How to delete repeats in the list of sublists

Questions
1

Hi, I have started learning WM, and am faced with a problem: I need to delete sublists that contain repeats of numbers. For instance, sublists {1,2,3} must stay, and sublist {1,1,3} must be deleted. I know that for the bigger part of forum users this problem would be easy to solve, but I`m a newbie and hope for your help.

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2

Select[A, DuplicateFreeQ]

3

I think this gives you the same output you seek

Permutations[Table[x, {x, 1, 9}], {3}]