回答編集履歴
1
修正
test
CHANGED
|
@@ -25,3 +25,25 @@
|
|
|
25
25
|
left join tbl as t3 on t1.time=t3.time+2
|
|
26
26
|
|
|
27
27
|
```
|
|
28
|
+
|
|
29
|
+
|
|
30
|
+
|
|
31
|
+
- 追記
|
|
32
|
+
|
|
33
|
+
よくよく考えるとこうすると効率的かもしれません
|
|
34
|
+
|
|
35
|
+
```SQL
|
|
36
|
+
|
|
37
|
+
select t1.time,
|
|
38
|
+
|
|
39
|
+
(select avg(usd_rate) from tbl as t2
|
|
40
|
+
|
|
41
|
+
where t2.time between t1.time -2 and t1.time
|
|
42
|
+
|
|
43
|
+
having count(*)>2) as usd_avg
|
|
44
|
+
|
|
45
|
+
from tbl as t1;
|
|
46
|
+
|
|
47
|
+
```
|
|
48
|
+
|
|
49
|
+
※それもこれもtimeが連続している前提です
|