Data Modelling - 1

1. What are aggregates and why do you need them ?
2. What is the role of a logical data modeler and physical data modeler ?
3. How do you gather requirements for creating data model ?
4. What is the naming convention you follow ?
5. What are the different notations that can be used ?
6. What is cardinality ?
7. What are identifying and non identifying relationships ?
8. Why do you need reports from data model ?
9. What kind of Meta data do you capture in a data model ?
   
   
   Other useful links - helps in finding answers -
   * http://www.agiledata.org/essays/dataModeling101.html