Delete the parent of a child

Delete the parent of a child

References

Reference NO 1

http://stackoverflow.com/questions/5196261/deleting-rows-from-parent-and-child-tables

Reference NO 2

http://stackoverflow.com/questions/9640340/delete-a-child-and-a-parent-row-with-one-sql-script

Reference NO 3

http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:6254523200346736598

Reference NO 4

http://docs.jboss.org/hibernate/orm/3.3/reference/en-US/html/example-parentchild.html

Reference NO 5

http://www.coderanch.com/t/535478/ORM/databases/Exception-Deleting-Parent-Child-entity

Reference NO 6

http://social.msdn.microsoft.com/Forums/windows/en-US/2ba91112-6b19-490c-9411-e222a837f619/action?threadDisplayName=place-child-data-in-a-history-table-on-delete-of-parent-record

Reference NO 7

http://wiki.blender.org/index.php/Doc:2.6/Manual/Modeling/Objects/Groups_and_Parenting

Reference NO 8

https://forum.hibernate.org/viewtopic.php?p=2395370