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What is trigger?
Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
Which of the operations constitute a basic set of operations for manipulating relational data? Relational algebra operations constitute a basic set of operations for manipulati
Demonstrate your knowledge of PL/SQL programming by writing and thoroughly testing triggers and stored procedures associated with an e-commerce application that provides security l
List some instances of collection types? a) sets b) arrays c) multisets
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
Problem: a) Briefly describe what you understand by Client-Server environment b) The File Server is a simple form of Client-Server. Describe the principles of the File Serve
Explain the rules for creating a labelled precedence graph for testing view serializability. Ans: A schedule S is view serializable if it is view equivalent to a ser
Compare the Nested-loop join and block-nested loop join Ans: Nested loop join - It is costly as worst case cost, no. of block accesses needed is n r * b s + b r where b
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