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Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
database help
This constraint shows that the key attribute value in each tuple must be unique, i.e., no two tuples have the similar value for the key attribute. This is because the value of the
What are the advantages of by using an index and what are its disadvantages ? In difference, if the search key of a secondary index is not a candidate key, it is not sufficient
What is disadvantage of multiple inheritances? There is potential ambiguity if the similar variable or method can be inherited from more than one superclass.eg: student class m
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
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
The following variant of the primary copy asynchronous-update replication protocol has been proposed for totally replicated systems. (a) A transaction executing at site A updat
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