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What is the main difference between read-only and update methods?
A read-only method does not affect the values of a variable in an object, whereas an update method may alter the values of the variables
Explain the Management of Data Store Every system irrespective of its nature of application requires storing permanent data for consequent use in problem solving. Some objects
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
What is meant by normalization of data? It is a process of examining the given relation schemas based on their Functional Dependencies (FDs) and primary key to achieve the prop
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
Discuss the mechanism to read data from and write to a disk? Disk read/write heads are mechanisms in which read data from or write data to disk drives. The heads have gone by
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Having Clause with sub queries: First we have to recollect the GROUP BYclause. The following query searches the minimum salary in every department. SELECT DEPTNO, MIN (SAL)
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
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