Your h-index is the highest number n, such that you have at least n questions/answers, all of which have at least n score.
Q&A for scientific skepticism
with distinctscores as ( select distinct score from posts where owneruserid=88656 ), scorecomp as ( select ds.score, postcount=(select count(*) from posts where owneruserid=88656 and score>=ds.score) from distinctscores ds ) select * from scorecomp where postcount>=score order by score