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Event
Occurrence of a process is called event. In other words, the object can receive many input instructions. The changes which occur due to these instructions are known as events. For example, tossing a coin is input, but appearance of either HEAD or TAIL is an event.
Define an abstraction by which relationships are treated as higher level entities Ans: Aggregation. It is an abstraction by which relationships are treated as higher level
What is multiple relationship ?
Attributes attached to an entity can be of various types. Simple The attribute that cannot be further separated into smaller parts and shows the basic meaning is known as a
Why is need for the multiple access paths?
You are required to write a report which evaluates two of the following issues in relation to your case study database: a. Security issues b. Performance issues c. Backup
describe objectivde of file organisation
Competition entrants can be either Individuals, or Teams. A Team is usually sponsored by a business, and, in that case, the team members would all wear T-shirts with the sponsoring
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
Enumerate or state the steps in creating a relevant database of a shop.
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