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Define an operator that a Relational Algebra does not have
Ans: Relational Algebra does not have Aggregation operators.
Lack of standards and experience: The lack of standards has considerably limited the potential of distributed DBMSs. As well, there are no tools or methodologies to help users cha
List any two disadvantages of a database system ? The disadvantages of database system are: • Database systems are difficult, complex, and time-consuming to design. • Substanti
Performance of Various Concurrency Control Mechanisms
Differentiate between a unique key and a primary key. - By default, clustered index on column are created by primary key while nonclustered index are created by unique key.
Logical Operators Rules of Precedence: Order evaluated Operator 1 All comparison operators 2
What are the functions of an accumulator? The accumulator is the register associated with the ALU operations and sometimes I/O operations. It is an integral part of ALU. It hol
Describe analysis of access paths To describe analysis of access paths, consider an example of the design of a company's employee skills database. A part of the object model fr
please describe the data base management with the easy example &give the application?
What is substitutability? Any method of a class-say A can equally well be adjured with any object belonging to any subclasses B of A. This characteristic leads to code reuse, a
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
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