Question: Suppose that two relations RA , B ) and S ( A , B ) have exactly the same schema. Then the following RA expressions

Suppose that two relations RA, B) and S(A, B) have exactly the same schema.
Then the following RA expressions are equivalent.
RnS = RAS
True
False

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Programming Questions!

Q:

Question 4 : Suppose that two relations R ( A , B ) and S ( A , B ) have exactly the same schema. Show that the following relational algebra expressions are true? R \ cap S = S - ( S - R )

Q:

Suppose that two relations R(A, B) and S(A, B) have exactly the same schema. Consider the following equalities in relational algebra, which of the above equalities hold in relational algebra? why? I....

Q:

Suppose that two relations R(A, B) and S(A, B) have exactly the same schema. Consider the following equalities in relational algebra, which of the above equalities hold in relational algebra? I. R S...

Q:

Suppose that two relations R(A, B) and S(A, B) have exactly the same schema. Consider the following equalities in relational algebra, which of the above equalities hold in relational algebra? Please...

Q:

8. Assume the schema consists of two relations R(A, B, C) and S(D, E). Consider the following queries in relational algebra: (a) A,C(OD=2(RA=E S)) (b) TAC (RA-E (OD=2S)) Are algebraic expressions (a)...

Q:

8. Assume the schema consists of two relations R(A, B, C) and S(D, E). Consider the following eries in relational algebra: A,C re algebrai c expressions (a) and (b) equivalent? Use no more than two...

Q:

Consider a schema with two relations R(A, B) and S(B, C) where all values are integers. Make no assumptions about keys. Consider the following three Relational Algebra expressions: A. A,C(RB=1(S)) B....

Q:

Consider a schema with two relations R(A, B) and S(B, C) where all values are integers. Make no assumptions about keys. Consider the following three Relational Algebra expressions: A. A,C(RB=1(S)) B....

Q:

Thank you! 5. Each row of the following table shows two queries. In the blank third column of the table write "YES" if the two queries are equivalent, and "NO" if they are not equivalent All queries...

Q:

Each row of the following table shows two queries. In the blank third column of the table write "YES" if the two queries are equivalent, and "NO" if they are not equivalent. 5. All queries refer to a...

Q:

Anastasia works for a small engineering firm that offers a basic group insurance policy for its employees. Anastasia meets with an insurance agent to determine if she should also purchase additional...

Q:

A total of 34,695 adults were asked whether they agreed with the following statement: Evolution is the best explanation for the origins of human life on earth. Table 25 compares the adults responses...

Q:

13. Both Hitler ran the Th ird Reich and Lindbergh crossed the Atlantic if neither Einstein discovered aspirin nor France bombed Pearl Harbor. Write the following compound statements in symbolic...

Q:

Noel has an initial account balance of $4,000. For the next five months, her account balance increases by $1,000 per month. After that, her account balance, b, decreases by $1,000 per month, t. Which...