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List some security violations (or) name any forms of malicious access.
A) Unauthorized reading of data
B) Unauthorized modification of data
C) Unauthorized destruction of data.
What is vertical fragmentation? Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
What is primary Key Explain? Primary Key - Primary key is one of the candidate keys. It should be selected such in which its attribute values are never, or very rarely, chang
Which element in the database can modified by changing the data dictionary? Data elements in the database can be changed or modified through changing the data dictionary.
What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
Data independence seems that "the application is independent of the access strategy and storage structure of data". In other words, the ability to change the schema definition in o
what is correlation in nested query
Serialisability: Any schedule that makes the similar results as a serial schedule is known as a serialisable schedule. But how can a schedule are determined to be serialisable or n
why shadow copy technique is used?
What are the two statements regarding transaction? The two statements regarding transaction of the form are:- A) Begin transaction B) End transaction
While using extract datasets it is required to have a special workarea for interface False. It is not required to have a special workarea for interface
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