added triangle inequality

Author: letsdeepchat

ADVANCED SELECT AND JOINS/610. Triangle Judgement.sql

@@ -0,0 +1,10 @@
+# Write your MySQL query statement below
+-- Using the triangle inequality:
+
+-- x + y > z
+-- x + z > y
+-- y + z > x
+
+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;