Table
Write a query to find the shortest distance between these points rounded to 2 decimals.
point_2d
holds the coordinates (x,y) of some unique points (more than two) in a plane.Write a query to find the shortest distance between these points rounded to 2 decimals.
| x | y | |----|----| | -1 | -1 | | 0 | 0 | | -1 | -2 |
The shortest distance is 1.00 from point (-1,-1) to (-1,2). So the output should be:
| shortest | |----------| | 1.00 |
Note: The longest distance among all the points are less than 10000.
SELECT
ROUND(SQRT(MIN((POW(p1.x - p2.x, 2) + POW(p1.y - p2.y, 2)))), 2) AS shortest
FROM
point_2d p1
JOIN
point_2d p2 ON p1.x != p2.x OR p1.y != p2.y
;
SELECT
ROUND(SQRT(MIN((POW(p1.x - p2.x, 2) + POW(p1.y - p2.y, 2)))),2) AS shortest
FROM
point_2d p1
JOIN
point_2d p2 ON (p1.x <= p2.x AND p1.y < p2.y)
OR (p1.x <= p2.x AND p1.y > p2.y)
OR (p1.x < p2.x AND p1.y = p2.y)
;