Assignment Task
QUESTION 1
1. (a) List two advantages and two disadvantages of the database approach compared with the file-based approach to data processing.
(b) List four of the functions or services that should be provided by a DBMS (database management system).
2. (a) What are the objectives of the three-level architecture?
(b) Explain the terms: logical data independence; physical data independence.
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Get Help Now!3. Using examples of your own, define the following types of relational model constraints:
• entity integrity constraint
• referential integrity constraint
• domain constraint
4. (a) Explain how Business Intelligence (BI) can add value to an organisation’s data resource.
(b) Eplain the difference between BI systems and operational database systems.
(c) What is data cleaning (data cleansing), and why is it an essential part of preparing data for a data warehouse?
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