해커랭크 - Type of Triangle (CASE)

https://www.hackerrank.com/challenges/what-type-of-triangle/problem

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 A=C OR B=C THEN 'Isosceles'
           
           ELSE 'Scalene'
           
      END
      
FROM TRIANGLES