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Ancestry database records information about family trees . Following information is recorded about each person: FIRSTNAME first name SURNAME surname MNAME maiden name (if
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
client server architeutre
Question: (a) Can a set of data requirements be correctly modelled by two or more different ER diagrams? Explain your answer. You may use a small example, if you think it will
What is object containment? References among objects can be used to model dissimilar real-world concepts.
Describe the Association: Design Before we describe association design let us define association "Association is set of links between two objects in the object model". It is
coventions for displaying an ER schema as ER diagram
Fourth Normal Form (4NF) When attributes in a relation have multi-valued dependency, further Normalization to 4NF and 5NF are needed. Let us first find out what multi-valued d
Benefits and limitations
Increased parallelism : Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have
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