Each duplicate question has up to three other questions as the non-duplicate posts. This query finds the posts that duplicate questions point to. It mostly works, but no guarantees.
Q&A for community managers, administrators, and moderators
create table #DupeStrings (Dupe INT, Targets VARCHAR(255))
insert into #DupeStrings
select top 200 PostId as [Post Link],
-- Grab text from after the first '[' to the first ']'
charindex('[', Text) + 1,
charindex(']', Text) - charindex('[', Text) - 1) + ',,'
from PostHistory h
where PostHistoryTypeId = 10
and Comment in (1, 101)
order by h.CreationDate desc
left(Targets, charindex(',', Targets) - 1) as Tgt1,
charindex(',', Targets) + 1,
charindex(',', Targets) - charindex(',', Targets) - 1)
) as Tgt2
--select Dupe as [Post Link], FirstTarget as [Post Link], TgtPost1.Tags
--left join Posts DupePost on DupePost.Id = Dupe
--left join Posts TgtPost1 on TgtPost1.Id = FirstTarget
--where DupePost.Tags not like '%<story-identification>%'
--and TgtPost1.Tags like '%<story-identification>%'