text: /*
  
  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.
  
  */
  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;
  
  
  /*
  SELECT CASE WHEN A=B AND B=C AND A=C THEN 'Equilateral'
  WHEN A+B <= C OR A+C <= B OR B+C <= A THEN 'Not A Triangle'
  WHEN A=B OR B=C OR A=C THEN 'Isosceles'
  ELSE 'Scalene' END FROM TRIANGLES;
  */
  