Type of Triangle in MYSQL

Question

Problem statement:

Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Output one of the followin

Answer 1

select 
case
    when (a+b>c) and (b+c>a) and (c+a>b) then
        case
            when a=b and b=c then 'Equilateral'
            when a=b or b=c or c=a then 'Isosceles'
            else 'Scalene'
        end
    else 'Not A Triangle'
end 
from triangles;