Triangle Judgement 8-10-22

link -----  https://www.codingninjas.com/codestudio/problems/triangle-judgement_2111954?topList=top-100-sql-problems


Problem Statement

 A pupil Tim gets homework to identify whether three line segments could possibly form a triangle.

 However, this assignment is very heavy because there are hundreds of records to calculate.

Could you help Tim by writing a query to judge whether these three  sides can form a triangle, assuming table triangle holds the length of the three sides x, y and z.

| x  | y  | z  |
|----|----|----|
| 13 | 15 | 30 |
| 10 | 20 | 15 |

 For the sample data above, your query should return the follow result:
 | x  | y  | z  | triangle |
 |----|----|----|----------|
 | 13 | 15 | 30 | No       |
 | 10 | 20 | 15 | Yes      |



--------------------- solution ------------------------


select *,
      case
          when X+Y>Z and X+Z>Y and Z+Y>X then 'Yes'
          else 'No'
      end as triangle
from TRIANGLE