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with upvotes as (
SELECT  
Posts.OwnerUserId,
    TagName,
    COUNT(*) AS UpVotes 
FROM Tags
    INNER JOIN PostTags ON PostTags.TagId = Tags.id
    INNER JOIN Posts ON Posts.ParentId = PostTags.PostId
    INNER JOIN Votes ON Votes.PostId = Posts.Id and VoteTypeId = 2

GROUP BY TagName ,OwnerUserId
)

Select u.displayname , TagName  
from users u
INNER JOIN (
Select OwnerUserId, 
tagname, 
row_number() over ( partition by ownerUserId order by upvotes desc) tRank
from upvotes ) uv
On u.id = uv.ownerUserId
WHERE tRank < 11

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created dec 29 10 conradfrix