10.1 定位连续值的范围

drop view v;
create table v (
proj_id int(2),
proj_start date,
proj_end date);

insert into v values(1,'2005-03-01','2005-03-02');
insert into v values(2,'2005-03-02','2005-03-03');
insert into v values(3,'2005-03-03','2005-03-04');
insert into v values(4,'2005-03-04','2005-03-05');
insert into v values(5,'2005-03-05','2005-03-07');
insert into v values(6,'2005-03-06','2005-03-17');
insert into v values(7,'2005-03-17','2005-03-18');
insert into v values(8,'2005-03-18','2005-03-19');
insert into v values(9,'2005-03-19','2005-03-20');
insert into v values(10,'2005-03-21','2005-03-22');
insert into v values(11,'2005-03-26','2005-03-27');
insert into v values(12,'2005-03-27','2005-03-28');
insert into v values(13,'2005-03-28','2005-03-29');
insert into v values(14,'2005-03-29','2005-03-30');

select v1.proj_id,v1.proj_start,v1.proj_end from v v1,v v2 where v1.proj_end=v2.proj_start;