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Derived horizontal fragmentation:Some applications may include a join of two or more relations. If the relations are stored at dissimilar locations, there may be a major overhead in processing the join. In this type of cases, it may be more appropriate to make sure that the relations or fragments of relations that are joined together are at the similar location. We can get this using derived horizontal fragmentation.
After Reading the basis of concepts relating to distributed database systems, let us outline the process of design of distributed database systems.
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Determine the Other System Design Issue How to realise subsystems; through hardware or software? How is object model mapped on chosen hardware software? Mapping
What is difference between primary index and secondary index? Primary Index a) It is an ordered file whose records are of fixed length along with two fields. b) Only base
Define the terms 1) physical schema 2) logical schema. Physical schema: The physical schema explains the database design at the physical level, which is the lowest lev
An example of a weak entity is Staff because the availabilityID cannot be uniquely identified unless it is used in conjunction with the foreign key known as availabilityID in the A
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
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QUESTION (a) Give two advantages of using Linked List as compared to arrays. (b) (i) You are working as programmer at the Orange Mauritius branch. You have been asked to cre
. Ashutosh Dubey who is the director of Gyan Gurukul want a three-level schema architecture for the Gyan Gurukul Company that provide better security also design a data abstraction
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