SELECT ListSort(ListUniq([1, 2, 1, 3, 4, 2, 4])),
    ListSort(ListUniq([1, 2, 3, null, 1, 7, 4, 3])),
    ListUniqStable([]),
    ListUniqStable([1, 2, 1, 3, 4, 2, 4]),
    ListUniqStable([1, 2, 3, null, 1, 7, 4, 3]),
    ListUniqStable(["a", "b", "c", "a", "ab", "ac", "ab"]),
    ListUniqStable(Just(["a", "b", "c", "a", "ab", "ac", "ab"])),
    ListUniqStable(NULL);
