... execute a join of three or more tables, Oracle takes these steps:1. Oracle joins two of the tables based on the join conditions, comparing their columns.2. Oracle joins the result to another table, ... certification exam.Set operators in Oracle let you combine results from two or more SELECT statements. The results of each SELECT statement are considered a set, and Oracle provides UNION, INTERSECT, ... relationship using a JOIN clause instead of the WHERE clause. The JOIN clause introduced by Oracle in Oracle 9i was then added to conform to the ISO/ANSI 95127c04.indd 198 2/18/09 9:43:34 AMPlease...