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Problem:
‘Users and Information system specialists need to spend inordinate amounts of time locating and gathering data' (Watson and Hal, 1998)
Recent developments in the area of Data Warehousing and its associated technologies claim to be able to improve information management in organisations.
Required:
(i) Describe the terms ‘Database' and ‘Data Warehouse'.
(ii) Show how the Data Warehousing approach to information management improves on the Data Base Management Systems (DBMS) approach.
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
A use case diagram giving a pictorial overview of user requirements and brief use case descriptions. As the case study contains only an outline of a business scenario, you will als
Define the Traditional System Analysis and Design Traditional System Analysis and Design (SAD) have three basic life cycle models. A typical software lifecycle consists of the
State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
Objectives After Reading this part, you should be able to: Explain the term CONCURRENCY; Describe the term transaction and concurrent transactions; Talk about co
Security And Integrity After Reading the concepts of database recovery in the last section, let us now deal with a vital concept that helps in minimizing consistency errors in
If the insertion violates one or more constraints, then two alternatives are available: Default option: - Insertion can be discarded and the reason of refusal can also be ex
What is equi join? Equi Join - It generates all the combinations of tuples from two relations which satisfy a join condition along with only equality comparison (=).
Probelm: a) In the context of OODBMS, define the following terms with appropriate examples. (i) Object class. (ii) Abstract class. (iii) Aggregation. (iv)
explain the steps for reduction of er model into relational model?
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