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Objectives
After reading this unit you should be able to:
How is concurrency identified? Concurrency in objects can be identified by the way they alter their state. Current objects can change their state independently. Aggregation imp
What is self-transition? If there is a transition which goes back to same state, it is known as "self- transition." With a trigger action exit action would be executed f
er diagram on cosmetics.
Q. Why would you choose a database system instead of simply storing data in operating system file? Define at a base concept in details. Sol. Advantages of Database over Fil
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
Information about a bank is about customers and their account. Customer has a name, address that consists of house number, area and city, and one or more phone numbers. Account ha
How nulls are treated in comparison operator? Along with comparison (relational) operators, the null values are ignored as we cannot derive the relation along with the given op
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
Single Valued Normalisation Codd in the year 1972 formed three normal forms (1NF, 2NF, and 3NF). These were based on functional dependencies between the attributes of a relati
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
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