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Example-GRANT CREATE SESSION TO MCA12;
(This command gives system level permission on creating a session - not portable)
GRANT SELECT ON EMP TO MCA12;
(Object level permission on table EMP)
GRANT SELECT, UPDATE, INSERT, DELETE ON EMP TO MCA12;
GRANT SELECT, UPDATE ON EMP TO MCA12, MCA13;
(Two users)
GRANT ALL ON EMP TO PUBLIC;
(All permission to every users, do not use it. It is very risky for database)
Revoke: It is used to revoke the permission granted.
What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
List and explain the memory constructs of the Oracle 12c databases?
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What are composite attributes? Composite attributes can be separated in to sub parts.
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
brief history,definition,current trends and future trends if any of data fragmentation
Why a report generator is used ? Report generator is used for print files on paper.
Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
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.
Design a generalization–specialization hierarchy for a motor-vehicle sales company. The company sells motorcycles, passenger cars, vans, and buses. Justify your placement of attrib
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