##### Welcome to Subscribe On Youtube

Formatted question description: https://leetcode.ca/all/610.html

# 610. Triangle Judgement (Easy)

A pupil Tim gets homework to identify whether three line segments could possibly form a triangle.<p></p> However, this assignment is very heavy because there are hundreds of records to calculate.<p></p>

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.<p></p>

| 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 1.

```
# OJ: https://leetcode.com/problems/triangle-judgement/
SELECT
x, y, z,
CASE
WHEN x + y > z AND x + z > y AND y + z > x THEN 'Yes'
ELSE 'No'
END AS 'triangle'
FROM
triangle
```