Hi,

 

I would like to figure out a relation on PurchParmTable 
(http://msdn.microsoft.com/en-us/library/aa864816.aspx)  :

 






PurchParmTable 


PurchParmTable Table 


 PurchParmTable.ParmId == PurchParmTable.ParmId 

 PurchParmTable.TableRefId == PurchParmTable.TableRefId 

 

there is a self joining on ParmId and TableRefId...

What is exact reason to make this relation ?


regards,


Muhammet ATALAY
Comp.Eng.



                                          

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