Symmetric Pairs

Symmetric Pairs

Author: amitverma80

Medium/Symmetric Pairs.sql

@@ -0,0 +1,7 @@
+SELECT distinct f1.x, f1.Y
+FROM functions f1 
+INNER JOIN functions f2 ON (f1.x = f2.y and f2.x = f1.y)
+where f1.x<=f1.y
+Group by f1.x, f1.y
+Having COUNT(f1.X)>1 or f1.X<f1.Y
+ORDER BY f1.X