Q. In unary relational operations, the symbol π is used to represent the operation called

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Q. The relational calculus is classified as

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Q. The kind of operation which is used to extend the traditional projection operation by including projection attributes in projection list is called

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Q. The expression of generalized projection can be written as

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Q. The expression which specifies the procedure to retrieve rather than retrieval content is classified as

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Q. In a query tree, the input relations of query are classified as

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Q. With the help of selection condition, the fraction of selected tuples is classified as

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Q. The most convenient operation which is used for the queries having universal quantification is classified as

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Q. Find the ID, name, dept name, salary for instructors whose salary is greater than $80,000 .

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Q. A query in the tuple relational calculus is expressed as:

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Q. Which of the following symbol is used in the place of except ?

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Q. “Find all students who have taken all courses offered in the Biology department.” The expressions that matches this sentence is :

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Q. Which of the following is the comparison operator in tuple relational calculus

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Q. An expression in the domain relational calculus is of the form

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Q. Find the names of all instructors in the Physics department together with the course id of all courses they teach:

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Q. In domain relaional calculus “there exist” can be expressed as

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