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Define tuple variable?
Tuple variables are used for comparing two tuples in the same relation. The tuple variables are explained in the from clause by way of the as clause.
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
The following relational database schema represents part of a simplified database used by a library: tblBook (BookID, Title, PublisherID, Category,Price) tblPublisher (Publishe
What is Nested Trigger? A trigger can also having INSERT, UPDATE and DELETE logic within itself, so when the trigger is fired because of data modification it can also cause ano
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
Define the Immediate Update The immediate update methods may apply changes to the database on disk before the transaction arrives a successful conclusion. Though, these change
How external/conceptual mapping and conceptual /internal mapping is performed
in case of functional dependencies how we get the higher normal form.
What are the advantages of creating a table from existing table?
what is un ordered and ordered file managment?
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
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