回答編集履歴
2
調整
test
CHANGED
|
@@ -6,7 +6,7 @@
|
|
|
6
6
|
StartDT datetime,
|
|
7
7
|
dist int,
|
|
8
8
|
d date as( StartDT - interval 8 hour),
|
|
9
|
-
index (dist,
|
|
9
|
+
index (dist,d)
|
|
10
10
|
);
|
|
11
11
|
|
|
12
12
|
insert into tbl(StartDT,dist) values
|
1
調整
test
CHANGED
|
@@ -1 +1,31 @@
|
|
|
1
1
|
datetimeから8時間引いた日付で集計すればよいでしょう
|
|
2
|
+
集計用の生成列を予め用意するとより効率的です
|
|
3
|
+
|
|
4
|
+
```SQL
|
|
5
|
+
create table tbl (id int primary key auto_increment,
|
|
6
|
+
StartDT datetime,
|
|
7
|
+
dist int,
|
|
8
|
+
d date as( StartDT - interval 8 hour),
|
|
9
|
+
index (dist,StartDT)
|
|
10
|
+
);
|
|
11
|
+
|
|
12
|
+
insert into tbl(StartDT,dist) values
|
|
13
|
+
('2023-11-01 08:30',10),
|
|
14
|
+
('2023-11-01 09:00',5),
|
|
15
|
+
('2023-11-01 10:00',15),
|
|
16
|
+
('2023-11-02 08:30',20),
|
|
17
|
+
('2023-11-02 11:00',5),
|
|
18
|
+
('2023-11-02 14:00',30),
|
|
19
|
+
('2023-11-02 16:00',10),
|
|
20
|
+
('2023-11-03 02:00',30),
|
|
21
|
+
('2023-11-03 04:00',10),
|
|
22
|
+
('2023-11-03 14:00',10),
|
|
23
|
+
('2023-11-04 06:00',30),
|
|
24
|
+
('2023-11-04 08:00',10),
|
|
25
|
+
('2023-11-04 10:00',30),
|
|
26
|
+
('2023-11-04 15:00',10);
|
|
27
|
+
|
|
28
|
+
select d,sum(dist) from tbl
|
|
29
|
+
where d between '2023-11-02' and '2023-11-04'
|
|
30
|
+
group by d
|
|
31
|
+
```
|