• + 1 comment

    in MySQL:

    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 B = C OR A = C) THEN 'Isosceles' ELSE 'Scalene' END AS TriangleType FROM TRIANGLES;