 |00:01:53 |2009-01-01 |12 |12 

我使用DENSE_RANK函數嘗試，但我一直不成功。我非常感謝在創建location_rank列方面的幫助。

這裏是DENSE_RANK查詢，我已經試過unsuccesfully：

create table prep.location_rank2 as 
select 
    id, nsid, 
    location,date_taken,time_taken,date_trunc, rank, 
    dense_rank() over(
     partition by nsid, date_trunc 
     order by date_taken, time_taken, location, rank 
    ) as location_rank 
from prep.test 
order by nsid; 

Answer 1

SELECT id, 
     nsid, 
     location, 
     date_taken, 
     time_taken, 
     date_trunc, 
     [rank], 
     DENSE_RANK() OVER (PARTITION BY nsid, date_trunc 
           ORDER BY CASE WHEN [rank] = rnum 
              THEN location 
              ELSE CAST(CONCAT(CAST([rank]-rnum AS VARCHAR), CAST(location AS VARCHAR)) AS INT) 
             END) location_rank 
    FROM (SELECT *, 
       ROW_NUMBER() OVER (PARTITION BY nsid, date_trunc 
             ORDER BY location) rnum 
      FROM photo_trip 
     ) a 
ORDER BY id; 

結果

id nsid   location date_taken time_taken   date_trunc rank location_rank 
1 10000137@N04 11   2006-03-08 18:42:02.0000000 2006-03-06 1  1 
2 10000137@N04 11   2006-03-08 18:56:44.0000000 2006-03-06 2  1 
3 10000137@N04 446   2007-09-12 01:05:27.0000000 2007-09-10 1  1 
4 10000137@N04 4   2007-09-12 01:05:35.0000000 2007-09-10 2  2 
5 10000137@N04 4   2007-09-12 01:05:41.0000000 2007-09-10 3  2 
6 10000137@N04 56   2007-09-12 01:05:45.0000000 2007-09-10 4  3 
7 10000137@N04 11   2008-07-03 09:21:54.0000000 2008-06-30 1  1 
8 10000137@N04 3199  2013-03-09 16:37:40.0000000 2013-03-04 1  1 
9 10000137@N04 4   2013-03-09 18:56:55.0000000 2013-03-04 2  2 
10 10000280@N07 215   2007-08-02 17:25:43.0000000 2007-07-30 1  1 
11 10000280@N07 215   2007-08-03 19:35:11.0000000 2007-07-30 2  1 
12 100006043@N02 203   2013-08-05 14:02:49.0000000 2013-07-29 1  1 
13 100006043@N02 1   2013-08-05 18:08:45.0000000 2013-07-29 2  2 
14 100010324@N02 1   2013-04-14 19:19:13.0000000 2013-04-08 1  1 
15 100010343@N03 367   2014-06-04 18:54:13.0000000 2014-06-02 1  1 
16 100014982@N03 2909  2013-08-28 23:20:27.0000000 2013-08-26 1  1 
17 100014982@N03 183   2013-09-13 12:26:41.0000000 2013-09-09 1  1 
18 100018928@N06 1149  2013-08-01 08:40:22.0000000 2013-07-29 1  1 
19 100018928@N06 1149  2013-08-01 08:40:23.0000000 2013-07-29 2  1 
20 100018928@N06 1149  2013-08-01 08:40:32.0000000 2013-07-29 3  1 
21 100018928@N06 1149  2013-08-01 08:40:33.0000000 2013-07-29 4  1 
22 100021169@N02 10   2005-07-02 18:17:26.0000000 2005-06-27 1  1 
23 100021169@N02 10   2005-07-02 18:18:13.0000000 2005-06-27 2  1