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Oracle Data Warehouse Tuning for 10g
book

Oracle Data Warehouse Tuning for 10g

by Gavin JT Powell
April 2011
Intermediate to advanced content levelIntermediate to advanced
504 pages
16h 49m
English
Digital Press
Content preview from Oracle Data Warehouse Tuning for 10g
240 8.3 GROUP BY Clause Extensions and Materialized Views
CREATE MATERIALIZED VIEW mv_rollup_cost
PARALLEL NOLOGGING TABLESPACE mvdata
COMPRESS USING NO INDEX NEVER REFRESH
ENABLE QUERY REWRITE
AS SELECT l.city, i.industry, p.category
,COUNT(pu.transaction_amount),COUNT(*)
,SUM(pu.transaction_amount)
FROM purchase pu, location l, time t, product p, industry i
WHERE pu.location_id = l.location_id
AND pu.time_id = t.time_id
AND pu.product_id = p.product_id
AND pu.industry_id = i.industry_id
GROUP BY ROLLUP(l.city, i.industry, p.category);
ANALYZE TABLE mv_rollup_cost COMPUTE STATISTICS;
Unless the query executed against the join creating the
MV_ROLLUP_COST ...
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Publisher Resources

ISBN: 9781555583354