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Explain the EXISTS and UNIQUE functions of SQL. Give an example for each? EXISTS: The EXISTS function takes one parameter that is a SQL statement. If any records exist which
Implementation and SQL Applications
What are views? Explain how views are different from tables? A view in SQL terminology is a one table in which is derived from other tables. These other tables could be base t
How does Tuple-oriented relational calculus vary from domain-oriented relational calculus? The tuple-oriented calculus uses a tuple variables i.e., variable whose only allowed
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))
1.Why we need data mining? Give an example to illustrate your answer. 2. Why data mining is considered as "misleading name"? 3. Distinguish the difference between database an
Distributed Database Management System
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
In Oracle what is system global area and how is it organized? The SGA is a collection of shared memory fields which along with the Oracle processes constitute an Oracle instan
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