一道sql面试题

来源：互联网发布：政务数据目录编辑：程序博客网时间：2024/04/30 08:43

一组通话记录（总共500万条）:
ID 主叫号码被叫号码通话起始时间通话结束时间通话时长
1 98290000 0215466546656 2007-02-01 09:49:53.000 2007-02-01 09:50:16.000 23
2 98290000 021546654666 2007-02-01 09:50:29.000 2007-02-01 09:50:41.000 12
3 98290000 021546654666 2007-02-01 09:50:58.000 2007-02-01 09:51:12.000 14
4 68290900 0755133329866 2007-02-01 10:04:31.000 2007-02-01 10:07:13.000 162
5 78290000 0755255708638 2007-02-01 10:48:26.000 2007-02-01 10:49:23.000 57
6 78290000 0755821119109 2007-02-01 10:49:39.000 2007-02-01 10:52:55.000 196
7 78290000 035730928370 2007-02-01 11:30:45.000 2007-02-01 11:31:58.000 73
8 78290000 0871138889904 2007-02-01 11:33:47.000 2007-02-01 11:35:00.000 73
9 68290000 035730928379 2007-02-01 11:52:20.000 2007-02-01 11:54:56.000 156
10 68290000 0298521811199 2007-02-01 12:44:45.000 2007-02-01 12:45:04.000 19

求其中同一个号码的两次通话之间间隔大于10秒的通话记录ID

if object_id('pubs..tb') is not null
drop table tb
go

create table tb(ID int,主叫号码 varchar(20),被叫号码 varchar(20),通话起始时间 datetime,通话结束时间 datetime,通话时长 int)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(1 ,'98290000', '0215466546656', '2007-02-01 09:49:53.000', '2007-02-01 09:50:16.000', 23)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(2 ,'98290000', '021546654666' , '2007-02-01 09:50:29.000', '2007-02-01 09:50:41.000', 12)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(3 ,'98290000', '021546654666' , '2007-02-01 09:50:58.000', '2007-02-01 09:51:12.000', 14)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(4 ,'68290900', '0755133329866', '2007-02-01 10:04:31.000', '2007-02-01 10:07:13.000', 162)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(5 ,'78290000', '0755255708638', '2007-02-01 10:48:26.000', '2007-02-01 10:49:23.000', 57)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(6 ,'78290000', '0755821119109', '2007-02-01 10:49:39.000', '2007-02-01 10:52:55.000', 196)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(7 ,'78290000', '035730928370' , '2007-02-01 11:30:45.000', '2007-02-01 11:31:58.000', 73)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(8 ,'78290000', '0871138889904', '2007-02-01 11:33:47.000', '2007-02-01 11:35:00.000', 73)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(9 ,'68290000', '035730928379' , '2007-02-01 11:52:20.000', '2007-02-01 11:54:56.000', 156)
insert into tb(ID,主叫号码,被叫号码,通话起始时间,通话结束时间,通话时长) values(10 ,'68290000', '0298521811199', '2007-02-01 12:44:45.000', '2007-02-01 12:45:04.000', 19)
go

select * from
(
select a.* from tb a,
(select * from tb ) b
where a.id = b.id - 1 and a.主叫号码 = b.主叫号码 and datediff(minute , a.通话结束时间 , b.通话起始时间) >= 10
union all
select b.* from tb b,
(select * from tb ) a
where a.id = b.id - 1 and a.主叫号码 = b.主叫号码 and datediff(minute , a.通话结束时间 , b.通话起始时间) >= 10
) t
order by id

drop table tb

/*
ID          主叫号码                 被叫号码                 通话起始时间                                                 通话结束时间                                                 通话时长
----------- -------------------- -------------------- ------------------------------------------------------ ------------------------------------------------------ -----------
6           78290000             0755821119109        2007-02-01 10:49:39.000                                2007-02-01 10:52:55.000                                196
7           78290000             035730928370         2007-02-01 11:30:45.000                                2007-02-01 11:31:58.000                                73
9           68290000             035730928379         2007-02-01 11:52:20.000                                2007-02-01 11:54:56.000                                156
10          68290000             0298521811199        2007-02-01 12:44:45.000                                2007-02-01 12:45:04.000                                19

（所影响的行数为 4 行）
*/