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Define tuple variable
Tuple variable is a type of variable whose domain is the set of all tuples.
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
what does glory be mean
what is cascading? what is rollback cascading? please explain in detail
what factors might influence a company to outsource its IT infrascture.
education.
Explain about database system structure? Storage manager Authorization and integrity manager Transaction manager File manager Buffer manager Storage manager
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
The Database Approach In order to overcome the limits of a file system, a new approach was needed. Hence a database approach emerged. A database is a persistent collection of
Explain the Role of a database administrator a. Defining the Schema The DBA describes the schema which consists of the structure of the data in the application. The DBA
Describe Specialsation and generalization? Specialisation /generalization: This is a top down and bottom up approach to the design of database. It displays the IS_A relation
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