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

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

declare contro cursor scroll for select A,B,C from TRIANGLES 
open contro;
declare @canh1 int, @canh2 int, @canh3 int;
fetch next from contro into @canh1,@canh2,@canh3
while @@fetch_status = 0
begin 
if (@canh1 + @canh2 > @canh3) and(@canh1 + @canh3 > @canh2) and(@canh3 + @canh2 > @canh1) begin
    if @canh1 = @canh2 and @canh2 = @canh3 and @canh1 = @canh3
        print 'Equilateral'; 
    else if (@canh1 = @canh2 and @canh1 != @canh3) or (@canh2 = @canh3 and @canh2 != @canh1) or (@canh1 = @canh3 and @canh1 != @canh2)
        print 'Isosceles';
    else
        print 'Scalene';
    end
else
    print 'Not A Triangle';
    fetch next from contro into @canh1,@canh2,@canh3
end