ERD

ERD

1. Attributes

   • single
   • multi
     • having more than one value
   • derived
   • composite
     • divided into sub parts

2. Entity

   • strong
   • weak

3. Keys

   • primary
   • candidate
   • super
   • partial

4. Mapping

   • entity
   • relationship
   • attributes

5. Relationship

   • cardinality
   • participation
     • full
     • partial
   • binary
   • roles

6. notation forms

   • chen
   • table
   • crow-feet