TCC233-05 - Database Management Systems - Computer Science Assignment Help

Assignment Task

Question 1

(a) Database design consists of three phases which are known as conceptual, logical and physical. Use a diagram to illustrate this database modeling concept. Compare and contrast all the three phases with the use of MAGAZINE DISTRIBUTOR COMPANY as the example.

(b) Describe the following with examples when tables are designed and created (use the scenario):

i. Data Manipulation Language (DML)
ii. Data Definition Language (DDL)
iii. Data Control Language (DCL)

(c) Describe with an example, the approach taken for the handling of data in early file-based systems that are used before the MAGAZINE DISTRIBUTOR COMPANY proposal.

Question 2

Draw an (Object Oriented Entity Relationship) OOER diagram to represent the data requirement of MAGAZINE DISTRIBUTOR COMPANY.

The OOER diagram should consist of entities, relationships, attributes associated with the entities or relationships, cardinality and optionality for the relationships and the primary key.

Question 3

(a) The diagram below shows the relationship between base table and views in a DBMS.

i. Describe base table and views using the diagram above. 
ii. What is the purpose of having the views?
iii. Explain the restrictions when updating the views.

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