Type of Triangle.sql

SELECT 
    CASE 
        WHEN A + B > C AND A + C > B AND B + C > A THEN   -- 2 zijden moet >= langste zijde zijn
         CASE 
            WHEN A = B AND B = C THEN 'Equilateral'       -- 3 zijden gelijk
            WHEN A = B OR B = C OR A = C THEN 'Isosceles' -- 2 zijden gelijk
            ELSE 'Scalene'                                -- geen gelijke zijden
         END
        ELSE 'Not A Triangle'
    END
FROM TRIANGLES

/*
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.
*/