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The figure below depicts the conceptual diagram of a banking system. (a) Describe one example relevant to the system in figure, for each of the 4 types of enterprise appl
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
Conflicting Operations in Schedule: The three simple ways of interleaved instruction implement of transactions T1 and T2. Please note that in the following tables the first col
Describe Specialsation and generalization? Specialisation /generalization: This is a top down and bottom up approach to the design of database. It displays the IS_A relation
What is multiplicity in the associations? Give an example to explain multiplicity? Multiplicity in association indicate number of objects participate in any relationship. For
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
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
What is multiple relationship ?
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
If the deletion violates referential integrity constraint, then three alternatives are available: Default option: - refuse the deletion. It is the job of the DBMS to describ
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