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Increased parallelism: Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have greater chances that the required data is found on the site where the transaction is implementing. Hence, data replication can minimise movement of data among sites.
Consider the table student and list names of students in the departments other than maths and computer. SELECT std_name FRM student WHERE dept_name NOT IN (‘Maths','Computer);
why are older data models are being replaced by new data models
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
What are the object-oriented approaches Software systems which are designed with structured design methodology never support some of desired quality attributes for example reus
How many types of Views are there? There are Four types of views:- Database View Help View Projection View Maintenance View
What is Candidate Key Super Key or Candidate Key: It is such an attribute of a table that can uniquely recognize a row in a table. Generally they have unique values and can n
Determine the minimal set of functional dependencies for the following data. This table is part of the OHSU database of extracurricular activities and tracks the DMICE band's co
How Relational Calculus is different from Relational Algebra? What do understand by TRC queries and DRC queries? Ans: Relational calculus contain two calculi, the tuple relati
need to get answer for questions 3&4 on this page in part 1
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
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