HackerRank - SQL - Type of Triangle

Problem

Type of Triangle

MySQL

select 
case
    when A+B<=C or A+C<=B or B+C<=A then "Not A Triangle"
    when A=B and A=C and B=C then "Equilateral"
    when A=B or A=C or B=C then "Isosceles"
    else "Scalene"
END
FROM TRIANGLES;