Discuss the importance of data modeling.

 

How do you translate business rules into data model components?

What three languages were adopted by the DBTG to standardize the basic network data model, and why was such standardization important to users and designers?

Use the scenario described by “A customer can make many payments, but each payment is made by only one customer” as the basis for an entity relationship diagram (ERD) representation.

 

What is a relationship, and what three types of relationships exist?

Give an example of each of the three types of relationships.

What is a table, and what role does it play in the relational model?

What is logical independence?

What is physical independence?

What is the difference between a database and a table?

 

Why are entity integrity and referential integrity important in a  database?

 

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