TableRelations in ax 2012

Have a nice day!!!!

Dear All

Can anyone kindly give me the good practical or real time example on TableRelations 'Normal', 'FieldFixed', 'RelatedFieldFixed' and 'ForeignKey(Primarykey Based & SingleKey AlternateKey Based)' in ax 2012. Kindly give me the clear example for batter understanding. I have gone through documentation but i couldn't able to get real-life example.

Please help me.

Thanks in Advance!!!!