Question

我有一张表，当我对它运行此查询时

SELECT m.Id, m.DateOne, m.DateTwo, (SELECT IIF
  (c.ClubId = 1095 , x.CaptainOne , x.CaptainTwo)
FROM Match x
JOIN Player c on c.Id = x.CaptainOne
JOIN Player d on d.Id = x.CaptainTwo
WHERE x.Id = m.Id  ) AS Captain
FROM Match m
order by DateOne

给我一个看起来像这样的输出..

ID | DateOne    | DateTwo    | Captain
1  | 01/12/2015 |            | 1658
2  | 08/12/2015 |            | 1658
3  | 15/12/2015 | 22/12/2015 | 1658
4  | 02/01/2016 |            | 1703
5  | 09/01/2016 |            | 1703
6  | 16/01/2016 | 23/01/2016 | 1658
7  | 30/01/2016 |            | 1658
8  | 06/02/2016 |            | 1658
9  | 13/02/2016 |            | 1658
10 | 20/02/2016 |            | 1703

然后我想使用这些结果来进一步缩小输出，使其看起来像这样

Captain   | Date(Min)  | Date(Max)  | Count
1658      | 01/12/2015 | 22/12/2015 | 3
1703      | 02/01/2016 | 09/01/2016 | 2
1658      | 16/01/2016 | 13/02/2016 | 4
1703      | 20/02/2016 | 20/02/2016 | 1

在获取第一次出现的DateOne时创建连续队长的计数，如果DateTwo为最后一次出现的null，则为DateTwo或DateOne。

我希望这是有道理的.. 感谢

Sql计数连续值

0 个答案: