グループと追加の例外

Question

を持つためには、私は以下の表を持っています：

Select [Event] 
    ,[Start] 
    ,[End] 
    ,[Tag] 
    ,[Tag_new] = case when Tag='Big' and 'Small' = Lead(Tag,1,Tag) over (Partition By Event Order By Start) then 'Small' else tag end 
    From @YourTable 

    Event           Start   End    Tag Tag_new 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:44 9-9-16 10:49 Big Small 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:50 9-9-16 10:51 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 12:51 4-4-16 13:58 Big Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:04 4-4-16 14:29 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:51 4-4-16 14:58 Big Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:04 4-4-16 15:29 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:45 4-4-16 15:55 Big Big 
    11PIC41010.PV 11-PSV-401002W 11-PSV-401002D 4-4-16 16:04 4-4-16 16:45 Big Big 

が、以下のシーケンスがTag_new列はタグ欄に次の大きなまで、ビッグから始まる「Small2」である必要があり、グループ内のタグの列に表示されたときに私は1つの以上の例外を適用する必要があります。

Small 
    Big 
    Small 

と私が手を下回る結果としたいと思います：iamdaveする

Event           Start   End    Tag Tag_new 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:44 9-9-16 10:49 Big Small 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:50 9-9-16 10:51 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 12:51 4-4-16 13:58 Big Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:04 4-4-16 14:29 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:51 4-4-16 14:58 Big Small2 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:04 4-4-16 15:29 Small Small2 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:45 4-4-16 15:55 Big Big 
    11PIC41010.PV 11-PSV-401002W 11-PSV-401002D 4-4-16 16:04 4-4-16 16:45 Big Big 

アップデート：

私は大きな後にさらにいくつかの小さなを持って

が、それはビッグだけの小さなしばらくはそうSmall2必要があります後に第2小なりますそれは次のビッグまでSmall2する必要があります：

：

Declare @YourTable table ([Event] varchar(100),[Start] DateTime,[End] DateTime, [Tag] varchar(25)) 
Insert Into @YourTable values 
('10PIC700422.PV 10-PSV-700073A 10-PSV-700073B','9/9/16 10:44','9/9/16 10:49','Big'), 
('10PIC700422.PV 10-PSV-700073A 10-PSV-700073B','9/9/16 10:50','9/9/16 10:51','Small'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 12:51','4/4/16 13:58','Big'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 14:04','4/4/16 14:29','Small'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 14:51','4/4/16 14:58','Big'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 15:04','4/4/16 15:29','Small'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 15:30','4/4/16 15:32','Small'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4-4-16 15:45','4-4-16 15:55','Big'), 
('11PIC41010.PV 11-PSV-401002W 11-PSV-401002D','4/4/16 16:04','4/4/16 16:45','Big') 

そしてここでは、ビッグ後場合の出力数より小さく、 10

Event           Start   End    Tag Tag_new 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:44 9-9-16 10:49 Big Small 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:50 9-9-16 10:51 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 12:51 4-4-16 13:58 Big Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:04 4-4-16 14:29 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:51 4-4-16 14:58 Big Small2 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:04 4-4-16 15:29 Small Small2 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:30 4-4-16 15:32 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:45 4-4-16 15:55 Big Big 
    11PIC41010.PV 11-PSV-401002W 11-PSV-401002D 4-4-16 16:04 4-4-16 16:45 Big Big 

、それは以下のようにする必要があります：

Event           Start   End    Tag Tag_new 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:44 9-9-16 10:49 Big Small 
    10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 9-9-16 10:50 9-9-16 10:51 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 12:51 4-4-16 13:58 Big Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:04 4-4-16 14:29 Small Small 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 14:51 4-4-16 14:58 Big Small2 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:04 4-4-16 15:29 Small Small2 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:30 4-4-16 15:32 Small Small2 
    11PIC41010.PV 11-PSV-401002A 11-PSV-401002B 4-4-16 15:45 4-4-16 15:55 Big Big 
    11PIC41010.PV 11-PSV-401002W 11-PSV-401002D 4-4-16 16:04 4-4-16 16:45 Big Big 

アップデート@iamdave：私はその下にいくつかのシーケンスを持っている場合small2を与えるので、この混乱のために再び 申し訳ありませんが、それはsmall2に変化するようでは、間違った方向でした

Small 
Big 
Small 
Small 
Big 
Small 

これは私が得るものです：：すべてのしばらくの間、私はそれらを分離するために探していた

         Event Start     End      Tag Tag_new 
10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 2016-09-09 10:44:05.000 2016-09-09 10:48:08.000 Big Big 
10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 2016-09-09 10:44:10.000 2016-09-09 10:49:40.000 Big Small 
10PIC700422.PV 10-PSV-700073A 10-PSV-700073B 2016-09-09 10:50:03.000 2016-09-09 10:51:04.000 Small Small 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 12:51:07.000 2016-04-04 13:58:09.000 Big Small 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 14:04:04.000 2016-04-04 14:29:00.000 Small Small 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 14:51:02.000 2016-04-04 14:58:00.000 Big Small2 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 15:04:06.000 2016-04-04 15:29:08.000 Small Small2 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 15:45:08.000 2016-04-04 15:55:09.000 Big Small2 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 16:22:08.000 2016-04-04 16:40:09.000 Small Small2 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 16:50:04.000 2016-04-04 16:55:00.000 Small Small2 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 17:05:02.000 2016-04-04 17:20:00.000 Big Small2 
11PIC41010.PV 11-PSV-401002A 11-PSV-401002B  2016-04-04 17:22:06.000 2016-04-04 17:29:08.000 Small Small2 
11PIC41010.PV 11-PSV-401002W 11-PSV-401002D  2016-04-04 16:04:01.000 2016-04-04 16:45:00.000 Big Big 

ので、最善の解決策は、私は私の最近の問題で説明したように、追加の行を追加し、次のようになります。支援のため事前に

おかげで、 S

Answer 1

これはかなり醜いですが、私はそれは何が必要ないと思いますそれは？

あなたの更新に応じて

Declare @YourTable table ([Event] varchar(100),[Start] DateTime,[End] DateTime, [Tag] varchar(25)) 
Insert Into @YourTable values 
('10PIC700422.PV 10-PSV-700073A 10-PSV-700073B','9/9/16 10:44','9/9/16 10:48','Big'), 
('10PIC700422.PV 10-PSV-700073A 10-PSV-700073B','9/9/16 10:44','9/9/16 10:49','Big'), 
('10PIC700422.PV 10-PSV-700073A 10-PSV-700073B','9/9/16 10:50','9/9/16 10:51','Small'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 12:51','4/4/16 13:58','Big'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 14:04','4/4/16 14:29','Small'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 14:51','4/4/16 14:58','Big'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 15:04','4/4/16 15:29','Small'), 
('11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4-4-16 15:45','4-4-16 15:55','Big'), 
('11PIC41010.PV 11-PSV-401002W 11-PSV-401002D','4/4/16 16:04','4/4/16 16:45','Big'); 


Select [Event] 
    ,[Start] 
    ,[End] 
    ,[Tag] 
    ,[Tag_new] = case when Tag = 'Big' 
            and Lead(Tag,1,'') over (Partition By Event 
                  Order By Start 
                  ) 
            = 'Small' 
           then 'Small' 
           else tag 
           end 

    ,[Tag_new2] = case when (Tag = 'Big' 
          and lag(Tag,1,'') over (Partition By Event 
                 Order By Start 
                 ) 
           = 'Small' 
          and Lead(Tag,1,'') over (Partition By Event 
                 Order By Start 
                 ) 
           = 'Small' 
         ) 

         or (Tag = 'Small' 
          and lag(Tag,2,'') over (Partition By Event 
                Order By Start 
                ) 
           = 'Small' 
          and lag(Tag,1,'') over (Partition By Event 
                Order By Start 
                ) 
           = 'Big' 
          ) 
        then 'Small2' 
        else case when Tag = 'Big' 
            and Lead(Tag,1,'') over (Partition By Event 
                  Order By Start 
                  ) 
            = 'Small' 
           then 'Small' 
           else tag 
           end 
        end 

    From @YourTable; 

---

、そしてあなたのステージングテーブルにいくつかの列を追加することができます仮定：

Declare @YourTable table (EventRN int, StartRN int, MaxStartRN int, [Event] varchar(100),[Start] DateTime,[End] DateTime, [Tag] varchar(25), [TagNext] varchar(25)) 
Insert Into @YourTable values 
(null,null,null,'10PIC700422.PV 10-PSV-700073A 10-PSV-700073B','9/9/16 10:44','9/9/16 10:49','Big',null), 
(null,null,null,'10PIC700422.PV 10-PSV-700073A 10-PSV-700073B','9/9/16 10:50','9/9/16 10:51','Small',null), 
(null,null,null,'11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 12:51','4/4/16 13:58','Big',null), 
(null,null,null,'11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 14:04','4/4/16 14:29','Small',null), 
(null,null,null,'11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 14:51','4/4/16 14:58','Big',null), 
(null,null,null,'11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 15:04','4/4/16 15:29','Small',null), 
(null,null,null,'11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4/4/16 15:30','4/4/16 15:32','Small',null), 
(null,null,null,'11PIC41010.PV 11-PSV-401002A 11-PSV-401002B','4-4-16 15:45','4-4-16 15:55','Big',null), 
(null,null,null,'11PIC41010.PV 11-PSV-401002W 11-PSV-401002D','4/4/16 16:04','4/4/16 16:45','Big',null); 


update t 
set EventRN = tt.EventRN 
    ,StartRN = tt.StartRN 
    ,MaxStartRN = tt.MaxStartRN 
    ,TagNext = tt.TagNext 
from @YourTable t 
    inner join (
       select dense_rank() over (order by Event 
             ) as EventRN 
        ,row_number() over (partition by Event 
             order by Start 
             ) as StartRN 
        ,count(1) over (partition by Event) as MaxStartRN 
        ,[Event] 
        ,[Start] 
        ,[End] 
        ,[Tag] 
        ,lead(Tag,1,null) over (partition by Event 
                 order by Start 
                 ) 
         as TagNext 
       from @YourTable 
      ) tt 
     on(t.[Event] = tt.[Event] 
      and t.[Start] = tt.[Start] 
      and t.[End] = tt.[End] 
      and t.Tag = tt.Tag 
      ); 

with cte as 
(
    select EventRN 
     ,StartRN 
     ,MaxStartRN 
     ,[Event] 
     ,[Start] 
     ,[End] 
     ,Tag 
     ,TagNext 
     ,cast(null as varchar(25)) as TagPrev 

     ,case when TagNext = 'Small' 
         then TagNext 
         else Tag 
         end as TagNew 
    from @YourTable 
    where EventRN = 1 
     and StartRN = 1 

    union all 

    select t.EventRN 
     ,t.StartRN 
     ,t.MaxStartRN 
     ,t.[Event] 
     ,t.[Start] 
     ,t.[End] 
     ,t.Tag 
     ,t.TagNext 
     ,case when t.EventRN = c.EventRN then c.Tag else null end as TagPrev 

     ,case when t.EventRN = c.EventRN and c.Tag = 'Small' and t.Tag = 'Big' and t.TagNext = 'Small' 
       or t.EventRN = c.EventRN and c.TagNew = 'Small2' and t.Tag = 'Small' 
      then 'Small2' 
      else case when t.TagNext = 'Small' 
         then t.TagNext 
         else t.Tag 
         end 
      end 
    from cte c 
     inner join @YourTable t 
      on((c.StartRN < c.MaxStartRN 
       and t.EventRN = c.EventRN 
       and t.StartRN = c.StartRN+1 
       ) 
       or (c.StartRN = c.MaxStartRN 
        and t.EventRN = c.EventRN+1 
        and t.StartRN = 1 
        ) 
       ) 
) 
select [Event] 
     ,[Start] 
     ,[End] 
     ,Tag 
     ,TagNew 
from cte 
order by Event 
     ,Start;