回答編集履歴
1
追記
answer
CHANGED
@@ -18,4 +18,57 @@
|
|
18
18
|
,sum(val*(indicator='users')) as users
|
19
19
|
from daily_kpi
|
20
20
|
group by dt;
|
21
|
+
```
|
22
|
+
|
23
|
+
# 追記
|
24
|
+
indicatorを別途マスター管理し、表示順を確定すればprocedureを利用できます
|
25
|
+
- 元テーブル
|
26
|
+
```SQL
|
27
|
+
create table daily_kpi(dt date,id int ,val int);
|
28
|
+
insert into daily_kpi values
|
29
|
+
('2017-01-01',1,1800),
|
30
|
+
('2017-01-01',2,500),
|
31
|
+
('2017-01-01',3,200),
|
32
|
+
('2017-01-02',1,2000),
|
33
|
+
('2017-01-02',2,700),
|
34
|
+
('2017-01-02',3,250);
|
35
|
+
|
36
|
+
create table indicator(id int primary key,name varchar(20));
|
37
|
+
insert into indicator values
|
38
|
+
(1,'impressions'),
|
39
|
+
(2,'sessions'),
|
40
|
+
(3,'users');
|
41
|
+
```
|
42
|
+
- procedure作成
|
43
|
+
```SQL
|
44
|
+
drop procedure if exists yokogaki;
|
45
|
+
delimiter //
|
46
|
+
create procedure yokogaki()
|
47
|
+
begin
|
48
|
+
declare a int;
|
49
|
+
declare b varchar(255);
|
50
|
+
declare done int default 0;
|
51
|
+
declare cur cursor for
|
52
|
+
select id,name from indicator order by id;
|
53
|
+
declare continue handler for sqlstate '02000' set done=1;
|
54
|
+
set @sql='select dt';
|
55
|
+
open cur;
|
56
|
+
repeat
|
57
|
+
fetch cur into a,b;
|
58
|
+
if not done then
|
59
|
+
set @sql=CONCAT(@sql,",sum(val*(id=",a,")) as ",b);
|
60
|
+
end if;
|
61
|
+
until done end repeat;
|
62
|
+
close cur;
|
63
|
+
set @sql=CONCAT(@sql," from daily_kpi group by dt order by id");
|
64
|
+
prepare stmt from @sql;
|
65
|
+
execute stmt;
|
66
|
+
end
|
67
|
+
//
|
68
|
+
delimiter ;
|
69
|
+
```
|
70
|
+
- 実行
|
71
|
+
```SQL
|
72
|
+
|
73
|
+
call yokogaki;
|
21
74
|
```
|