5 question about database

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·please answer these questions for me 

Question 1

What is a database? What is a database management system (DBMS)? What functions does a DBMS perform?

·  Question 2

What are business rules, what is their source and why are they crucial?

·  Question 3

What is a key?What is aprimary key and foreign key? Discuss their use and importance inthe relational model?

·  Question 4

What is normalization? When is a table in 1NF? When is a table in 2NF? When is a table in 3NF?

·  Question 5

Using the model below, describe the relationship and connection / cardinality between:

a. STORE and ORDER

b. STORE and EMPLOYEE

c. EMPLOYEE and DEPENDENT

d. ORDER and ORDER_LINE

e. PRODUCT and ORDER_LINE

and u can use this Power point slides to find the answers : 

Review.ppt 

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