回答編集履歴
3
typo
answer
CHANGED
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@@ -24,7 +24,7 @@
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create table cols(col varchar(10));
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insert into cols values('sales'),('budget'),('ratio');
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-
``
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+
```
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- とりあえず結合
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```SQL
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@@ -40,6 +40,7 @@
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```
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- 上記をもとに集計
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+
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```SQL
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select col
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,sum(1Q*val) as 1Q
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2
修正
answer
CHANGED
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@@ -8,23 +8,24 @@
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8
8
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- テーブル作成
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```SQL
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11
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+
/* 元データ */
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create table tbl(term varchar(10),team varchar(10),sales int, budget int,ratio double);
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insert into tbl values
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('1Q','teamA',100,200,0.5),
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('2Q','teamA',100,300,0.3333),
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('3Q','teamA',100,300,0.3333),
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('4Q','teamA',100,200,0.5);
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-
```
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-
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+
/* pivot作成 */
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-
```SQL
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-
create table pivot(
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create table pivot(term varchar(10),1Q int,2Q int,3Q int,4Q int);
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-
insert into pivot
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-
select
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insert into pivot select term,term='1Q' as 1q,term='2Q' as 2q,term='3Q' as 3q,term='4Q' as 4q from tbl;
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union all select 'budget',term,term='1Q' as 1q,term='2Q' as 2q,term='3Q' as 3q,term='4Q' as 4q from tbl
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-
union all select 'ratio',term,term='1Q' as 1q,term='2Q' as 2q,term='3Q' as 3q,term='4Q' as 4q from tbl
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-
```
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/* 横方向のデータ保持 */
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create table cols(col varchar(10));
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insert into cols values('sales'),('budget'),('ratio');
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``
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+
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- とりあえず結合
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```SQL
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select
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@@ -34,10 +35,11 @@
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when 'budget' then t2.budget
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when 'ratio' then t2.ratio
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end as val
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from (select * from pivot,cols) as t1 inner join
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-
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tbl as t2 on t1.term =t2.term ;
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```
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-
- 集計
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- 上記をもとに集計
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```SQL
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select col
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,sum(1Q*val) as 1Q
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@@ -52,9 +54,10 @@
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when 'budget' then t2.budget
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when 'ratio' then t2.ratio
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end as val
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from (select * from pivot,cols) as t1 inner join
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-
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tbl as t2 on t1.term =t2.term
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) sub
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group by col
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group by col;
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```
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1
sample
answer
CHANGED
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@@ -2,4 +2,61 @@
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2
2
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基本的に1Q~4Qのように型が違うもの（おそらくintとdouble）を
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3
3
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一緒に表示するのはデータの持ち方としておかしいと思います
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4
4
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5
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-
また命題のデータはteamが縦横変換されておらずピボットになっていません。
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5
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また命題のデータはteamが縦横変換されておらずピボットになっていません。
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6
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+
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7
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# pivotを使ったsample
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8
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9
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- テーブル作成
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10
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```SQL
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11
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create table tbl(term varchar(10),team varchar(10),sales int, budget int,ratio double);
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12
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insert into tbl values
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('1Q','teamA',100,200,0.5),
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('2Q','teamA',100,300,0.3333),
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('3Q','teamA',100,300,0.3333),
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('4Q','teamA',100,200,0.5);
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```
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18
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+
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19
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- pivot作成
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20
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```SQL
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21
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create table pivot(col varchar(10),term varchar(10),1Q int,2Q int,3Q int,4Q int);
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insert into pivot
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23
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select 'sales',term,term='1Q' as 1q,term='2Q' as 2q,term='3Q' as 3q,term='4Q' as 4q from tbl
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union all select 'budget',term,term='1Q' as 1q,term='2Q' as 2q,term='3Q' as 3q,term='4Q' as 4q from tbl
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25
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union all select 'ratio',term,term='1Q' as 1q,term='2Q' as 2q,term='3Q' as 3q,term='4Q' as 4q from tbl
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26
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```
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27
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+
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28
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+
- とりあえず結合
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29
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```SQL
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30
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select
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31
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t1.*,
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case t1.col
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when 'sales' then t2.sales
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34
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when 'budget' then t2.budget
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35
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when 'ratio' then t2.ratio
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end as val
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from pivot as t1 inner join tbl as t2 on t1.term =t2.term
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38
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```
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39
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+
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40
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- 集計
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41
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```SQL
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42
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select col
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43
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,sum(1Q*val) as 1Q
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44
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,sum(2Q*val) as 2Q
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45
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,sum(3Q*val) as 3Q
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46
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,sum(4Q*val) as 4Q
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47
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from(
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48
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select
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49
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t1.*,
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50
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case t1.col
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51
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when 'sales' then t2.sales
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52
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when 'budget' then t2.budget
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53
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when 'ratio' then t2.ratio
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54
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end as val
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55
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from pivot as t1 inner join tbl as t2 on t1.term =t2.term
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56
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) sub
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57
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group by col
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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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※前回も下記来ましたが結果としてteamを縦に書くのはロジックとしておかしいので
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62
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やっていません。
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