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Discuss along with examples about several types of attributes present in the ER model?
Types of Attributes are:• SIMPLE attributes are attributes which are drawn from the atomic value domains E.g. Name = {John} ; Age = {23}• COMPOSITE attributes: Attributes that consist of a hierarchy of attributes E.g. Address may consists of "Number", "Street" and "Suburb" → Address = {59 + ‘Meek Street' + ‘Kingsford'}• SINGLE VALUED attributes: Attributes which have only one value for each entity E.g. Name, Age for EMPLOYEE• MULTIVALUED attributes: Attributes that have a set of values for each entity E.g. Degrees of a person: ‘ BSc' , ‘MIT', ‘PhD'• DERIVED attributes: Attributes Contain values which are computed from other attributes Eg. Age can be derived from attribute DateOfBirth. In this situation, DateOfBirth might be known as Stored Attribute
Determine the OBJECTIVES of object design After passing through this unit, you should be able to: describe and apply concept of generalisation; understand and appl
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Explain natural join? Natural Join - Similar as equi-join except in which the join attributes (having similar names) are not involved in the resulting relation. Only one sets
Describe about Use Case and external case in DFD The processes are transformed those into the Use Case and external case in DFD has same characteristics which of an actor in O
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
Describe the nested-loop join and block-nested loop join. Ans: The block nested- loop join algorithm is as described below: for every block B r of relation R do beg
What is a state chart diagram? State diagrams (State Chart Diagram) explain all possible states that a particular object can get into, and how object's state changes as result
Which method is used to key transformation ? A hash method is used to key transformation.
Consider the relations described below: PHYSICIAN (regno, name, telno, city) PATIENT (pname, street, city) VISIT (pname, regno, date_of_visit, fee) Where the regno and pname ide
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