我有一张表格，其中的数据格式为
+---------------------+-------------------------------------+--------+
| Start Time | Name | Result |
+---------------------+-------------------------------------+--------+
| 19/09/2018 00:02:06 | Kevin Jones | WIN |
| 19/09/2018 00:21:44 | Claire Miley | LOSE |
| 19/09/2018 01:07:54 | Claire Miley | FISH |
| 19/09/2018 01:16:40 | Kevin Jones | WIN |
| 19/09/2018 01:14:01 | Kevin Jones | RED |
| 19/09/2018 01:11:12 | Claire Miley | LOSE |
| 19/09/2018 01:28:37 | Claire Miley | LOSE |
| 19/09/2018 01:09:42 | Kevin Jones | LOSE |
| 19/09/2018 01:05:50 | Kevin Jones | WIN |
| 19/09/2018 01:29:52 | Martyn Jones | BLUE |
| 19/09/2018 01:01:01 | Claire Miley | RED |
| 19/09/2018 01:00:21 | Claire Miley | WIN |
| 19/09/2018 00:57:01 | Kevin Jones | SOCK |
| 19/09/2018 01:39:52 | Margaret Weir | WIN |
| 19/09/2018 00:54:06 | Margaret Weir | CALL |
| 19/09/2018 00:53:16 | Martyn Jones | LOSE |
| 19/09/2018 00:50:47 | Kevin Jones | FREE |
| 19/09/2018 00:48:40 | Martyn Jones | WIN |
| 19/09/2018 00:30:14 | Claire Miley | WIN |
| 19/09/2018 00:25:09 | Kevin Jones | LOSE |
| 19/09/2018 02:07:20 | Margaret Weir | FISH |
| 19/09/2018 02:07:30 | Martyn Jones | WIN |
| 19/09/2018 02:09:03 | Kevin Jones | RED |
| 19/09/2018 00:24:11 | Claire Miley | LOSE |
| 19/09/2018 00:17:42 | Kevin Jones | LOSE |
| 19/09/2018 02:15:21 | Kevin Jones | LOSE |
| 19/09/2018 02:19:10 | Martyn Jones | WIN |
| 19/09/2018 00:15:49 | Martyn Jones | BLUE |
| 19/09/2018 00:14:25 | Kevin Jones | RED |
| 19/09/2018 00:11:03 | Kevin Jones | WIN |
| 19/09/2018 00:10:10 | Claire Miley | SOCK |
| 19/09/2018 00:09:56 | Martyn Jones | WIN |
| 19/09/2018 00:05:24 | Martyn Jones | CALL |
| 19/09/2018 00:03:01 | Margaret Weir | LOSE |
| 19/09/2018 00:01:17 | Martyn Jones | FREE |
| 19/09/2018 01:18:46 | Kevin Jones | WIN |
| 19/09/2018 01:23:21 | Margaret Weir | WIN |
| 19/09/2018 01:28:51 | Kevin Jones | BLUE |
| 19/09/2018 01:29:34 | Kevin Jones | RED |
| 19/09/2018 01:07:54 | Claire Miley | WIN |
+---------------------+-------------------------------------+--------+
有更多对问题不重要的列。我想弄清楚的是，谁目前拥有最长的连胜纪录，而其中一个不是WIN结果，以及连胜纪录的持续时间。这是我可以在SQL中做的事情，还是将原始数据提取到另一个程序后最好做？
在此示例数据中，我想要的结果是
Kevin Jones
5 results in a row without a WIN result
感谢马丁·史密斯
答案 0 :(得分：1)
应该这样做（Demo）
WITH T
AS (SELECT *,
ROW_NUMBER()
OVER (
PARTITION BY [Name]
ORDER BY [Start Time]) - ROW_NUMBER()
OVER (
PARTITION BY [Name], Win
ORDER BY [Start Time]) AS Grp
FROM Table1
CROSS APPLY (SELECT IIF([Result] = 'WIN', 1, 0))CA(Win))
SELECT TOP 1 [Name],
count(*),
MIN([Start Time]) AS StreakStart,
MAX([Start Time]) AS StreakEnd
FROM T
WHERE Win = 0
GROUP BY [Name],
Grp
ORDER BY count(*) DESC
答案 1 :(得分：1)
看看这个解决方案：
SELECT TOP 1 Name, COUNT(*)-1 Total FROM
(
SELECT *, SUM(CASE WHEN Result='WIN' THEN 1 ELSE 0 END) OVER (PARTITION BY Name ORDER BY Start) Streak
FROM #t
) T
GROUP BY Name,Streak
ORDER BY Total DESC
每个WIN都会开始新的群组。这样，结果就是第1组中的项目数。
要查看演示，请运行以下命令：
--CREATE TABLE #t
--(
-- Start datetime,
-- Name varchar(20),
-- Result varchar(10)
--)
--INSERT #t VALUES
--('2018/09/19 00:02:06', 'Kevin Jones ', 'WIN '),
--('2018/09/19 00:21:44', 'Claire Miley ', 'LOSE'),
--('2018/09/19 01:07:54', 'Claire Miley ', 'FISH'),
--('2018/09/19 01:16:40', 'Kevin Jones ', 'WIN '),
--('2018/09/19 01:14:01', 'Kevin Jones ', 'RED '),
--('2018/09/19 01:11:12', 'Claire Miley ', 'LOSE'),
--('2018/09/19 01:28:37', 'Claire Miley ', 'LOSE'),
--('2018/09/19 01:09:42', 'Kevin Jones ', 'LOSE'),
--('2018/09/19 01:05:50', 'Kevin Jones ', 'WIN '),
--('2018/09/19 01:29:52', 'Martyn Jones ', 'BLUE'),
--('2018/09/19 01:01:01', 'Claire Miley ', 'RED '),
--('2018/09/19 01:00:21', 'Claire Miley ', 'WIN '),
--('2018/09/19 00:57:01', 'Kevin Jones ', 'SOCK'),
--('2018/09/19 01:39:52', 'Margaret Weir', 'WIN '),
--('2018/09/19 00:54:06', 'Margaret Weir', 'CALL'),
--('2018/09/19 00:53:16', 'Martyn Jones ', 'LOSE'),
--('2018/09/19 00:50:47', 'Kevin Jones ', 'FREE'),
--('2018/09/19 00:48:40', 'Martyn Jones ', 'WIN '),
--('2018/09/19 00:30:14', 'Claire Miley ', 'WIN '),
--('2018/09/19 00:25:09', 'Kevin Jones ', 'LOSE'),
--('2018/09/19 02:07:20', 'Margaret Weir', 'FISH'),
--('2018/09/19 02:07:30', 'Martyn Jones ', 'WIN '),
--('2018/09/19 02:09:03', 'Kevin Jones ', 'RED '),
--('2018/09/19 00:24:11', 'Claire Miley ', 'LOSE'),
--('2018/09/19 00:17:42', 'Kevin Jones ', 'LOSE'),
--('2018/09/19 02:15:21', 'Kevin Jones ', 'LOSE'),
--('2018/09/19 02:19:10', 'Martyn Jones ', 'WIN '),
--('2018/09/19 00:15:49', 'Martyn Jones ', 'BLUE'),
--('2018/09/19 00:14:25', 'Kevin Jones ', 'RED '),
--('2018/09/19 00:11:03', 'Kevin Jones ', 'WIN '),
--('2018/09/19 00:10:10', 'Claire Miley ', 'SOCK'),
--('2018/09/19 00:09:56', 'Martyn Jones ', 'WIN '),
--('2018/09/19 00:05:24', 'Martyn Jones ', 'CALL'),
--('2018/09/19 00:03:01', 'Margaret Weir', 'LOSE'),
--('2018/09/19 00:01:17', 'Martyn Jones ', 'FREE'),
--('2018/09/19 01:18:46', 'Kevin Jones ', 'WIN '),
--('2018/09/19 01:23:21', 'Margaret Weir', 'WIN '),
--('2018/09/19 01:28:51', 'Kevin Jones ', 'BLUE'),
--('2018/09/19 01:29:34', 'Kevin Jones ', 'RED '),
--('2018/09/19 01:07:54', 'Claire Miley ', 'WIN ')