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Define an operator that a Relational Algebra does not have
Ans: Relational Algebra does not have Aggregation operators.
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What are multiple inheritances? Multiple inheritances allow a class to inherit variables and methods from many super classes.
Describe the functions and features of foreign key? Foreign Key : The primary key of one file or table that is implanted in another file or table to implement the relationships
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 permi
HOW MANY TYPES OF VIEWS
What does conceptual design work? A conceptual design involves modelling independent of the DBMS.
What is the use of group by clause? Group by clause is used to apply aggregate functions to a set of tuples. The attributes given in the group by clause are used to
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What are the Requirements of algorithm designer Algorithm designer should: i) Select proper algorithm so as to minimize implementation cost ii) Find most appropriate d
Describe association design of an object by giving one suitable example of it. The Design of Associations Associations are "glue" of advanced object oriented analysis and
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