deletions | additions       diff --git a/section_Proposed_Solution_We_propose__.tex b/section_Proposed_Solution_We_propose__.tex  index afe5c2a..9888138 100644  --- a/section_Proposed_Solution_We_propose__.tex  +++ b/section_Proposed_Solution_We_propose__.tex 
...
Here is normal query which results in left-deep tree on oracle  \begin{verbatim}  SELECT STUDENT.ID as Student_ID, STUDENT.NAME as STUDENT_NAME, INSTRUCTOR.ID as Instructor_ID,COURSE.TITLE Instructor_ID,  COURSE.TITLE  FROM INSTRUCTOR ,TEACHES,COURSE, TAKES, STUDENT WHERE TEACHES.COURSE_ID=COURSE.COURSE_ID   AND TAKES.COURSE_ID = COURSE.COURSE_ID   AND STUDENT.ID = TAKES.ID 
...
Now we force to build bushy tree by breaking down the queries to two sub queries. While sub queries result in multiple left deep-tree  \begin{verbatim}  WITH  t1 as (SELECT /*+ no_merge */ INSTRUCTOR.ID as Instructor_ID, COURSE.COURSE_ID, COURSE.COURSE_ID as T1_ID FROM INSTRUCTOR,TEACHES,COURSE WHERE TEACHES.COURSE_ID=COURSE.COURSE_ID), t2 as (SELECT /*+ no_merge */ STUDENT.ID as Student_ID, STUDENT.name as Student_Name, COURSE.COURSE_ID, COURSE.COURSE_ID as T2_ID, COURSE.TITLE as TITLE FROM COURSE, TAKES, STUDENT WHERE TAKES.COURSE_ID = COURSE.COURSE_ID AND STUDENT.ID = TAKES.ID) SELECT t2.Student_ID, t2.Student_Name, t1.Instructor_ID, t2.TITLE FROM t1, t2   WHERE t1.T1_ID = t2.T2_ID;  \end{verbatim}