One to one/ one to many

One to one/ one to many

References

Reference NO 1

http://en.wikipedia.org/wiki/One-to-many

Reference NO 2

http://stackoverflow.com/questions/4601703/difference-between-one-to-many-and-many-to-one-relationship

Reference NO 3

https://docs.djangoproject.com/en/1.4/topics/db/examples/many_to_one/

Reference NO 4

http://web.media.mit.edu/~kkarahal/generals/communication/one_group.html

Reference NO 5

http://forums.sugarcrm.com/f22/one-one-one-many-many-many-explained-35623/

Reference NO 6

http://mathworld.wolfram.com/Many-to-One.html

Reference NO 7

#EANF#

Reference NO 8

http://docs.sqlalchemy.org/en/rel_0_8/orm/relationships.html