Calculate open hours

Question

I am using a SQL query

select 
    datediff(hour, Convert(DateTime, Convert(DateTime, Convert(nVarChar, cast(complaintdate as datetime), 101)) + \'\' +  
                


        

Answer 1

I agree with Jon Skeet's comment, but to answer your question, surely you only need to add a where clause: "where [Open Hours] > 500"?