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Selective replication: This is a combination of generating small fragments of relation and replicating them rather than a entire relation. The data should be fragmented on require basis of several sites, as per the frequency of use, or else data is kept at a centralised site. The aim of this strategy is to have just the benefits of the other approach but none of the drawbacks. This is the most commonly used strategy as it gives flexibility.
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
what is relationship inheritance and attribute inheritance
what is query processing ,query optimization and performance turring?
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
Scenario 1: Power goes out after the first instruction. What happens?
List the drawbacks of relational database system A) Repetition of data B) Inability to s certain information.
Identification of concurrency Identification of concurrency: Dynamic model identifies concurrency. Two objects are said to be parallel (concurrent) if they can receive events a
Explain different categories of failures that occur in Oracle database? Categories of Failures - In Oracle database subsequent types of failures can occurred: Statement Failu
The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product
Now that she understands more about the benefits of databases, the play-scheme manager would like to extend the play-scheme database to include data for schools and instructors as
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