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What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
Can you help me with the following: Drop statements for all objects in the lab project. Create statements for all objects of the lab project Create indexes for foreign keys Cre
The functions of DBA ?
Multiple-mode locks : It offers two locks: exclusive locks and shared locks. But why do we require these two locks? There are a lot of transactions in the database system that neve
By using the delete operation some consisting records can be deleted from a relation. To delete some definite records from the database a condition is also specified based on which
describe objectivde of file organisation
You are working for the ABC Telecom and are given some customer records for data mining. You are asked to discover, from the data, patterns that characterize low-, medium- and high
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
Discuss along with examples about several types of attributes present in the ER model? Types of Attributes are: • SIMPLE attributes are attributes which are drawn from the ato
What are the uses of functional dependencies? To test relations to see whether they are legal under a given set of functional dependencies. To state constraints on the set
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