回答編集履歴
1
そのまま試せるようにおまけつき
test
CHANGED
@@ -79,3 +79,89 @@
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sumchange;
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```
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```text
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userid | start | end | a | b | c
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--------+---------------------+---------------------+---+---+---
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user1 | 2020-01-01 00:00:00 | 2020-01-01 00:01:00 | 0 | 0 | 0
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user1 | 2020-01-01 00:02:00 | 2020-01-01 00:02:00 | 0 | 1 | 0
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user1 | 2020-01-01 00:03:00 | 2020-01-01 00:04:00 | 0 | 0 | 0
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user1 | 2020-01-01 00:05:00 | 2020-01-01 00:06:00 | 0 | 1 | 0
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user2 | 2020-01-01 00:00:00 | 2020-01-01 00:02:00 | 0 | 0 | 0
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user2 | 2020-01-01 00:03:00 | 2020-01-01 00:04:00 | 1 | 0 | 0
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user2 | 2020-01-01 00:05:00 | 2020-01-01 00:06:00 | 0 | 0 | 0
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(7 rows)
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```
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### おまけ
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#### DDL
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```sql
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create table sample(
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userid varchar(10),
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record_date timestamp,
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a numeric(1),
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b numeric(1),
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c numeric(1),
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primary key(userid, record_date)
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);
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```
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#### データ投入
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```sql
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insert into sample values ('user1','2020/1/1 00:00:00',0,0,0);
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insert into sample values ('user1','2020/1/1 00:01:00',0,0,0);
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insert into sample values ('user1','2020/1/1 00:02:00',0,1,0);
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insert into sample values ('user1','2020/1/1 00:03:00',0,0,0);
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insert into sample values ('user1','2020/1/1 00:04:00',0,0,0);
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insert into sample values ('user1','2020/1/1 00:05:00',0,1,0);
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insert into sample values ('user1','2020/1/1 00:06:00',0,1,0);
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insert into sample values ('user2','2020/1/1 00:00:00',0,0,0);
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insert into sample values ('user2','2020/1/1 00:01:00',0,0,0);
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insert into sample values ('user2','2020/1/1 00:02:00',0,0,0);
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insert into sample values ('user2','2020/1/1 00:03:00',1,0,0);
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insert into sample values ('user2','2020/1/1 00:04:00',1,0,0);
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insert into sample values ('user2','2020/1/1 00:05:00',0,0,0);
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insert into sample values ('user2','2020/1/1 00:06:00',0,0,0);
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commit;
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```
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