Exadata Technical Overview - Oracle
Exadata Technical Overview - Oracle
Exadata Technical Overview - Oracle
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33<br />
Storage Index with Partitions Example<br />
Orders Table<br />
Order# Order_Date<br />
� Queries on Ship_Date do not benefit from Order_Date partitioning<br />
– However Ship_date and Order# are highly correlated with Order_Date<br />
– e.g. Ship dates are usually near Order_Dates and are never less<br />
� Storage index provides partition pruning like performance for queries on Ship_Date and<br />
Order#<br />
– Takes advantage of ordering created by partitioning or sorted loading<br />
Copyright © 2012, <strong>Oracle</strong> and/or its affiliates. All rights reserved.<br />
Partitioning Column<br />
1 2007 2007<br />
2 2008 2008<br />
3 2009 2009<br />
Ship_Date Item
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