HackerRank Solution in MySql
HackerRank Solution :- Weather Observation Station 18
Consider p1 (a,b) and p2 (c,d) to be two points on a 2D plane.
- a happens to equal the minimum value in Northern Latitude (LAT_N in STATION).
- b happens to equal the minimum value in Western Longitude (LONG_W in STATION).
- c happens to equal the maximum value in Northern Latitude (LAT_N in STATION).
- d happens to equal the maximum value in Western Longitude (LONG_W in STATION).
Query the Distance between points p1 and p2 and round it to a scale of 4 decimal places.
Input Format
The STATION table is described as follows:
where LAT_N is the northern latitude and LONG_W is the western longitude.
Basic numeric functions to learn before solving this problem-
ROUND() — This function rounds a number to a specific number of decimal places.
Syntax–
ROUND(number, decimals)
ABS() -This function returns the absolute value of a number i.e positive number.
Syntax–
ABS(number)
The Distance between points p1 and p2 on 2d plane–
The distance between two points measured along axes at right angles. In a plane with p1 at (x1, y1) and p2 at (x2, y2), it is |x1 — x2| + |y1 — y2|
Solutions-
mysql-
select round(abs(min(LAT_N) - max(LAT_N)) + abs(min(LONG_W) - max(LONG_W)),4) from STATION;We have similar problem in hackerrank-
HackerRank Solution :- Weather Observation Station 19
Consider p1 (a,c) and p2 (b,d) to be two points on a 2D plane where (a,b) are the respective minimum and maximum values of Northern Latitude (LAT_N) and (c,d) are the respective minimum and maximum values of Western Longitude (LONG_W) in STATION.
Query the Euclidean Distance between points p1 and p2 and format your answer to display 4 decimal digits.
Input Format
The STATION table is described as follows:
where LAT_N is the northern latitude and LONG_W is the western longitude.
Basic numeric functions to learn before solving this problem-
SQRT() — This function returns the square root of a number.
Syntax–
SQRT(number)
POWER() — This function returns the value of a number raised to the power of another number..
Syntax–
POWER(a.b)
The Euclidean Distance between points p1 (a,c) and p2 (b,d) –
The distance between two points in the plane with coordinates (a,c) and (b,d) is
√ (b- a) ² + (d - c) ²Solutions-
mysql-
select round(SQRT(power((max(LAT_N))-(min(LAT_N)),2) + power((max(LONG_W))-(min(LONG_W)),2)),4) from STATION
