• + 1 comment

    or may be

    SELECT CASE WHEN A+B >C AND A+C > B AND B+C > A THEN CASE WHEN A = B AND B = C THEN 'Equilateral' WHEN A = B OR B = C OR A = C THEN 'Isosceles' ELSE 'Scalene' END ELSE 'Not A Triangle' END FROM TRIANGLES