Chapter 9. Tuning Table Access
In this chapter, we look at ways to improve the performance of SQL statements that access a single table. The single table query is the building block of more complex SQL queries, so understanding how to optimize the single table access is a prerequisite for improving the performance of more elaborate queries.
There are usually a number of possible access methods for any given table access. A full table scan is always an option and, depending on physical data model, there may be a number of index, partition, or cluster-based retrieval options.
The optimizer will not always choose the best access path, and you need to be able to evaluate the optimizer’s choice and sometimes encourage the use of a different access ...
Get Oracle now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
