Cpithw's Weblog http://indunil.wordpress.com Just another WordPress.com weblog Fri, 21 Mar 2008 21:28:16 +0000 http://wordpress.com/ en hourly 1 http://www.gravatar.com/blavatar/ca94046b00a4961ece681a5d5eb2e21b?s=96&d=http://s.wordpress.com/i/buttonw-com.png Cpithw's Weblog http://indunil.wordpress.com Determine one’s Cardinality / multiplicity http://indunil.wordpress.com/2008/03/21/determine-ones-cardinality-multiplicity/ http://indunil.wordpress.com/2008/03/21/determine-ones-cardinality-multiplicity/#comments Fri, 21 Mar 2008 21:28:16 +0000 cpithw http://indunil.wordpress.com/?p=5 ]]>

subsurper.jpg

In this image shows the relationship between Person Entity and Employee.

]]> http://indunil.wordpress.com/2008/03/21/determine-ones-cardinality-multiplicity/feed/ 0 Indunil Liyanage subsurper.jpg The connectivities between Customer and Recipient! http://indunil.wordpress.com/2008/03/20/the-connectivities-between-customer-and-recipient/ http://indunil.wordpress.com/2008/03/20/the-connectivities-between-customer-and-recipient/#comments Thu, 20 Mar 2008 19:34:25 +0000 cpithw http://indunil.wordpress.com/?p=3 ]]>

Woolworths

Here is the ER digram that shows the two connectivites of Customer and Recipient

The relationships are read as:

- A customer may be a Recipient

- A Recipient must have a customer

- A customer can exsist without a receipient

]]> http://indunil.wordpress.com/2008/03/20/the-connectivities-between-customer-and-recipient/feed/ 0 Indunil Liyanage Woolworths