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What are the two distinct aspects to the implementation of associations?
i) It is required to define data declarations which will enable details of actual links to be stored. It will comprise of defining data members in one class which can store references to objects of associated class.
ii) It is necessary to consider means by which these pointers will be manipulated by the rest of application. The details of underlying implementation of association must be hidden from client code.
What is use of generating such tables? How can you create temporary tables? When you require a table only for a short time after that you want it to disappear automatically you
UNION If R1 and R2 are two union compatible relations then R3 = R1 ∪ R2 is the relation having tuples that are either in R1 or in R2 or in both. In case, R3 will have tuples
What is the need of a log in a DBMS? Briefly describe the various types of records that are normally present in a log. Ans: The system log, which is generally writt
Importance Of File Organisation In Database To execute a database efficiently, there are various design tradeoffs needed. One of the most vital ones is the file Organisation. F
A student entity type has the following attributes,name..
Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
#question benefits and limitations of data models..
Physical Database Design Issues The database design includes the process of logical design with the use of E-R diagram, normalisation, etc., followed by the physical design.
What do you mean by an execution plan? Why is it used? How will you view it? a.) An execution plan can be known as a road map which textually or graphically illustrates the dat
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
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