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What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation
Illustrate the collaboration and relationship diagram A collaboration is the society of interfaces, classes and other elements which work together to provide some cooperative b
List the set operations of SQL? 1) Union 2) Intersect operation 3) The except operation
what is query processing?
What are referential integrity constraints? A value that appears in single relation for a given set of attributes also appears for a particular set of attributes in another rel
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
What is Secondary Index While making the index, generally the index table is kept in the primary memory (RAM) and the main table, because of its size is keeps in the secondary
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
What is the main advantage of the object model? What are its different components? The object model focuses on the logical data structures. Each object model comprises of many
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
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