Untitled

SELECT
CASE
WHEN a+b<=c OR b+c<=a or c+a<=b THEN "Not A Triangle"
WHEN a=b AND b=c THEN "Equilateral"
WHEN a=b or b=c or a=c THEN "Isosceles"
WHEN a!=b AND b!= c THEN "Scalene"
END
FROM triangles