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What is Object Oriented model?
This model is based on collection of objects. An object has values stored in instance variables with in the object. An object also having bodies of code that operates on the object. These bodies of code are known methods. Objects that contain same types of values and the similar methods are grouped together into classes.
Define the notation for classes and atrributes The notation for class, attribute, and operations are shown below: Figure: Class with attributes and operations A
Foreign Keys and NULL Let us take the relation: DEPT DEPT ID DNAME BUDGET D1 M
Describes the several relationship constraints through giving suitable example? Constraints on relationships: There are two kinds of constraints on relationships. 1) Mapping
composite attribute
#ques Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a p
Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
State the Object Design for Processing The object design phase comes after analysis and system design phase. The object design phase includes implementation details like as i
Attributes attached to an entity can be of various types. Simple The attribute that cannot be further separated into smaller parts and shows the basic meaning is known as a
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
Horizontal Fragmentation- Horizontal fragmentation groups together the tuples in a relation that are collectively used by the main transactions. A horizontal fragment is produced b
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