Type of Triangle in MYSQL

Question

Problem statement:

Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Output one of the followin

Answer 1

SELECT
  CASE 
    WHEN A + B <= C or A + C <= B or B + C <= A THEN 'Not A Triangle'
    WHEN A = B and B = C THEN 'Equilateral'
    WHEN A = B or A = C or B = C THEN 'Isosceles'
    WHEN A <> B and B <> C THEN 'Scalene'
  END tuple
FROM TRIANGLES;

1. By using case statement check if given input is a triangle or not.
2. If it is a triangle then check if all sides are same if true the triangle type is 'Equilateral'.
3. If not then check if any two sides are equal if true the triangle type is 'Isosceles'
4. In the case of not equal, any sides the triangle type is 'Scalene'. We can directly use ELSE also.