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Cardinality shows the number of instances of an entity associated with another entity participating in a relationship. Depend on the cardinality binary relationship can be further dividing into the following categories:
Example: Relationship between university/college and principal
One college only have at the most one principal and one principal can be assigned to only one college.
Likewise we can define the relationship among Vice Chancellor and university.
Example: //REVOKE ALL ON EMP FROM MCA12; (All permissions will be cancelled) You can also cancel only some of the permissions. Drop: A user-
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
WHAT IS DSS? WRITE ITS REQUIREMENTS.
The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
Draw and explain the three level architecture of the database system? A DBMS gives three levels of data is said to follow three-level architecture. The trget of the three-schem
Briefly describe the different kinds of users of a DBMS. Ans: Different sorts of DBMS users are: (a) Software Engineers: These are the people accountable for developing ap
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What is Data dictionary? A data dictionary is a reserved space in a database that is employed to store information about the database itself. A data dictionary may consist o
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
how can apply joins on table
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