回答編集履歴
7
同じrpmに対応するよう変更
test
CHANGED
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@@ -26,7 +26,7 @@
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rpmの最大をピークとして、ピークまでとピーク以降に分割、rpmはピッチ毎に分割し、
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-
そのデータ内の最大のrpmのデータに間引く。（※前提として連続して同じrpmは無し）
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そのデータ内の最大のrpmのデータに間引く。（~~※前提として連続して同じrpmは無し~~）
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試してはいませんが、上記仕様で組み立てたSQLです。
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@@ -34,7 +34,7 @@
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with base as (
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-
select *, (select time from tbl where rpm =(select max(rpm) from tbl)) as peak_time
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select *, (select max(time) from tbl where rpm =(select max(rpm) from tbl)) as peak_time
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from tbl
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@@ -42,7 +42,7 @@
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, blocking as (
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select *, case when time<=peak_time then 0 else 1 end as peak_block, (rpm / 400) as rpm_block
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select *, case when time<=peak_time then 0 else 1 end as peak_block, FLOOR(rpm / 400) as rpm_block
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from base
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@@ -52,9 +52,11 @@
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from blocking src
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where
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where time = (
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select max(time) from tbl
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select max(rpm) from blocking where peak_block=src.peak_block and rpm_block=src.rpm_block
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where rpm=(select max(rpm) from blocking where peak_block=src.peak_block and rpm_block=src.rpm_block)
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)
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@@ -72,9 +74,9 @@
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select *
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, case when rpm - lag(rpm, 1, 0) over(order by time) > 0 then 0 else 1 end as peak_block
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, case when rpm - lag(rpm, 1, 0) over(order by time) >= 0 then 0 else 1 end as peak_block
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, (rpm / 400) as rpm_block
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, FLOOR(rpm / 400) as rpm_block
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from tbl
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@@ -84,9 +86,11 @@
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from blocking src
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where
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where time = (
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select max(time) from tbl
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select max(rpm) from blocking where peak_block=src.peak_block and rpm_block=src.rpm_block
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where rpm=(select max(rpm) from blocking where peak_block=src.peak_block and rpm_block=src.rpm_block)
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)
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6
修正
test
CHANGED
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@@ -72,7 +72,7 @@
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select *
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, case when rpm - lag(rpm) over(order by time) > 0 then 0 else 1 end as peak_block
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, case when rpm - lag(rpm, 1, 0) over(order by time) > 0 then 0 else 1 end as peak_block
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, (rpm / 400) as rpm_block
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5
追記
test
CHANGED
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@@ -59,3 +59,35 @@
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)
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```
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追記2
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--
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[lag](https://docs.microsoft.com/ja-jp/sql/t-sql/functions/lag-transact-sql?view=sql-server-2017)を使用した別パターン
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```SQL
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with blocking as (
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select *
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+
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+
, case when rpm - lag(rpm) over(order by time) > 0 then 0 else 1 end as peak_block
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+
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+
, (rpm / 400) as rpm_block
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from tbl
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)
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select *
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from blocking src
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where rpm = (
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select max(rpm) from blocking where peak_block=src.peak_block and rpm_block=src.rpm_block
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)
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```
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4
追記
test
CHANGED
|
@@ -26,7 +26,7 @@
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26
26
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27
27
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rpmの最大をピークとして、ピークまでとピーク以降に分割、rpmはピッチ毎に分割し、
|
|
28
28
|
|
|
29
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-
そのデータ内の最大のrpmのデータに間引く。
|
|
29
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+
そのデータ内の最大のrpmのデータに間引く。（※前提として連続して同じrpmは無し）
|
|
30
30
|
|
|
31
31
|
試してはいませんが、上記仕様で組み立てたSQLです。
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32
32
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3
修正
test
CHANGED
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@@ -54,7 +54,7 @@
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54
54
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55
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where rpm = (
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56
56
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57
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-
select max(rpm) from blocking where peak_block=src.peak_block and
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+
select max(rpm) from blocking where peak_block=src.peak_block and rpm_block=src.rpm_block
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58
58
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59
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)
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60
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2
SQL修正
test
CHANGED
|
@@ -42,7 +42,7 @@
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42
42
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|
43
43
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, blocking as (
|
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44
44
|
|
|
45
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-
select *,
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|
45
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+
select *, case when time<=peak_time then 0 else 1 end as peak_block, (rpm / 400) as rpm_block
|
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46
46
|
|
|
47
47
|
from base
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48
48
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|
|
@@ -54,7 +54,7 @@
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|
54
54
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55
55
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where rpm = (
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56
56
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57
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-
select max(rpm) from blocking where peak_block=src.peak_block
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57
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+
select max(rpm) from blocking where peak_block=src.peak_block and rpm_block=src.rpm_block
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58
58
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59
59
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)
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60
60
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1
追記
test
CHANGED
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@@ -17,3 +17,45 @@
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こういった関数を使用せず、それでも一括で行うなら、テンポラリーテーブルを特定のピッチ刻みで作成する事になるかと思います。
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※ユニオンクエリーを行数分動的に作成するという、スマートではない方法も考えられますが。
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+
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+
追記
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24
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+
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|
25
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+
--
|
|
26
|
+
|
|
27
|
+
rpmの最大をピークとして、ピークまでとピーク以降に分割、rpmはピッチ毎に分割し、
|
|
28
|
+
|
|
29
|
+
そのデータ内の最大のrpmのデータに間引く。
|
|
30
|
+
|
|
31
|
+
試してはいませんが、上記仕様で組み立てたSQLです。
|
|
32
|
+
|
|
33
|
+
```SQL
|
|
34
|
+
|
|
35
|
+
with base as (
|
|
36
|
+
|
|
37
|
+
select *, (select time from tbl where rpm =(select max(rpm) from tbl)) as peak_time
|
|
38
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+
|
|
39
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+
from tbl
|
|
40
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+
|
|
41
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+
)
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|
42
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+
|
|
43
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+
, blocking as (
|
|
44
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+
|
|
45
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+
select *, (time<=peak_time) as peak_block, (rpm / 400) as rpm_block
|
|
46
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+
|
|
47
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+
from base
|
|
48
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+
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49
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+
)
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50
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+
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51
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+
select *
|
|
52
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+
|
|
53
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+
from blocking src
|
|
54
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+
|
|
55
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+
where rpm = (
|
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56
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+
|
|
57
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+
select max(rpm) from blocking where peak_block=src.peak_block, rpm_block=src.rpm_block
|
|
58
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+
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59
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+
)
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60
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+
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61
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+
```
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