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Q&A about the site for builders and users of networked sensors and control devices in the contexts of smart homes, industry automation, or environmental sensors

SELECT q.Id, q.Title,  q.CreationDate, q.Tags, q.Body, 
                min(a.CreationDate) as first_ans_dt  
             FROM posts q 
                 LEFT JOIN posts a 
                 ON q.Id=a.ParentId AND q.CreationDate>='2019-02-01' and q.CreationDate<'2019-02-08'  
             AND  a.CreationDate>='2019-02-01' and a.CreationDate<'2019-02-08'   
             WHERE  q.CreationDate>='2019-02-01' and q.CreationDate<'2019-02-08'  
             AND  a.CreationDate>='2019-02-01' and a.CreationDate<'2019-02-08' 
             GROUP BY q.Id, q.Title,  q.CreationDate, q.Tags, q.Body

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created aug 11 anonymous