我要求显示1到20个问题，有多少队在0-23小时内回答。表结构
Team_id Question_id Updated
124 25092 02-SEP-14 11:30:12 AM
15 25076 02-SEP-14 02:31:15 PM
258 25061 02-SEP-14 03:02:33 PM
298 25196 02-SEP-14 03:32:49 PM
450 25203 02-SEP-14 07:01:05 PM
471 25351 02-SEP-14 07:47:31 PM
482 25350 02-SEP-14 08:01:03 PM
78 24924 02-SEP-14 08:01:29 PM
541 26032 02-SEP-14 09:35:00 PM
708 26485 02-SEP-14 12:19:48 PM
726 26125 02-SEP-14 01:00:11 PM
145 26221 02-SEP-14 03:45:32 PM
824 26436 02-SEP-14 06:30:16 PM
87 26505 02-SEP-14 06:30:22 PM
825 26488 02-SEP-14 06:31:34 PM
466 26488 02-SEP-14 06:34:48 PM
868 26091 02-SEP-14 08:30:59 PM
1356 28852 02-SEP-14 07:45:14 PM
1342 28852 02-SEP-14 07:45:27 PM
查询应返回
Hours 1 2 3 4 5 to 20
10 6 0 2 3 6 to 25
11 3 2 1 1 7 to 300
12 2 0 5 0 7 to 30
13 1 6 1 1 7 to 40
请注意，这不是第1或第2个问题。
由于 阿伦
答案 0 :(得分：0)
我想你需要这样的东西：
select hour,
count(decode(cnt, 1, 1)) as q1,
count(decode(cnt, 2, 1)) as q2,
count(decode(cnt, 3, 1)) as q3,
count(decode(cnt, 4, 1)) as q4,
...
count(decode(cnt, 20, 1)) as q20
from (
select to_char(updated, 'HH24') as hour
, count(*) as cnt
from &table_name
group by to_char(updated, 'HH24'), team_id
)
group by hour;
答案 1 :(得分：0)
据我了解，也许你想要这样的东西：
SQL> WITH DATA AS(
2 SELECT 124 team_id, 25092 question_id, to_date('02-SEP-14 11:30:12 AM','DD-MON-RR HH:MI:SS AM') UPDATED FROM DUAL UNION ALL
3 SELECT 15 , 25076 ,to_date('02-SEP-14 02:31:15 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
4 SELECT 258 , 25061 ,to_date('02-SEP-14 03:02:33 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
5 SELECT 298 , 25196 ,to_date('02-SEP-14 03:32:49 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
6 SELECT 450 , 25203 ,to_date('02-SEP-14 07:01:05 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
7 SELECT 471 , 25351 ,to_date('02-SEP-14 07:47:31 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
8 SELECT 482 , 25350 ,to_date('02-SEP-14 08:01:03 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
9 SELECT 78 , 24924 ,to_date('02-SEP-14 08:01:29 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
10 SELECT 541 , 26032 ,to_date('02-SEP-14 09:35:00 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
11 SELECT 708 , 26485 ,to_date('02-SEP-14 12:19:48 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
12 SELECT 726 , 26125 ,to_date('02-SEP-14 01:00:11 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
13 SELECT 145 , 26221 ,to_date('02-SEP-14 03:45:32 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
14 SELECT 824 , 26436 ,to_date('02-SEP-14 06:30:16 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
15 SELECT 87 , 26505 ,to_date('02-SEP-14 06:30:22 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
16 SELECT 825 , 26488 ,to_date('02-SEP-14 06:31:34 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
17 SELECT 466 , 26488 ,to_date('02-SEP-14 06:34:48 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
18 SELECT 868 , 26091 ,to_date('02-SEP-14 08:30:59 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
19 SELECT 1356 , 28852 ,to_date('02-SEP-14 07:45:14 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL UNION ALL
20 SELECT 1342 , 28852 ,to_date('02-SEP-14 07:45:27 PM','DD-MON-RR HH:MI:SS AM') FROM DUAL)
21 SELECT 5 hours,
22 COUNT(team_id)
23 FROM DATA
24 WHERE UPDATED BETWEEN to_date('02-SEP-14 10:00:01','DD-MON-RR HH24:MI:SS') AND to_date('02-SEP-14 14:59:59','DD-MON-RR HH24:MI:SS')
25 UNION
26 SELECT 6 hours,
27 COUNT(team_id)
28 FROM DATA
29 WHERE UPDATED BETWEEN to_date('02-SEP-14 10:00:01','DD-MON-RR HH24:MI:SS') AND to_date('02-SEP-14 15:59:59','DD-MON-RR HH24:MI:SS')
30 UNION
31 SELECT 10 hours,
32 COUNT(team_id)
33 FROM DATA
34 WHERE UPDATED BETWEEN to_date('02-SEP-14 10:00:01','DD-MON-RR HH24:MI:SS') AND to_date('02-SEP-14 19:59:59','DD-MON-RR HH24:MI:SS')
35 UNION
36 SELECT 24 hours,
37 COUNT(team_id)
38 FROM DATA
39 WHERE UPDATED BETWEEN to_date('02-SEP-14 00:00:01','DD-MON-RR HH24:MI:SS') AND to_date('02-SEP-14 23:59:59','DD-MON-RR HH24:MI:SS')
40 /
HOURS COUNT(TEAM_ID)
---------- --------------
5 4
6 7
10 15
24 19
以时间间隔为例，我采用了不同的时间间隔，HOURS列是WHERE子句中提到的时间间隔。