Question: The Project operation selects tuples with some attributes that we wish to include but some attribute we do not want to include in the final relation. We use the lowercase______ to denote Project operation.
Answer:
MCQ: The Project operation selects tuples with some attributes that we wish to include but some attribute we do not want to include in the final relation. We use the lowercase______ to denote Project operation.
Correct Answer:
A. Greek letter rho (ρ)
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Related Questions
- 1. The Binary operation Union, denoted, as in the set theory by _____
- 2. If we want to include attributes from two different relations, which of the following operations is needed?
- 3. Which of the following operation allows us to find the tuples that are in one relation but are not in another relation?
- 4. Which of the following operation, denoted by cross (×), allows to combine the information from any two relation.
- 5. Suppose we wish to find all customers who have both a loan and an account. Which of the following operation allows us to produce this relation?
- 6. Which of the following operation that allows us to combine certain selections and a Cartesian product into one operation?
- 7. Natural join operation is denoted by symbol____
- 8. It is convenient at times to write a relational algebra expression by assigning parts of it to temporary relation variables. Which of the following operation will be used for that?
- 9. Which of the following symbol can be used for Assignment operation in the relational algebra expression?
- 10. Which of the following take a collection of values and return a single value as a result?
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