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Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
What is the use of rename operation? Rename operation is used to rename both relations and an attributes. It uses the as clause, taking the form: Old-name as new-name.
wrie a report on whether a BSc n information systems develops the skills required by employers in Database administration
Define two-phase locking protocol. Ans: Two-phase locking is significance in the context of ensuring that schedules are serializable. The two-phase locking protocol defines a p
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
(A) For the relation; CarSales (RegNo, BuyerName, Address, SalesPerson, Make, Model, Commission) The following functional dependences hold, RegNo _ID à Make, Model Reg
What functions does a data dictionary perform? In a (DBMS)data management system, the principal functions performed by the data dictionary are Management of data defini
what is Lossless-join decomposition
Data Replication "If a relation R has its copies kept at two or more sites, then it is considered replicated". But why do we replicate a relation? There are several advan
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