Sql server 有条件运行的sql server
我打篮球,想在一定条件下记下我的分数。我从不在周六或周日比赛,虽然我不是每周都打 如果我错过了一周一天的训练,我的记录就会重置。如果我输了,我的反弹会重新开始。如果我在周五赢了,下周一又赢了,我的记录应该会继续 以下是一个示例结果集:Sql server 有条件运行的sql server,sql-server,sql-server-2014,Sql Server,Sql Server 2014,我打篮球,想在一定条件下记下我的分数。我从不在周六或周日比赛,虽然我不是每周都打 如果我错过了一周一天的训练,我的记录就会重置。如果我输了,我的反弹会重新开始。如果我在周五赢了,下周一又赢了,我的记录应该会继续 以下是一个示例结果集: | Date | Points | Won_Flag | Tally | |------------|--------|----------|-------| | 2015-07-23 | 18 | false | 0 | | 2
| Date | Points | Won_Flag | Tally |
|------------|--------|----------|-------|
| 2015-07-23 | 18 | false | 0 |
| 2015-07-24 | 7 | true | 7 |
| 2015-07-28 | 10 | true | 10 |
| 2015-07-29 | 20 | true | 30 |
| 2015-07-30 | 11 | false | 0 |
| 2015-07-31 | 18 | true | 18 |
| 2015-08-01 | 31 | true | 31 |
| 2015-09-14 | 0 | false | 0 |
| 2015-09-15 | 8 | true | 8 |
| 2015-09-16 | 13 | false | 0 |
| 2015-09-17 | 9 | true | 9 |
| 2015-09-18 | 1 | true | 10 |
| 2015-09-21 | 7 | true | 17 |
| 2015-09-22 | 15 | false | 0 |
| 2015-10-01 | 9 | false | 0 |
| 2015-10-02 | 5 | true | 5 |
| 2015-10-05 | 14 | true | 19 |
| 2015-10-13 | 3 | true | 3 |
| 2015-10-14 | 14 | true | 17 |
| 2015-10-15 | 12 | true | 29 |
| 2015-10-16 | 8 | true | 37 |
您可以使用累积和和
lag()。使用lag()
确定理货是否需要重新开始。然后累积此标志以获取可用于累积和的组标识符:
select t.*, sum(tally) over (partition by grp order by date) as cumeTally
from (select t.*, sum(tallyStartFlag) over (order by date) as grp
from (select t.*,
(case when lag(date) over (order by date)) = datedd(day, -1, date) and
datename(weekday, date) in ('Tuesday', 'Wednesday', 'Thursday', 'Friday')
then 0
when lag(date) over (order by date) = dateadd(day, -3, date) and
datename(weekday, date) = 'Monday'
then 0
else 1
end) as tallyStartFlag
from t
) t
) t;
周末的处理有点棘手
编辑:
我错过了关于失败的部分。这很容易合并:
select t.*, sum(case when won_flag then tally else 0 end) over (partition by grp order by date) as cumeTally
from (select t.*, sum(tallyStartFlag) over (order by date) as grp
from (select t.*,
(case when won_flag = false
then 0
when lag(date) over (order by date)) = datedd(day, -1, date) and
datename(weekday, date) in ('Tuesday', 'Wednesday', 'Thursday', 'Friday')
then 0
when lag(date) over (order by date) = dateadd(day, -3, date) and
datename(weekday, date) = 'Monday'
then 0
else 1
end) as tallyStartFlag
from t
) t
) t;
您可以使用累积和和lag()。使用lag()
确定理货是否需要重新开始。然后累积此标志以获取可用于累积和的组标识符:
select t.*, sum(tally) over (partition by grp order by date) as cumeTally
from (select t.*, sum(tallyStartFlag) over (order by date) as grp
from (select t.*,
(case when lag(date) over (order by date)) = datedd(day, -1, date) and
datename(weekday, date) in ('Tuesday', 'Wednesday', 'Thursday', 'Friday')
then 0
when lag(date) over (order by date) = dateadd(day, -3, date) and
datename(weekday, date) = 'Monday'
then 0
else 1
end) as tallyStartFlag
from t
) t
) t;
周末的处理有点棘手
编辑:
我错过了关于失败的部分。这很容易合并:
select t.*, sum(case when won_flag then tally else 0 end) over (partition by grp order by date) as cumeTally
from (select t.*, sum(tallyStartFlag) over (order by date) as grp
from (select t.*,
(case when won_flag = false
then 0
when lag(date) over (order by date)) = datedd(day, -1, date) and
datename(weekday, date) in ('Tuesday', 'Wednesday', 'Thursday', 'Friday')
then 0
when lag(date) over (order by date) = dateadd(day, -3, date) and
datename(weekday, date) = 'Monday'
then 0
else 1
end) as tallyStartFlag
from t
) t
) t;
您应该编辑您的问题并将示例数据和所需结果作为文本放在问题中(在行首使用“{}”或四个空格设置格式)。您应该编辑问题并将示例数据和所需结果作为文本放在问题中(在行首使用“{}”或四个空格设置格式)。有一些语法错误。是正确的版本。它不能解决问题,imho。有一些调整。有一些语法错误。是正确的版本。它不能解决问题,imho。有一些调整。