How can I get unique values in array in a jmespath query?

Question

In an aws cli jmespath query, with for example the output ["a","a","b","a","b"], how do i extract the unique values of it to get ["a","b"]?

Answer 1

It's not what you asked for but I've used the following:

aws ... | jq -r ".[]" | sort | uniq

This will convert ["a", "a", "b", "a"] to:

a
b