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Which is an advantage of view?
The Advantages of view is Data security, Derived columns and Hiding of complex queries
The Third Normal Form (3NF) Even though, transforming a relation that is not in 2NF into a number of relations that are in 2NF take out many of the anomalies, it does not neces
In tuple relational calculus P1 → P2 is equivalent to ? A In tuple relational calculus P1→ P2 is equivalent to ¬P1 V P2. (The logical implication expression A B, meaning
What is Message switching Message switching transmits data units which can be arbitrarily long. Packet switching has a utmost packet size, if any message longer than that, it s
What is use of generating such tables? How can you create temporary tables? When you require a table only for a short time after that you want it to disappear automatically you
Explain Derived and Non-Derived Attribute? In few cases, two or more attribute values are related, for instance, Age and BirthDate attributes of a person. For specific person e
external and internal mapping with examples
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
What are axioms? Axioms or rules of inference give a simpler technique for reasoning about
Gaps in sequence values can happen when: - A rollback happens that is when a statement changes are not accepted. - When the system crashes - When a sequence i
Which model is record based logical model? Network Modelis basically known as record based logical model.
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