Re: Finding latest record for a number of groups in an INSERT-only table

On 5 Jul 2011, at 3:23, David Johnston wrote:

>> Does anyone have fresh thoughts or suggestions for dealing with
>> INSERT-mostly tables conceived in this manner?

You're struggling with read-performance in an INSERT-mostly table? Where are your performance priorities, on INSERT or on SELECT?

> Setup a materialized view.

Basically that means moving the tracking of the last row to the INSERT phase. If you go this way, a few approaches keep a "latest records" table are:
1. Replace the record with the same key with the latest one from your INSERT-mostly table, or
2. Update a foreign key reference to the latest record in your INSERT-mostly table.

The new table should probably have a UNIQUE constraint on the key field.

Alban Hertroys

--
If you can't see the forest for the trees,
cut the trees and you'll see there is no forest.

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