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Objectives
After reading this part, you should be able to:
why we fregment at all?
Consider the relations described below: PHYSICIAN (regno, name, telno, city) PATIENT (pname, street, city) VISIT (pname, regno, date_of_visit, fee) Where the regno and pname ide
Attributes having a one value for a particular entity. For instance, Age is a single valued attribute of a student entity. Attributes that have more than single values
What is relational model feature? A relational model feature is much more data independence than some other database models.
Explain the differences between structured data and unstructured data. Structured data are facts concerning objects and events. The most significant structured data are numeric
Determine the advantage of object-orientation Finally, object-orientation has advantage of continuity throughout analysis, persistent representation and design implementation.
what is meant semantic query optimization? how does it differ from other query optimization techniques?
Database systems have many opposite efforts ?
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
Redo Logs: Any database must have minimum two redo logs. These are the rules for the database; the redo logs record all modifies to the system objects or user objects. If any type
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