adplus-dvertising
frame-decoration

Question

In relational calculus, the expression which guarantees finite number of tuples is classified as

a.

declarative expression

b.

stable expression

c.

unsafe expression

d.

safe expression

Posted under DBMS

Answer: (d).safe expression

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. In relational calculus, the expression which guarantees finite number of tuples is classified as

Similar Questions

Discover Related MCQs

Q. The data structure in the form of tree to correspond to relational algebra expression is classified as

Q. The types of relational calculi includes

Q. If the duplicate relations will not be eliminated, the resultant tuples will be multiset of tuples rather than

Q. The SELECT operation is performed on

Q. The selection condition of SELECT operator is considered as

Q. The type of JOIN operation through which one can keep all tuples in relations without considering corresponding tuples in any other relation is classified as

Q. The process in which tuple is created by having combined attributes from two relations is classified as

Q. Consider two tuples B and C, the operation whose result includes tuples that are included in both relations or either in B or C is classified as

Q. In relational operations, the SELECT operation is written as

Q. The nodes which represents queries in the relations are classified as

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

Q. The relational calculus is classified as

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

Q. The expression of generalized projection can be written as

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

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

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

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

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

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