SQL Optimization Techniques
Christian Antognini · Apress eBooks · 2014
Whenever the query optimizer is unable to automatically generate an efficient execution plan, some manual optimization is required. For that purpose, Oracle Database provides several techniques, summarized in Table 11-1. The goal of this chapter isn’t only to describe these techniques in detail but to explain what each technique can do for you and in which situations you can take advantage of them. To choose one of them, it’s essential to ask yourself three basic questions: These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.