Table 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.xy-1-100-1-2The shortest distance is 1.00 from point (-1,-1) to (-1,2). So the output should be:shortest1.00Note: The longest distance among all the points are less than 10000.Optionsselect round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) as dist from point_2d as a, point_2d as b) as d;select round(dist) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist from point_2d as a, point_2d as b) as d;select round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist) as d;select round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist from point_2d as a, point_2d as b) as d;
Question
Table 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.xy-1-100-1-2The shortest distance is 1.00 from point (-1,-1) to (-1,2). So the output should be:shortest1.00Note: The longest distance among all the points are less than 10000.Optionsselect round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) as dist from point_2d as a, point_2d as b) as d;select round(dist) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist from point_2d as a, point_2d as b) as d;select round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist) as d;select round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist from point_2d as a, point_2d as b) as d;
Solution
The correct SQL query to find the shortest distance between points in a 2D plane, rounded to 2 decimal places, is:
select round(min(dist), 2) as shortest
from (
select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist
from point_2d as a, point_2d as b
) as d;
This query works by comparing every point with every other point in the table. For each pair of points, it calculates the Euclidean distance between them (using the formula sqrt((x2-x1)^2 + (y2-y1)^2)). If the points are the same (i.e., their x and y coordinates are both equal), it assigns a distance of 10000 to prevent the minimum distance from being 0. Finally, it selects the minimum of these distances and rounds it to 2 decimal places.
Similar Questions
Shortest Distance in a PlaneTable 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.xy-1-100-1-2The shortest distance is 1.00 from point (-1,-1) to (-1,2). So the output should be:shortest1.00Note: The longest distance among all the points are less than 10000.Optionsselect round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist from point_2d as a, point_2d as b) as d;select round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) as dist from point_2d as a, point_2d as b) as d;select round(dist) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist from point_2d as a, point_2d as b) as d;select round(min(dist), 2) as shortestfrom ( select if(a.x = b.x and a.y = b.y, 10000, sqrt(power(a.x - b.x, 2) + power(a.y - b.y, 2))) as dist) as d;
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