We have several labels on issues in my project.
E.g. A, B, C, D, ...
I want to find the issues that have label A and only label A.
That is, I dont want to find any issues having A + another label. Just the ones with A only.
And I dont want to list all other possible labels and exclude them, as in the following query. ( labels=A and labels not in (B,C,D...) )
This is not a good solution when there are a huge amount of other labels.