Abstract
This chapter focuses on aspects of Oracle Structured Query Language (SQL) code provided specifically for tuning of data-warehouse type functionality. To introduce aspects of tuning SQL code for data warehouses, it is necessary to go back to basics. This chapter provides details of the most simplistic aspects of SQL code tuning, a description of how the Oracle SQL engine executes SQL code internally, and the tools for tuning Oracle Database. It is essential to understand the basic facts about how to write properly performing SQL code and perform basic tuning using Oracle internals and simple tools.
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