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Message Posted: Thu, 26 Jun 2003 @ 08:42:13 GMT

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Subj:   How to query a table having both Primary as well as Secondary Index
From:   Anomy Anom

<-- Anonymously Posted: Thursday, June 26, 2003 00:38 -->

We have a 1 TB table which has a Primary Index defined on two columns. But when it comes to accessing information from this table we also need to limit the rows by using a WHERE Condition on a 3rd row.

To facilitate the access we are planning to build a Secondary Index on the 3rd column.

However in reality we need a combination of all the three columns.

So should we build a Secondary Index on all the 3 columns including the Primary Index columns.

Or should we build a single Table join Index on this table with the Primary Index as the three columns (Can't afford the space).

Or should we build 3 different secondary indexes on 3 different colums.

Or can we use a combination of the 2 PIs and 1 SI in the queries. (which will be a Full Table Scan)


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