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Security: In a centralised system, access to the data can be simply controlled. Though, in a distributed DBMS not only does access to replicated data have to be controlled in many locations, but also the network required to be secured. Networks over a period have become more secure, still there is a long way to go.
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
explain in details about one to one binary relationship
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
what is completeness constrent?
write an SQL statement to create the database in MYSQL server
What is a transaction ? The Transaction is a unit of data processing. For instance, many of the transactions at a bank may be withdrawal or deposit of money; transfer of money f
The PROJECT operation The project operation is used to choose the records with specified attributes as discarding the others based on some related criteria. This is denotes as ∏
Greater potential for bugs: Since the sites of a distributed system operate simultaneously, it is more complex to ensure the correctness of algorithms. The art of constructing dis
Define Join and Outer Join and differentiate between them. Ans: Join - It generates all the combinations of tuples from two relations which satisfy a join condition. Oute
What does conceptual design work? A conceptual design involves modelling independent of the DBMS.
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