deletions | additions       diff --git a/section_Proposed_Solution_We_propose__.tex b/section_Proposed_Solution_We_propose__.tex  index c5933c3..cfdabb4 100644  --- a/section_Proposed_Solution_We_propose__.tex  +++ b/section_Proposed_Solution_We_propose__.tex 
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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  \end{verbatim}  Now we force to build bushy tree by breaking down the queries to two sub queries. While sub queries result in multiple  left deep-trees deep-tree  \begin{verbatim}  WITH  t1 as (SELECT /*+ no_merge */ INSTRUCTOR.ID as Instructor_ID, COURSE.COURSE_ID, COURSE.COURSE_ID as T1_ID