Archives of the TeradataForum

Message Posted: Wed, 04 May 2011 @ 11:32:36 GMT

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

<-- Anonymously Posted: Wednesday, May 04, 2011 03:30 -->

Hi All,

Can some one explain me the difference between collecting stats on partition column vs collecting stats on partitions.

Eg: Consider the below table. I can collect stats on join_date using syntax

     Collect stats on emp_summary column join_date;

Also I can collect stats on partitions involved in join_date.

What is the difference between these two approaches

     CREATE MULTISET TABLE emp. emp_summary ,NO FALLBACK ,
          NO BEFORE JOURNAL,
          NO AFTER JOURNAL,
          FREESPACE = 0 PERCENT,
          CHECKSUM = DEFAULT
          (
           emp_SUMM_ID INTEGER NOT NULL,
           join_DATE DATE FORMAT 'YYYY-MM-DD' NOT NULL,
          )

          PRIMARY INDEX (emp_SUMM_ID)
          PARTITION BY RANGE_N
              (join_DATE BETWEEN '2010-01-01' AND '2030-12-31' EACH INTERVAL '30' DAY );

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