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Examples:-
Hierarchical Model: It tells data as and relationships by hierarchy of data values. Figure illustrates an example of hierarchical model. Now a day's these models are not used in commercial DBMS products.
Figure: An example of Network Model
Figure: An example of Hierarchical Model
Whenever the LIMIT clause will be used? LIMIT is used for the following kinds of problems: 1) Answering questions about first or last and largest or smallest 2) Splitting
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
List some instances of collection types? a) sets b) arrays c) multisets
Describe the advantage of State chart Diagram A state chart represents a state machine, emphasizing flow of control from one state to other. A state machine is a behaviour whi
what is natural join?
What is Relational calculus? Relational calculus is a Non- Procedural language.
What are the advantages of creating a table from existing table?
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the
Differentiate strict two phase locking protocol and rigorous two phase locking protocol. In strict two phase locking protocol all exclusive mode locks taken by a transaction is
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