題目：
一組聯絡歷史（總共500萬條）:
id 主叫號碼 被叫號碼 通話起始時間 通話結束時間 通話時長
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
求其中同乙個號碼的兩次通話之間間隔大於10秒的聯絡歷史id
例如：6，7，8，9，10條記錄均符合。
create table phone (
id number,
zph number,
bph number,
pbegin date,
pend date
insert into phone values(1,98290000,0215466546656,to_date('2007-02-01 09:49:53','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 09:50:16','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(2,98290000,021546654666,to_date('2007-02-01 09:50:29','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 09:50:41','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(3,98290000,021546654666,to_date('2007-02-01 09:50:58','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 09:51:12','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(4,68290900,0755133329866,to_date('2007-02-01 10:04:31','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 10:07:13','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(5,78290000,0755255708638,to_date('2007-02-01 10:48:26','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 10:49:23','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(6,78290000,0755821119109,to_date('2007-02-01 10:49:39','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 10:52:55','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(7,78290000,035730928370,to_date('2007-02-01 11:30:45','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 11:31:58','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(8,78290000,0871138889904,to_date('2007-02-01 11:33:47','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 11:35:00','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(9,68290000,035730928379,to_date('2007-02-01 11:52:20','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 11:54:56','yyyy-mm-dd hh24:mi:ss'));
insert into phone values(10,68290000,0298521811199,to_date('2007-02-01 12:44:45','yyyy-mm-dd hh24:mi:ss'),to_date('2007-02-01 12:45:04','yyyy-mm-dd hh24:mi:ss'));
commit;
sql> select * from phone;
id zph bph pbegin pend
1 98290000 2154665466 2007/2/1 9: 2007/2/1 9:
2 98290000 2154665466 2007/2/1 9: 2007/2/1 9:
3 98290000 2154665466 2007/2/1 9: 2007/2/1 9:
4 68290900 7551333298 2007/2/1 10 2007/2/1 10
5 78290000 7552557086 2007/2/1 10 2007/2/1 10
6 78290000 7558211191 2007/2/1 10 2007/2/1 10
7 78290000 3573092837 2007/2/1 11 2007/2/1 11
8 78290000 8711388899 2007/2/1 11 2007/2/1 11
9 68290000 3573092837 2007/2/1 11 2007/2/1 11
10 68290000 2985218111 2007/2/1 12 2007/2/1 12
10 rows selected
sql> select t1.id
2 from (select rownum rm, t.* from phone t) t1,
3 (select rownum rm, t.* from phone t) t2
4 where t1.zph = t2.zph
5 and t1.rm = t2.rm + 1
6 and (t1.pbegin - t2.pend)*24*60*60 > 10;
id6 rows selected
說明：oracle中date型別資料「+、-」操作返回值單位為「day」。
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