Leetcode: Shortest Distance in a Line

Shortest Distance in a Line



Similar Problems:


Table point holds the x coordinate of some points on x-axis in a plane, which are all integers.
Write a query to find the shortest distance between two points in these points.

| x   |
|-----|
| -1  |
| 0   |
| 2   |

The shortest distance is ‘1’ obviously, which is from point ‘-1’ to ‘0’. So the output is as below:

| shortest|
|---------|
| 1       |

Note: Every point is unique, which means there is no duplicates in table point.

Follow-up: What if all these points have an id and are arranged from the left most to the right most of x axis?

Github: code.dennyzhang.com

Credits To: leetcode.com

Leave me comments, if you have better ways to solve.


## Blog link: https://code.dennyzhang.com/shortest-distance-in-a-line
select t1.x-t2.x as shortest
from point as t1 join point as t2
where t1.x>t2.x
order by (t1.x-t2.x) asc
limit 1
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