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My Solution:
SELECT
case
when A+B<=C OR B+C<=A OR C+A<=B THEN 'Not A Triangle'
WHEN (A=B AND B<>C) OR (B=C AND C<>A) OR (A=C AND C<>B) THEN 'Isosceles'
WHEN A=B AND B=C THEN 'Equilateral'
ELSE
'Scalene'
END
FROM TRIANGLES;
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Type of Triangle
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My Solution: SELECT case when A+B<=C OR B+C<=A OR C+A<=B THEN 'Not A Triangle' WHEN (A=B AND B<>C) OR (B=C AND C<>A) OR (A=C AND C<>B) THEN 'Isosceles' WHEN A=B AND B=C THEN 'Equilateral' ELSE 'Scalene' END FROM TRIANGLES;