Mysql按顺序连接（来自点的段）

Question

我正在尝试用点数据库构建片段

points
id | xcoord

1  |   2
2  |   5
3  |   9
4  |   12

我的想法是加入一个被一个偏移的xcoords，这会给我..

first_x   next_x
2       | 5
5       | 9
9       | 12

但我无法弄明白

select first_x, next_x from (
(select xcoords as first_x from points order by xcoords)
join( select xcoords as next_x from points limit 100 offset 1 )
on ???