您好我有以下表结构。
RESE_ID DATE_OF_SERVICE TIME_OF_SERVICE NO_OF_ATT_MALE NO_OF_ATT_FEMALE
1 2012-09-18 16:17:52 5 1
2 2012-09-18 16:19:22 1 2
3 2012-09-18 16:29:12 2 1
4 2012-09-18 16:37:22 1 4
5 2012-09-18 16:49:02 6 5
6 2012-09-18 17:01:52 3 2
7 2012-09-18 17:19:52 0 1
我只想在最后1小时内每隔10分钟获得（no_of_att_male）的总和，例如（16:00 - 17:00）
像输出shd一样 RESE_ID DATE_OF_SERVICE NO_OF_ATT_MALE NO_OF_ATT_FEMALE TIME_SLOT
1 2012-09-18 0 0 16:00 - 16:10
2 2012-09-18 6 3 16:11 - 16:20
3 2012-09-18 2 1 16:21 - 16:30
4 2012-09-18 1 4 16:31 - 16:40
5 2012-09-18 6 5 16:41 - 16:50
6 2012-09-18 0 0 16:51 - 17:00
请建议我在sqlite中接受的查询（我在HTML5中使用它）
答案 0 :(得分：1)
SELECT DATE_OF_SERVICE,
SUM(NO_OF_ATT_MALE),
SUM(NO_OF_ATT_FEMALE),
SUBSTR(TIME_OF_SERVICE, 1, 4) || '0 - ' ||
SUBSTR(TIME_OF_SERVICE, 1, 4) || '9' AS TIME_SLOT
FROM mytable
GROUP BY 4
这将产生这样的输出，即没有空时隙的记录：
DATE_OF_SERVICE SUM(NO_OF_ATT_MALE) SUM(NO_OF_ATT_FEMALE) TIME_SLOT
--------------- ------------------- --------------------- -------------
2012-09-18 6 3 16:10 - 16:19
2012-09-18 2 1 16:20 - 16:29
2012-09-18 1 4 16:30 - 16:39
2012-09-18 6 5 16:40 - 16:49
2012-09-18 3 2 17:00 - 17:09
2012-09-18 0 1 17:10 - 17:19