Q&A for professional and enthusiast programmers
select sum(A.Score) from Posts as A join Posts as Q on A.ParentId = Q.Id join PostTags on PostTags.PostId = Q.Id join Tags on PostTags.TagId = Tags.Id where A.OwnerUserId = ##UserId## and A.PostTypeId = 2 and Q.PostTypeId = 1 and TagName = 'algorithm'