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List the drawbacks of relational database system
A) Repetition of data
B) Inability to s certain information.
What is Functional Dependency? A Functional dependency is shown by X Y among two sets of attributes X and Y that are subsets of R specifies a constraint on the possible tuple
What are wait-for-graphs?Give the algorithm to construct a wait-for-graph from a given schedule of transactions? How can deadlocks be detected from wait-for-graphs? Ans: The
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
What is Trigger? Trigger: A database trigger is procedural code which is automatically executed in response to specific events on a particular table in a database. Triggers can
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
What are the Requirements of algorithm designer Algorithm designer should: i) Select proper algorithm so as to minimize implementation cost ii) Find most appropriate d
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
It is not possible to make an ABAP/4 program, which having only Subroutines. False. We can make ABAP/4 program, which having only Subroutines.
What are the advantages of creating a table from existing table?
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