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Question:
i) Explain the terms data warehousing and data mining.
ii) Discuss the importance of the following security principles that a digital firm should amongst others, normally implement: Authentication, Availability and Confidentiality.
iii) What is the importance of an Intranet in a Digital firm.
iv) How should an organisation acquire and manage the firm's hardware and software assets.
v) How can information systems help people working in a group make decisions more efficiently?
why data in an RDMS need to be normalised
Construct a clean ans concise ER diagram for the database indicating the cardinality mapping for Employee management syatem
Relations create the database. They must satisfy various properties, like no duplicate tuples, no ordering of tuples, and atomic attributes, etc. Relations that satisfy these basic
DROP TABLE Command: When an existing object is not needed for further use, it is always better to eliminate it from the database. To remove the existing object from the databas
What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or
An employee record has the following structure struct employee { int eno; char name[22]; float salary; char dept[10];}; (i) Calculate the record size R in bytes.
Selective replication: This is a combination of generating small fragments of relation and replicating them rather than a entire relation. The data should be fragmented on require
explain multi key file organisation
Explain what is Aggregation ? Aggregation: This is used whenever we intend to show a relationship between an entity and the relationship. There is no provision for this in th
ddlc
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