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What are uncommitted modifications? The immediate-modification technique permits database modifications to be output to the database whereas the transaction is still in the act
Which model is record based logical model? Network Modelis basically known as record based logical model.
exercise solution
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
Define the Query optimisation The query parser commonly generates a standard initial tree to correspond to an SQL query, with no doing any optimization. Such type of a canonica
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
prototype of a distributed information system for a national car part retail outlet chain.
construct an er diagram for a hospital with a set of patients and a set of medical doctors. associate with each patient a log of various test and examination conducted.convert er d
Where does view definition stored? A view definition is permanently stored as part of the database.
What's the difference between a primary key and a unique key? Both primary key and unique key enforces uniqueness of the column on which they are explained. But by default prim
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