Nth Largest element from a table sql Query
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        Published on 2010-05-30T06:28:08Z
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            2010/05/30
            6:32 UTC
        
        
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sql-server
can any one explain hiow this query works..It's for getting the Nth largest elemet from a table.here it's 4 th largest
SELECT a.ID
  FROM tblitem a
 WHERE (4) = (select count(*)
                from tblItem  b
               where b.id < a.id)
Thanks in advance
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