Archives of the TeradataForum

Message Posted: Tue, 20 Nov 2012 @ 13:25:03 GMT

	<Prev	Next>		<<First	<Prev	Next>	Last>>

Thanks Dieter.

If I go by the below given query, suppose we have million records in source table. In every each of records insert the subquery is getting MAX(subline_id) value from target table and having addition with ROW_NUMBER() value. And I guess it will happen million times. Is not a performance issue ?

     SELECT  ROW_NUMBER ()
        OVER (ORDER BY subline_id)
        + ( SELECT COALESCE(MAX(subline_id), 0)
            FROM ttmp.test_dipti_csum
          )
     FROM ttmp.test_dipti_csum  AS STAGE;

Thanks,

Dipti Prakash

	<Prev	Next>		<<First	<Prev	Next>	Last>>