SESSION NAME: Advance Select - 2

QUESTION NAME:  Triangles


TABLE DESCRIPTION:
Write a query identifying the type of each record in the TRIANGLES table using its three side lengths. Output one of the following statements for each record in the table:

Equilateral: It's a triangle with 3 sides of equal length.
Isosceles: It's a triangle with 2 sides of equal length.
Scalene: It's a triangle with 3 sides of differing lengths.
Not A Triangle: The given values of A, B, and C don't form a triangle.

CODE:
select
CASE
 WHEN A + B <= C OR A + C <= B OR B + C <= A THEN 'Not A Triangle'
  WHEN A = B AND B = C THEN 'Equilateral'
  WHEN A = B OR A = C OR B = C THEN 'Isosceles'
  WHEN A <> B AND B <> C THEN 'Scalene'
  END TRIANGLES
  from TRIANGLES;