classifying-triangles-by-lengths.sql

# Time:  O(n)
# Space: O(n)

SELECT CASE
            WHEN A + B <= C OR A + C <= B OR B + C <= A THEN "Not A Triangle"
            WHEN A = B AND A = C THEN "Equilateral"
            WHEN A = B OR A = C OR B = C THEN "Isosceles"
            ELSE "Scalene"
       END AS triangle_type
FROM Triangles;