Monday, April 18, 2011

ADF BC : Refreshing some Cardinality in ADF BC



1 Means each Detail row must corresponds to one master row

* Means each master row can correspond to any number of detail row


“0..1” means each detail row can correspond to 0 or 1 master row.


This is pure one to one cardinality

Most used relationships for better normalized schema are one to one , one to many , many to one and many to many.

Remember that many to many relationship has 3 table , one source , one destination and one intersection table that map between two.

HR Schema has Employee , Job , JobHistory

TableEmployee – EmployeeId

JobHistory – EmployeeId , JobId

TableJob – Jobid

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