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Confirms questions have PostTypeId 1 and ParentId is NULL and answers have PostTypeId 2 and ParentId is not null.

Q&A about the site for students, teachers, and linguists wanting to discuss the finer points of the Italian language

-- Unique PostTypeIds
select distinct PostTypeId, case when ParentId is null then 'ParentId NULL' else 'ParentId not null' end as [ParentId state] from Posts

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created may 27 10 Mark Hurd