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What are domain constraints? A domain is a set of values that might be assigned to an attribute .all values that appear in a column of a relation must be taken fro
Define the terms i) Entity set ii) Relationship set Entity set: The set of all entities of the similar type is termed as an entity set. Relationship set: The set of all rela
explain exhausitively the problems associated with er diagrams with ellustrations
Define average latency time. The average latency time of the disk is one-half the time for a full rotation of the disk.
Explain current page table and shadow page table. The key idea behind the shadow paging method is to maintain two page tables during the life of the transaction: the current pa
Which model is record based logical model? Network Modelis basically known as record based logical model.
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
What does Aggregation mean?
Northwind Pty Ltd sells a variety of food products throughout the world. They want to use the reporting features of SAP''s Business Information Warehouse to better understand thei
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
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