Leetcode 603. Consecutive Available Seats

Several friends at a cinema ticket office would like to reserve consecutive available seats.
Can you help to query all the consecutive available seats order by the seat_id using the following cinematable?

| seat_id | free |
|---------|------|
| 1       | 1    |
| 2       | 0    |
| 3       | 1    |
| 4       | 1    |
| 5       | 1    |

 

Your query should return the following result for the sample case above.

 

| seat_id |
|---------|
| 3       |
| 4       |
| 5       |

Note:

• The seat_id is an auto increment int, and free is bool ('1' means free, and '0' means occupied.).
• Consecutive available seats are more than 2(inclusive) seats consecutively available.

 

create table cinema (seat_id int,free int)

insert into cinema values(1,1)
insert into cinema values(2,0)
insert into cinema values(3,1)
insert into cinema values(4,1)
insert into cinema values(5,1)


| seat_id | free |
|---------|------|
| 1       | 1    |
| 2       | 0    |
| 3       | 1    |
| 4       | 1    |
| 5       | 1    |

select distinct c1.seat_id from cinema c1,
cinema c2 
where (c1.seat_id+1=c2.seat_id or c1.seat_id-1=c2.seat_id)
and (c1.free=1 and c2.free=1)

select distinct c1.seat_id from cinema c1,
cinema c2 
where abs(c1.seat_id-c2.seat_id)=1
and (c1.free=1 and c2.free=1)