Hackers Rank : SQL Oracle : Type of Triangle solution

# Q

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

• Equilateral: It's a triangle with  sides of equal length.
• Isosceles: It's a triangle with  sides of equal length.
• Scalene: It's a triangle with  sides of differing lengths.
• Not A Triangle: The given values of A, B, and C don't form a triangle

# A

SELECT
CASE WHEN A = B AND B = C THEN 'Equilateral'
    WHEN A+B <= C OR A+C <= B OR B+C <= A THEN 'Not A Triangle'
    WHEN A = B OR B = C OR A = C THEN 'Isosceles'
    ELSE 'Scalene' END
FROM TRIANGLES;