Type of Triangle

• 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  sides of equal length.
  • Isosceles: It's a triangle with  sides of equal length.
  • Scalene: It's a triangle with  sides of differing lengths.
  • Not A Triangle: The given values of A, B, and C don't form a triangle.
• Input Format
• The TRIANGLES table is described as follows:

Each row in the table denotes the lengths of each of a triangle's three sides.

 

 

 

 

 

 

# 나의 해답

SELECT CASE WHEN A + B > C AND B + C > A AND A + C > B 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;