# Write your MySQL query statement below
SELECT ROUND(MIN(SQRT(POW(p1.x-p2.x,2)+POW(p1.y-p2.y,2))),2) AS shortest
FROM point_2d p1
LEFT JOIN point_2d p2
ON !(P1.x=P2.x AND p1.y=p2.y)
;
612. Shortest Distance in a Plane
原文：https://www.cnblogs.com/yuesi/p/10134934.html