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SELECT
CASE
WHEN A + B <= C OR B + C <= A OR A + C <= B THEN 'Not A Triangle'
WHEN A = B AND B = C THEN 'Equilateral'
WHEN A = B OR B = C OR A = C THEN 'Isosceles'
ELSE 'Scalene'
END AS TriangleType
FROM
TRIANGLES;
The first criteria to rule out is the 'Not A Triangle', that the sum of any two sides is not greater than the third.
This code will definitely work
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Type of Triangle
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This is the solution in Mysql:
SELECT CASE WHEN A + B <= C OR B + C <= A OR A + C <= B THEN 'Not A Triangle' WHEN A = B AND B = C THEN 'Equilateral' WHEN A = B OR B = C OR A = C THEN 'Isosceles' ELSE 'Scalene' END AS TriangleType FROM TRIANGLES;
The first criteria to rule out is the 'Not A Triangle', that the sum of any two sides is not greater than the third. This code will definitely work