SQL and PL/SQL by Example
Ignatius Fernandez · Apress eBooks · 2015
All database activity is conducted in SQL, and therefore database administrators need to be intimately familiar with it. Figure 2-1 illustrates that the greatest potential for performance improvement usually lies within the software application, not within the database where the application stores its data or within the physical infrastructure where the database is housed. 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.